kc3-lang/kc3

diff --git a/.gitignore b/.gitignore
index a61fcdf..9ec6577 100644
--- a/.gitignore
+++ b/.gitignore
@@ -45,6 +45,14 @@ libc3/window/cairo/xcb/demo/c3_window_cairo_xcb_demo
 libc3/window/cairo/xcb/demo/c3_window_cairo_xcb_demo_asan
 libc3/window/cairo/xcb/demo/c3_window_cairo_xcb_demo_cov
 libc3/window/cairo/xcb/demo/c3_window_cairo_xcb_demo_debug
+libc3/window/sdl2/demo/c3_window_sdl2_demo
+libc3/window/sdl2/demo/c3_window_sdl2_demo_asan
+libc3/window/sdl2/demo/c3_window_sdl2_demo_cov
+libc3/window/sdl2/demo/c3_window_sdl2_demo_debug
+libc3/window/sdl2/demo/macos/c3_window_sdl2_demo.app/
+libc3/window/sdl2/demo/macos/c3_window_sdl2_demo_asan.app/
+libc3/window/sdl2/demo/macos/c3_window_sdl2_demo_cov.app/
+libc3/window/sdl2/demo/macos/c3_window_sdl2_demo_debug.app/
 .libs/
 *.lo
 *.o
diff --git a/libc3/gen.mk b/libc3/gen.mk
index 5d18f4a..13bfc86 100644
--- a/libc3/gen.mk
+++ b/libc3/gen.mk
@@ -86,7 +86,7 @@ GENERATED_FILES = \
 
 gen: ${GENERATED_FILES}
 
-list_init.c, list_init.h, tag_init.c, tag_init.h: tag_init.rb
+list_init.c list_init.h tag_init.c tag_init.h: tag_init.rb
 	ruby tag_init.rb
 
 SED_BITS_8 = sed \
diff --git a/libc3/sources.mk b/libc3/sources.mk
index 6d8f670..318bfcf 100644
--- a/libc3/sources.mk
+++ b/libc3/sources.mk
@@ -125,6 +125,7 @@ HEADERS = \
 	skiplist_node__fact.h \
 	str.h \
 	struct.h \
+	struct_type.h \
 	sw.h \
 	sym.h \
 	tag.h \
@@ -264,6 +265,7 @@ SOURCES = \
 	skiplist__fact.c \
 	skiplist_node__fact.c \
 	str.c \
+	struct.c \
 	sw.c \
 	sym.c \
 	tag.c \
@@ -412,6 +414,7 @@ LO_SOURCES = \
 	skiplist__fact.c \
 	skiplist_node__fact.c \
 	str.c \
+	struct.c \
 	sw.c \
 	sym.c \
 	tag.c \
diff --git a/libc3/sources.sh b/libc3/sources.sh
index c8e269e..11866e9 100644
--- a/libc3/sources.sh
+++ b/libc3/sources.sh
@@ -1,4 +1,4 @@
 # sources.sh generated by update_sources
-HEADERS='abs.h arg.h array.h binding.h bool.h buf.h buf_file.h buf_inspect.h buf_inspect_s16.h buf_inspect_s16_binary.h buf_inspect_s16_decimal.h buf_inspect_s16_hexadecimal.h buf_inspect_s16_octal.h buf_inspect_s32.h buf_inspect_s32_binary.h buf_inspect_s32_decimal.h buf_inspect_s32_hexadecimal.h buf_inspect_s32_octal.h buf_inspect_s64.h buf_inspect_s64_binary.h buf_inspect_s64_decimal.h buf_inspect_s64_hexadecimal.h buf_inspect_s64_octal.h buf_inspect_s8.h buf_inspect_s8_binary.h buf_inspect_s8_decimal.h buf_inspect_s8_hexadecimal.h buf_inspect_s8_octal.h buf_inspect_sw.h buf_inspect_sw_binary.h buf_inspect_sw_decimal.h buf_inspect_sw_hexadecimal.h buf_inspect_sw_octal.h buf_inspect_u16.h buf_inspect_u16_binary.h buf_inspect_u16_decimal.h buf_inspect_u16_hexadecimal.h buf_inspect_u16_octal.h buf_inspect_u32.h buf_inspect_u32_binary.h buf_inspect_u32_decimal.h buf_inspect_u32_hexadecimal.h buf_inspect_u32_octal.h buf_inspect_u64.h buf_inspect_u64_binary.h buf_inspect_u64_decimal.h buf_inspect_u64_hexadecimal.h buf_inspect_u64_octal.h buf_inspect_u8.h buf_inspect_u8_binary.h buf_inspect_u8_decimal.h buf_inspect_u8_hexadecimal.h buf_inspect_u8_octal.h buf_inspect_uw.h buf_inspect_uw_binary.h buf_inspect_uw_decimal.h buf_inspect_uw_hexadecimal.h buf_inspect_uw_octal.h buf_parse.h buf_parse_s16.h buf_parse_s32.h buf_parse_s64.h buf_parse_s8.h buf_parse_sw.h buf_parse_u16.h buf_parse_u32.h buf_parse_u64.h buf_parse_u8.h buf_parse_uw.h buf_save.h c3.h c3_main.h call.h ceiling.h cfn.h character.h compare.h config.h env.h error.h error_handler.h eval.h f32.h f64.h fact.h facts.h facts_cursor.h facts_spec.h facts_spec_cursor.h facts_with.h facts_with_cursor.h file.h float.h fn.h fn_clause.h frame.h hash.h ident.h integer.h io.h list.h list_init.h log.h map.h module.h operator.h ptag.h quote.h s16.h s32.h s64.h s8.h sequence.h set__fact.h set__tag.h set_cursor__fact.h set_cursor__tag.h set_item__fact.h set_item__tag.h sha1.h sign.h skiplist__fact.h skiplist_node__fact.h str.h struct.h sw.h sym.h tag.h tag_init.h tag_type.h time.h tuple.h type.h types.h u16.h u32.h u64.h u8.h ucd.h uw.h var.h '
-SOURCES='abs.c arg.c array.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_inspect_s16.c buf_inspect_s16_binary.c buf_inspect_s16_decimal.c buf_inspect_s16_hexadecimal.c buf_inspect_s16_octal.c buf_inspect_s32.c buf_inspect_s32_binary.c buf_inspect_s32_decimal.c buf_inspect_s32_hexadecimal.c buf_inspect_s32_octal.c buf_inspect_s64.c buf_inspect_s64_binary.c buf_inspect_s64_decimal.c buf_inspect_s64_hexadecimal.c buf_inspect_s64_octal.c buf_inspect_s8.c buf_inspect_s8_binary.c buf_inspect_s8_decimal.c buf_inspect_s8_hexadecimal.c buf_inspect_s8_octal.c buf_inspect_sw.c buf_inspect_sw_binary.c buf_inspect_sw_decimal.c buf_inspect_sw_hexadecimal.c buf_inspect_sw_octal.c buf_inspect_u16.c buf_inspect_u16_binary.c buf_inspect_u16_decimal.c buf_inspect_u16_hexadecimal.c buf_inspect_u16_octal.c buf_inspect_u32.c buf_inspect_u32_binary.c buf_inspect_u32_decimal.c buf_inspect_u32_hexadecimal.c buf_inspect_u32_octal.c buf_inspect_u64.c buf_inspect_u64_binary.c buf_inspect_u64_decimal.c buf_inspect_u64_hexadecimal.c buf_inspect_u64_octal.c buf_inspect_u8.c buf_inspect_u8_binary.c buf_inspect_u8_decimal.c buf_inspect_u8_hexadecimal.c buf_inspect_u8_octal.c buf_inspect_uw.c buf_inspect_uw_binary.c buf_inspect_uw_decimal.c buf_inspect_uw_hexadecimal.c buf_inspect_uw_octal.c buf_parse.c buf_parse_s16.c buf_parse_s32.c buf_parse_s64.c buf_parse_s8.c buf_parse_sw.c buf_parse_u16.c buf_parse_u32.c buf_parse_u64.c buf_parse_u8.c buf_parse_uw.c buf_save.c c3.c call.c ceiling.c cfn.c character.c compare.c env.c error.c error_handler.c eval.c f32.c f64.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c file.c fn.c fn_clause.c frame.c hash.c ident.c integer.c io.c license.c list.c list_init.c log.c map.c module.c operator.c ptag.c quote.c s16.c s32.c s64.c s8.c sequence.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c sign.c skiplist__fact.c skiplist_node__fact.c str.c sw.c sym.c tag.c tag_add.c tag_band.c tag_bor.c tag_bxor.c tag_div.c tag_init.c tag_mod.c tag_mul.c tag_shift_left.c tag_shift_right.c tag_sub.c tag_type.c time.c tuple.c type.c u16.c u32.c u64.c u8.c ucd.c uw.c var.c '
-LO_SOURCES='abs.c arg.c array.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_inspect_s16.c buf_inspect_s16_binary.c buf_inspect_s16_decimal.c buf_inspect_s16_hexadecimal.c buf_inspect_s16_octal.c buf_inspect_s32.c buf_inspect_s32_binary.c buf_inspect_s32_decimal.c buf_inspect_s32_hexadecimal.c buf_inspect_s32_octal.c buf_inspect_s64.c buf_inspect_s64_binary.c buf_inspect_s64_decimal.c buf_inspect_s64_hexadecimal.c buf_inspect_s64_octal.c buf_inspect_s8.c buf_inspect_s8_binary.c buf_inspect_s8_decimal.c buf_inspect_s8_hexadecimal.c buf_inspect_s8_octal.c buf_inspect_sw.c buf_inspect_sw_binary.c buf_inspect_sw_decimal.c buf_inspect_sw_hexadecimal.c buf_inspect_sw_octal.c buf_inspect_u16.c buf_inspect_u16_binary.c buf_inspect_u16_decimal.c buf_inspect_u16_hexadecimal.c buf_inspect_u16_octal.c buf_inspect_u32.c buf_inspect_u32_binary.c buf_inspect_u32_decimal.c buf_inspect_u32_hexadecimal.c buf_inspect_u32_octal.c buf_inspect_u64.c buf_inspect_u64_binary.c buf_inspect_u64_decimal.c buf_inspect_u64_hexadecimal.c buf_inspect_u64_octal.c buf_inspect_u8.c buf_inspect_u8_binary.c buf_inspect_u8_decimal.c buf_inspect_u8_hexadecimal.c buf_inspect_u8_octal.c buf_inspect_uw.c buf_inspect_uw_binary.c buf_inspect_uw_decimal.c buf_inspect_uw_hexadecimal.c buf_inspect_uw_octal.c buf_parse.c buf_parse_s16.c buf_parse_s32.c buf_parse_s64.c buf_parse_s8.c buf_parse_sw.c buf_parse_u16.c buf_parse_u32.c buf_parse_u64.c buf_parse_u8.c buf_parse_uw.c buf_save.c c3.c call.c ceiling.c cfn.c character.c compare.c env.c error.c error_handler.c eval.c f32.c f64.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c file.c fn.c fn_clause.c frame.c hash.c ident.c integer.c io.c license.c list.c list_init.c log.c map.c module.c operator.c ptag.c quote.c s16.c s32.c s64.c s8.c sequence.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c sign.c skiplist__fact.c skiplist_node__fact.c str.c sw.c sym.c tag.c tag_add.c tag_band.c tag_bor.c tag_bxor.c tag_div.c tag_init.c tag_mod.c tag_mul.c tag_shift_left.c tag_shift_right.c tag_sub.c tag_type.c time.c tuple.c type.c u16.c u32.c u64.c u8.c ucd.c uw.c var.c ../libtommath/bn_cutoffs.c ../libtommath/bn_mp_2expt.c ../libtommath/bn_mp_abs.c ../libtommath/bn_mp_add.c ../libtommath/bn_mp_add_d.c ../libtommath/bn_mp_and.c ../libtommath/bn_mp_clamp.c ../libtommath/bn_mp_clear.c ../libtommath/bn_mp_clear_multi.c ../libtommath/bn_mp_cmp.c ../libtommath/bn_mp_cmp_d.c ../libtommath/bn_mp_cmp_mag.c ../libtommath/bn_mp_cnt_lsb.c ../libtommath/bn_mp_complement.c ../libtommath/bn_mp_copy.c ../libtommath/bn_mp_count_bits.c ../libtommath/bn_mp_div.c ../libtommath/bn_mp_div_2.c ../libtommath/bn_mp_div_2d.c ../libtommath/bn_mp_div_3.c ../libtommath/bn_mp_div_d.c ../libtommath/bn_mp_dr_is_modulus.c ../libtommath/bn_mp_dr_reduce.c ../libtommath/bn_mp_dr_setup.c ../libtommath/bn_mp_error_to_string.c ../libtommath/bn_mp_exch.c ../libtommath/bn_mp_exptmod.c ../libtommath/bn_mp_gcd.c ../libtommath/bn_mp_get_double.c ../libtommath/bn_mp_get_i32.c ../libtommath/bn_mp_get_i64.c ../libtommath/bn_mp_get_mag_u32.c ../libtommath/bn_mp_get_mag_u64.c ../libtommath/bn_mp_grow.c ../libtommath/bn_mp_init.c ../libtommath/bn_mp_init_copy.c ../libtommath/bn_mp_init_multi.c ../libtommath/bn_mp_init_size.c ../libtommath/bn_mp_invmod.c ../libtommath/bn_mp_lcm.c ../libtommath/bn_mp_lshd.c ../libtommath/bn_mp_mod.c ../libtommath/bn_mp_mod_2d.c ../libtommath/bn_mp_montgomery_calc_normalization.c ../libtommath/bn_mp_montgomery_reduce.c ../libtommath/bn_mp_montgomery_setup.c ../libtommath/bn_mp_mul.c ../libtommath/bn_mp_mul_2.c ../libtommath/bn_mp_mul_2d.c ../libtommath/bn_mp_mul_d.c ../libtommath/bn_mp_mulmod.c ../libtommath/bn_mp_neg.c ../libtommath/bn_mp_or.c ../libtommath/bn_mp_radix_size.c ../libtommath/bn_mp_reduce.c ../libtommath/bn_mp_reduce_2k.c ../libtommath/bn_mp_reduce_2k_l.c ../libtommath/bn_mp_reduce_2k_setup.c ../libtommath/bn_mp_reduce_2k_setup_l.c ../libtommath/bn_mp_reduce_is_2k.c ../libtommath/bn_mp_reduce_is_2k_l.c ../libtommath/bn_mp_reduce_setup.c ../libtommath/bn_mp_rshd.c ../libtommath/bn_mp_set.c ../libtommath/bn_mp_set_double.c ../libtommath/bn_mp_set_i32.c ../libtommath/bn_mp_set_i64.c ../libtommath/bn_mp_set_l.c ../libtommath/bn_mp_set_u32.c ../libtommath/bn_mp_set_u64.c ../libtommath/bn_mp_set_ul.c ../libtommath/bn_mp_sqr.c ../libtommath/bn_mp_sqrt.c ../libtommath/bn_mp_sub.c ../libtommath/bn_mp_sub_d.c ../libtommath/bn_mp_xor.c ../libtommath/bn_mp_zero.c ../libtommath/bn_s_mp_add.c ../libtommath/bn_s_mp_balance_mul.c ../libtommath/bn_s_mp_exptmod.c ../libtommath/bn_s_mp_exptmod_fast.c ../libtommath/bn_s_mp_invmod_fast.c ../libtommath/bn_s_mp_invmod_slow.c ../libtommath/bn_s_mp_karatsuba_mul.c ../libtommath/bn_s_mp_karatsuba_sqr.c ../libtommath/bn_s_mp_montgomery_reduce_fast.c ../libtommath/bn_s_mp_mul_digs.c ../libtommath/bn_s_mp_mul_digs_fast.c ../libtommath/bn_s_mp_mul_high_digs.c ../libtommath/bn_s_mp_mul_high_digs_fast.c ../libtommath/bn_s_mp_rand_platform.c ../libtommath/bn_s_mp_sqr.c ../libtommath/bn_s_mp_sqr_fast.c ../libtommath/bn_s_mp_sub.c ../libtommath/bn_s_mp_toom_mul.c ../libtommath/bn_s_mp_toom_sqr.c  '
+HEADERS='abs.h arg.h array.h binding.h bool.h buf.h buf_file.h buf_inspect.h buf_inspect_s16.h buf_inspect_s16_binary.h buf_inspect_s16_decimal.h buf_inspect_s16_hexadecimal.h buf_inspect_s16_octal.h buf_inspect_s32.h buf_inspect_s32_binary.h buf_inspect_s32_decimal.h buf_inspect_s32_hexadecimal.h buf_inspect_s32_octal.h buf_inspect_s64.h buf_inspect_s64_binary.h buf_inspect_s64_decimal.h buf_inspect_s64_hexadecimal.h buf_inspect_s64_octal.h buf_inspect_s8.h buf_inspect_s8_binary.h buf_inspect_s8_decimal.h buf_inspect_s8_hexadecimal.h buf_inspect_s8_octal.h buf_inspect_sw.h buf_inspect_sw_binary.h buf_inspect_sw_decimal.h buf_inspect_sw_hexadecimal.h buf_inspect_sw_octal.h buf_inspect_u16.h buf_inspect_u16_binary.h buf_inspect_u16_decimal.h buf_inspect_u16_hexadecimal.h buf_inspect_u16_octal.h buf_inspect_u32.h buf_inspect_u32_binary.h buf_inspect_u32_decimal.h buf_inspect_u32_hexadecimal.h buf_inspect_u32_octal.h buf_inspect_u64.h buf_inspect_u64_binary.h buf_inspect_u64_decimal.h buf_inspect_u64_hexadecimal.h buf_inspect_u64_octal.h buf_inspect_u8.h buf_inspect_u8_binary.h buf_inspect_u8_decimal.h buf_inspect_u8_hexadecimal.h buf_inspect_u8_octal.h buf_inspect_uw.h buf_inspect_uw_binary.h buf_inspect_uw_decimal.h buf_inspect_uw_hexadecimal.h buf_inspect_uw_octal.h buf_parse.h buf_parse_s16.h buf_parse_s32.h buf_parse_s64.h buf_parse_s8.h buf_parse_sw.h buf_parse_u16.h buf_parse_u32.h buf_parse_u64.h buf_parse_u8.h buf_parse_uw.h buf_save.h c3.h c3_main.h call.h ceiling.h cfn.h character.h compare.h config.h env.h error.h error_handler.h eval.h f32.h f64.h fact.h facts.h facts_cursor.h facts_spec.h facts_spec_cursor.h facts_with.h facts_with_cursor.h file.h float.h fn.h fn_clause.h frame.h hash.h ident.h integer.h io.h list.h list_init.h log.h map.h module.h operator.h ptag.h quote.h s16.h s32.h s64.h s8.h sequence.h set__fact.h set__tag.h set_cursor__fact.h set_cursor__tag.h set_item__fact.h set_item__tag.h sha1.h sign.h skiplist__fact.h skiplist_node__fact.h str.h struct.h struct_type.h sw.h sym.h tag.h tag_init.h tag_type.h time.h tuple.h type.h types.h u16.h u32.h u64.h u8.h ucd.h uw.h var.h '
+SOURCES='abs.c arg.c array.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_inspect_s16.c buf_inspect_s16_binary.c buf_inspect_s16_decimal.c buf_inspect_s16_hexadecimal.c buf_inspect_s16_octal.c buf_inspect_s32.c buf_inspect_s32_binary.c buf_inspect_s32_decimal.c buf_inspect_s32_hexadecimal.c buf_inspect_s32_octal.c buf_inspect_s64.c buf_inspect_s64_binary.c buf_inspect_s64_decimal.c buf_inspect_s64_hexadecimal.c buf_inspect_s64_octal.c buf_inspect_s8.c buf_inspect_s8_binary.c buf_inspect_s8_decimal.c buf_inspect_s8_hexadecimal.c buf_inspect_s8_octal.c buf_inspect_sw.c buf_inspect_sw_binary.c buf_inspect_sw_decimal.c buf_inspect_sw_hexadecimal.c buf_inspect_sw_octal.c buf_inspect_u16.c buf_inspect_u16_binary.c buf_inspect_u16_decimal.c buf_inspect_u16_hexadecimal.c buf_inspect_u16_octal.c buf_inspect_u32.c buf_inspect_u32_binary.c buf_inspect_u32_decimal.c buf_inspect_u32_hexadecimal.c buf_inspect_u32_octal.c buf_inspect_u64.c buf_inspect_u64_binary.c buf_inspect_u64_decimal.c buf_inspect_u64_hexadecimal.c buf_inspect_u64_octal.c buf_inspect_u8.c buf_inspect_u8_binary.c buf_inspect_u8_decimal.c buf_inspect_u8_hexadecimal.c buf_inspect_u8_octal.c buf_inspect_uw.c buf_inspect_uw_binary.c buf_inspect_uw_decimal.c buf_inspect_uw_hexadecimal.c buf_inspect_uw_octal.c buf_parse.c buf_parse_s16.c buf_parse_s32.c buf_parse_s64.c buf_parse_s8.c buf_parse_sw.c buf_parse_u16.c buf_parse_u32.c buf_parse_u64.c buf_parse_u8.c buf_parse_uw.c buf_save.c c3.c call.c ceiling.c cfn.c character.c compare.c env.c error.c error_handler.c eval.c f32.c f64.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c file.c fn.c fn_clause.c frame.c hash.c ident.c integer.c io.c license.c list.c list_init.c log.c map.c module.c operator.c ptag.c quote.c s16.c s32.c s64.c s8.c sequence.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c sign.c skiplist__fact.c skiplist_node__fact.c str.c struct.c sw.c sym.c tag.c tag_add.c tag_band.c tag_bor.c tag_bxor.c tag_div.c tag_init.c tag_mod.c tag_mul.c tag_shift_left.c tag_shift_right.c tag_sub.c tag_type.c time.c tuple.c type.c u16.c u32.c u64.c u8.c ucd.c uw.c var.c '
+LO_SOURCES='abs.c arg.c array.c binding.c bool.c buf.c buf_file.c buf_inspect.c buf_inspect_s16.c buf_inspect_s16_binary.c buf_inspect_s16_decimal.c buf_inspect_s16_hexadecimal.c buf_inspect_s16_octal.c buf_inspect_s32.c buf_inspect_s32_binary.c buf_inspect_s32_decimal.c buf_inspect_s32_hexadecimal.c buf_inspect_s32_octal.c buf_inspect_s64.c buf_inspect_s64_binary.c buf_inspect_s64_decimal.c buf_inspect_s64_hexadecimal.c buf_inspect_s64_octal.c buf_inspect_s8.c buf_inspect_s8_binary.c buf_inspect_s8_decimal.c buf_inspect_s8_hexadecimal.c buf_inspect_s8_octal.c buf_inspect_sw.c buf_inspect_sw_binary.c buf_inspect_sw_decimal.c buf_inspect_sw_hexadecimal.c buf_inspect_sw_octal.c buf_inspect_u16.c buf_inspect_u16_binary.c buf_inspect_u16_decimal.c buf_inspect_u16_hexadecimal.c buf_inspect_u16_octal.c buf_inspect_u32.c buf_inspect_u32_binary.c buf_inspect_u32_decimal.c buf_inspect_u32_hexadecimal.c buf_inspect_u32_octal.c buf_inspect_u64.c buf_inspect_u64_binary.c buf_inspect_u64_decimal.c buf_inspect_u64_hexadecimal.c buf_inspect_u64_octal.c buf_inspect_u8.c buf_inspect_u8_binary.c buf_inspect_u8_decimal.c buf_inspect_u8_hexadecimal.c buf_inspect_u8_octal.c buf_inspect_uw.c buf_inspect_uw_binary.c buf_inspect_uw_decimal.c buf_inspect_uw_hexadecimal.c buf_inspect_uw_octal.c buf_parse.c buf_parse_s16.c buf_parse_s32.c buf_parse_s64.c buf_parse_s8.c buf_parse_sw.c buf_parse_u16.c buf_parse_u32.c buf_parse_u64.c buf_parse_u8.c buf_parse_uw.c buf_save.c c3.c call.c ceiling.c cfn.c character.c compare.c env.c error.c error_handler.c eval.c f32.c f64.c fact.c facts.c facts_cursor.c facts_spec.c facts_spec_cursor.c facts_with.c facts_with_cursor.c file.c fn.c fn_clause.c frame.c hash.c ident.c integer.c io.c license.c list.c list_init.c log.c map.c module.c operator.c ptag.c quote.c s16.c s32.c s64.c s8.c sequence.c set__fact.c set__tag.c set_cursor__fact.c set_cursor__tag.c set_item__fact.c set_item__tag.c sign.c skiplist__fact.c skiplist_node__fact.c str.c struct.c sw.c sym.c tag.c tag_add.c tag_band.c tag_bor.c tag_bxor.c tag_div.c tag_init.c tag_mod.c tag_mul.c tag_shift_left.c tag_shift_right.c tag_sub.c tag_type.c time.c tuple.c type.c u16.c u32.c u64.c u8.c ucd.c uw.c var.c ../libtommath/bn_cutoffs.c ../libtommath/bn_mp_2expt.c ../libtommath/bn_mp_abs.c ../libtommath/bn_mp_add.c ../libtommath/bn_mp_add_d.c ../libtommath/bn_mp_and.c ../libtommath/bn_mp_clamp.c ../libtommath/bn_mp_clear.c ../libtommath/bn_mp_clear_multi.c ../libtommath/bn_mp_cmp.c ../libtommath/bn_mp_cmp_d.c ../libtommath/bn_mp_cmp_mag.c ../libtommath/bn_mp_cnt_lsb.c ../libtommath/bn_mp_complement.c ../libtommath/bn_mp_copy.c ../libtommath/bn_mp_count_bits.c ../libtommath/bn_mp_div.c ../libtommath/bn_mp_div_2.c ../libtommath/bn_mp_div_2d.c ../libtommath/bn_mp_div_3.c ../libtommath/bn_mp_div_d.c ../libtommath/bn_mp_dr_is_modulus.c ../libtommath/bn_mp_dr_reduce.c ../libtommath/bn_mp_dr_setup.c ../libtommath/bn_mp_error_to_string.c ../libtommath/bn_mp_exch.c ../libtommath/bn_mp_exptmod.c ../libtommath/bn_mp_gcd.c ../libtommath/bn_mp_get_double.c ../libtommath/bn_mp_get_i32.c ../libtommath/bn_mp_get_i64.c ../libtommath/bn_mp_get_mag_u32.c ../libtommath/bn_mp_get_mag_u64.c ../libtommath/bn_mp_grow.c ../libtommath/bn_mp_init.c ../libtommath/bn_mp_init_copy.c ../libtommath/bn_mp_init_multi.c ../libtommath/bn_mp_init_size.c ../libtommath/bn_mp_invmod.c ../libtommath/bn_mp_lcm.c ../libtommath/bn_mp_lshd.c ../libtommath/bn_mp_mod.c ../libtommath/bn_mp_mod_2d.c ../libtommath/bn_mp_montgomery_calc_normalization.c ../libtommath/bn_mp_montgomery_reduce.c ../libtommath/bn_mp_montgomery_setup.c ../libtommath/bn_mp_mul.c ../libtommath/bn_mp_mul_2.c ../libtommath/bn_mp_mul_2d.c ../libtommath/bn_mp_mul_d.c ../libtommath/bn_mp_mulmod.c ../libtommath/bn_mp_neg.c ../libtommath/bn_mp_or.c ../libtommath/bn_mp_radix_size.c ../libtommath/bn_mp_reduce.c ../libtommath/bn_mp_reduce_2k.c ../libtommath/bn_mp_reduce_2k_l.c ../libtommath/bn_mp_reduce_2k_setup.c ../libtommath/bn_mp_reduce_2k_setup_l.c ../libtommath/bn_mp_reduce_is_2k.c ../libtommath/bn_mp_reduce_is_2k_l.c ../libtommath/bn_mp_reduce_setup.c ../libtommath/bn_mp_rshd.c ../libtommath/bn_mp_set.c ../libtommath/bn_mp_set_double.c ../libtommath/bn_mp_set_i32.c ../libtommath/bn_mp_set_i64.c ../libtommath/bn_mp_set_l.c ../libtommath/bn_mp_set_u32.c ../libtommath/bn_mp_set_u64.c ../libtommath/bn_mp_set_ul.c ../libtommath/bn_mp_sqr.c ../libtommath/bn_mp_sqrt.c ../libtommath/bn_mp_sub.c ../libtommath/bn_mp_sub_d.c ../libtommath/bn_mp_xor.c ../libtommath/bn_mp_zero.c ../libtommath/bn_s_mp_add.c ../libtommath/bn_s_mp_balance_mul.c ../libtommath/bn_s_mp_exptmod.c ../libtommath/bn_s_mp_exptmod_fast.c ../libtommath/bn_s_mp_invmod_fast.c ../libtommath/bn_s_mp_invmod_slow.c ../libtommath/bn_s_mp_karatsuba_mul.c ../libtommath/bn_s_mp_karatsuba_sqr.c ../libtommath/bn_s_mp_montgomery_reduce_fast.c ../libtommath/bn_s_mp_mul_digs.c ../libtommath/bn_s_mp_mul_digs_fast.c ../libtommath/bn_s_mp_mul_high_digs.c ../libtommath/bn_s_mp_mul_high_digs_fast.c ../libtommath/bn_s_mp_rand_platform.c ../libtommath/bn_s_mp_sqr.c ../libtommath/bn_s_mp_sqr_fast.c ../libtommath/bn_s_mp_sub.c ../libtommath/bn_s_mp_toom_mul.c ../libtommath/bn_s_mp_toom_sqr.c  '
diff --git a/libc3/window/Makefile b/libc3/window/Makefile
index ab9e96f..3d58339 100644
--- a/libc3/window/Makefile
+++ b/libc3/window/Makefile
@@ -44,6 +44,12 @@ demo: build
 demo_debug: debug
 	if ${HAVE_CAIRO}; then ${MAKE} -C cairo demo_debug; fi
 
+demo_gl: build
+	if ${HAVE_SDL2}; then ${MAKE} -C sdl2 demo; fi
+
+demo_gl_debug: debug
+	if ${HAVE_SDL2}; then ${MAKE} -C sdl2 demo_debug; fi
+
 distclean:
 	if ${HAVE_CAIRO}; then ${MAKE} -C cairo distclean; fi
 
@@ -53,6 +59,9 @@ gcovr:
 gdb_demo: debug
 	if ${HAVE_CAIRO}; then ${MAKE} -C cairo gdb_demo; fi
 
+gdb_demo_gl: debug
+	if ${HAVE_SDL2}; then ${MAKE} -C sdl2 gdb_demo; fi
+
 install:
 	${INSTALL} -o ${OWNER} -g ${GROUP} -m 0755 -d ${prefix}/include/libc3/window
 	${LIBTOOL} --tag=CC --mode=install ${INSTALL} -o ${OWNER} -g ${GROUP} -m 0644 ${HEADERS} ${prefix}/include/libc3/window
@@ -64,6 +73,9 @@ install:
 lldb_demo: debug
 	if ${HAVE_CAIRO}; then ${MAKE} -C cairo lldb_demo; fi
 
+lldb_demo_gl: debug
+	if ${HAVE_SDL2}; then ${MAKE} -C sdl2 lldb_demo; fi
+
 test:
 	if ${HAVE_CAIRO}; then ${MAKE} -C cairo test; fi
 
diff --git a/libc3/window/cairo/quartz/demo/Makefile b/libc3/window/cairo/quartz/demo/Makefile
index b46f877..a775c59 100644
--- a/libc3/window/cairo/quartz/demo/Makefile
+++ b/libc3/window/cairo/quartz/demo/Makefile
@@ -92,7 +92,8 @@ install:
 	debug \
 	demo \
 	distclean \
-	gdb_demo
+	gdb_demo \
+	lldb_demo
 
 include config.mk
 include sources.mk
diff --git a/libc3/window/sdl2/demo/Makefile b/libc3/window/sdl2/demo/Makefile
index 6565300..ff2167c 100644
--- a/libc3/window/sdl2/demo/Makefile
+++ b/libc3/window/sdl2/demo/Makefile
@@ -20,6 +20,7 @@ DISTCLEANFILES = ${CLEANFILES} config.mk
 
 build:
 	${MAKE} ${PROG}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos build; fi
 
 all:
 	${MAKE} build
@@ -27,34 +28,52 @@ all:
 	${MAKE} debug
 	if ${HAVE_ASAN}; then ${MAKE} asan; fi
 
-asan: ${PROG_ASAN}
+asan:
+	${MAKE} ${PROG_ASAN}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos asan; fi
 
 clean:
 	rm -rf ${CLEANFILES}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos clean; fi
 
 clean_cov:
 	rm -rf ${CLEANFILES_COV}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos clean_cov; fi
 
-cov:   ${PROG_COV}
+cov:
+	${MAKE} ${PROG_COV}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos cov; fi
 
-debug: ${PROG_DEBUG}
+debug:
+	${MAKE} ${PROG_DEBUG}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos debug; fi
 
-demo: ${PROG}
-	time ./${PROG}
+demo:
+	${MAKE} ${PROG}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos demo; else time ./${PROG}; fi
+
+demo_debug:
+	${MAKE} debug
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos demo_debug; else time ./${PROG_DEBUG}; fi
 
 distclean:
 	rm -rf ${DISTCLEANFILES}
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos distclean; fi
 
 gcovr:
 	gcovr --gcov-executable ${GCOV} --html-details ${PROG}.html
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos gcovr; fi
 
 gdb_demo: debug
-	if [ -f ${PROG_DEBUG}.core ]; then gdb .libs/${PROG_DEBUG} ${PROG_DEBUG}.core; else gdb .libs/${PROG_DEBUG}; fi
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos gdb_demo; else gdb .libs/${PROG_DEBUG}; fi
 
 install:
 	install -m 755 -d ${prefix}/bin
 	install -m 755 ${PROG} ${prefix}/bin/${PROG}
 
+lldb_demo: debug
+	if ${HAVE_DARWIN}; then ${MAKE} -C macos lldb_demo; else lldb .libs/${PROG_DEBUG}; fi
+
 .PHONY: \
 	all \
 	asan \
@@ -66,7 +85,8 @@ install:
 	demo \
 	distclean \
 	gdb_demo \
-	install
+	install \
+	lldb_demo
 
 include config.mk
 include sources.mk
diff --git a/libc3/window/sdl2/demo/bg_rect.c b/libc3/window/sdl2/demo/bg_rect.c
index 7c6256e..e0284a0 100644
--- a/libc3/window/sdl2/demo/bg_rect.c
+++ b/libc3/window/sdl2/demo/bg_rect.c
@@ -27,6 +27,7 @@ bool bg_rect_render (s_sequence *seq, s_window_sdl2 *window,
                      SDL_GLContext context)
 {
   (void) context;
+  (void) window;
 #define BG_RECT_COLOR_MAX 8
   const s_rgb color[BG_RECT_COLOR_MAX] = {
     {1, 1, 1},
@@ -50,7 +51,7 @@ bool bg_rect_render (s_sequence *seq, s_window_sdl2 *window,
   rgb.r = color[c1].r * q + color[c2].r * p;
   rgb.g = color[c1].g * q + color[c2].g * p;
   rgb.b = color[c1].b * q + color[c2].b * p;
-  glColor3d(rgb.r, rgb.g, rgb.b);
-  glRectd(0, 0, window->w, window->h);
+  glClearColor(rgb.r, rgb.g, rgb.b, 1.0);
+  glClear(GL_COLOR_BUFFER_BIT);
   return true;
 }
diff --git a/libc3/window/sdl2/demo/c3_window_sdl2_demo b/libc3/window/sdl2/demo/c3_window_sdl2_demo
deleted file mode 100755
index 43522bc..0000000
--- a/libc3/window/sdl2/demo/c3_window_sdl2_demo
+++ /dev/null
@@ -1,210 +0,0 @@
-#! /bin/sh
-
-# c3_window_sdl2_demo - temporary wrapper script for .libs/c3_window_sdl2_demo
-# Generated by libtool (GNU libtool) 2.4.7
-#
-# The c3_window_sdl2_demo program cannot be directly executed until all the libtool
-# libraries that it depends on are installed.
-#
-# This wrapper script should never be moved out of the build directory.
-# If it is, it will not operate correctly.
-
-# Sed substitution that helps us do robust quoting.  It backslashifies
-# metacharacters that are still active within double-quoted strings.
-sed_quote_subst='s|\([`"$\\]\)|\\\1|g'
-
-# Be Bourne compatible
-if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
-  emulate sh
-  NULLCMD=:
-  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
-  # is contrary to our usage.  Disable this feature.
-  alias -g '${1+"$@"}'='"$@"'
-  setopt NO_GLOB_SUBST
-else
-  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
-fi
-BIN_SH=xpg4; export BIN_SH # for Tru64
-DUALCASE=1; export DUALCASE # for MKS sh
-
-# The HP-UX ksh and POSIX shell print the target directory to stdout
-# if CDPATH is set.
-(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
-
-relink_command=""
-
-# This environment variable determines our operation mode.
-if test "$libtool_install_magic" = "%%%MAGIC variable%%%"; then
-  # install mode needs the following variables:
-  generated_by_libtool_version='2.4.7'
-  notinst_deplibs=' ../../../libc3.la ../../libc3_window.la ../libc3_window_sdl2.la /Users/thodg/c/thodg/c3-lang/c3/libc3/window/libc3_window.la /Users/thodg/c/thodg/c3-lang/c3/libc3/libc3.la /Users/thodg/c/thodg/c3-lang/c3/libffi/libffi.la'
-else
-  # When we are sourced in execute mode, $file and $ECHO are already set.
-  if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
-    file="$0"
-
-# A function that is used when there is no print builtin or printf.
-func_fallback_echo ()
-{
-  eval 'cat <<_LTECHO_EOF
-$1
-_LTECHO_EOF'
-}
-    ECHO="printf %s\\n"
-  fi
-
-# Very basic option parsing. These options are (a) specific to
-# the libtool wrapper, (b) are identical between the wrapper
-# /script/ and the wrapper /executable/ that is used only on
-# windows platforms, and (c) all begin with the string --lt-
-# (application programs are unlikely to have options that match
-# this pattern).
-#
-# There are only two supported options: --lt-debug and
-# --lt-dump-script. There is, deliberately, no --lt-help.
-#
-# The first argument to this parsing function should be the
-# script's /opt/homebrew/bin/glibtool value, followed by no.
-lt_option_debug=
-func_parse_lt_options ()
-{
-  lt_script_arg0=$0
-  shift
-  for lt_opt
-  do
-    case "$lt_opt" in
-    --lt-debug) lt_option_debug=1 ;;
-    --lt-dump-script)
-        lt_dump_D=`$ECHO "X$lt_script_arg0" | /usr/bin/sed -e 's/^X//' -e 's%/[^/]*$%%'`
-        test "X$lt_dump_D" = "X$lt_script_arg0" && lt_dump_D=.
-        lt_dump_F=`$ECHO "X$lt_script_arg0" | /usr/bin/sed -e 's/^X//' -e 's%^.*/%%'`
-        cat "$lt_dump_D/$lt_dump_F"
-        exit 0
-      ;;
-    --lt-*)
-        $ECHO "Unrecognized --lt- option: '$lt_opt'" 1>&2
-        exit 1
-      ;;
-    esac
-  done
-
-  # Print the debug banner immediately:
-  if test -n "$lt_option_debug"; then
-    echo "c3_window_sdl2_demo:c3_window_sdl2_demo:$LINENO: libtool wrapper (GNU libtool) 2.4.7" 1>&2
-  fi
-}
-
-# Used when --lt-debug. Prints its arguments to stdout
-# (redirection is the responsibility of the caller)
-func_lt_dump_args ()
-{
-  lt_dump_args_N=1;
-  for lt_arg
-  do
-    $ECHO "c3_window_sdl2_demo:c3_window_sdl2_demo:$LINENO: newargv[$lt_dump_args_N]: $lt_arg"
-    lt_dump_args_N=`expr $lt_dump_args_N + 1`
-  done
-}
-
-# Core function for launching the target application
-func_exec_program_core ()
-{
-
-      if test -n "$lt_option_debug"; then
-        $ECHO "c3_window_sdl2_demo:c3_window_sdl2_demo:$LINENO: newargv[0]: $progdir/$program" 1>&2
-        func_lt_dump_args ${1+"$@"} 1>&2
-      fi
-      exec "$progdir/$program" ${1+"$@"}
-
-      $ECHO "$0: cannot exec $program $*" 1>&2
-      exit 1
-}
-
-# A function to encapsulate launching the target application
-# Strips options in the --lt-* namespace from $@ and
-# launches target application with the remaining arguments.
-func_exec_program ()
-{
-  case " $* " in
-  *\ --lt-*)
-    for lt_wr_arg
-    do
-      case $lt_wr_arg in
-      --lt-*) ;;
-      *) set x "$@" "$lt_wr_arg"; shift;;
-      esac
-      shift
-    done ;;
-  esac
-  func_exec_program_core ${1+"$@"}
-}
-
-  # Parse options
-  func_parse_lt_options "$0" ${1+"$@"}
-
-  # Find the directory that this script lives in.
-  thisdir=`$ECHO "$file" | /usr/bin/sed 's%/[^/]*$%%'`
-  test "x$thisdir" = "x$file" && thisdir=.
-
-  # Follow symbolic links until we get to the real thisdir.
-  file=`ls -ld "$file" | /usr/bin/sed -n 's/.*-> //p'`
-  while test -n "$file"; do
-    destdir=`$ECHO "$file" | /usr/bin/sed 's%/[^/]*$%%'`
-
-    # If there was a directory component, then change thisdir.
-    if test "x$destdir" != "x$file"; then
-      case "$destdir" in
-      [\\/]* | [A-Za-z]:[\\/]*) thisdir="$destdir" ;;
-      *) thisdir="$thisdir/$destdir" ;;
-      esac
-    fi
-
-    file=`$ECHO "$file" | /usr/bin/sed 's%^.*/%%'`
-    file=`ls -ld "$thisdir/$file" | /usr/bin/sed -n 's/.*-> //p'`
-  done
-
-  # Usually 'no', except on cygwin/mingw when embedded into
-  # the cwrapper.
-  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=no
-  if test "$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR" = "yes"; then
-    # special case for '.'
-    if test "$thisdir" = "."; then
-      thisdir=`pwd`
-    fi
-    # remove .libs from thisdir
-    case "$thisdir" in
-    *[\\/].libs ) thisdir=`$ECHO "$thisdir" | /usr/bin/sed 's%[\\/][^\\/]*$%%'` ;;
-    .libs )   thisdir=. ;;
-    esac
-  fi
-
-  # Try to get the absolute directory name.
-  absdir=`cd "$thisdir" && pwd`
-  test -n "$absdir" && thisdir="$absdir"
-
-  program='c3_window_sdl2_demo'
-  progdir="$thisdir/.libs"
-
-
-  if test -f "$progdir/$program"; then
-    # Add our own library path to DYLD_LIBRARY_PATH
-    DYLD_LIBRARY_PATH="/Users/thodg/c/thodg/c3-lang/c3/libc3/.libs:/Users/thodg/c/thodg/c3-lang/c3/libc3/window/.libs:/Users/thodg/c/thodg/c3-lang/c3/libc3/window/sdl2/.libs:/Users/thodg/c/thodg/c3-lang/c3/libffi/.libs:$DYLD_LIBRARY_PATH"
-
-    # Some systems cannot cope with colon-terminated DYLD_LIBRARY_PATH
-    # The second colon is a workaround for a bug in BeOS R4 sed
-    DYLD_LIBRARY_PATH=`$ECHO "$DYLD_LIBRARY_PATH" | /usr/bin/sed 's/::*$//'`
-
-    export DYLD_LIBRARY_PATH
-
-    if test "$libtool_execute_magic" != "%%%MAGIC variable%%%"; then
-      # Run the actual program with our arguments.
-      func_exec_program ${1+"$@"}
-    fi
-  else
-    # The program doesn't exist.
-    $ECHO "$0: error: '$progdir/$program' does not exist" 1>&2
-    $ECHO "This script is just a wrapper for $program." 1>&2
-    $ECHO "See the libtool documentation for more information." 1>&2
-    exit 1
-  fi
-fi
diff --git a/libc3/window/sdl2/demo/configure b/libc3/window/sdl2/demo/configure
index d62b277..39666bc 100755
--- a/libc3/window/sdl2/demo/configure
+++ b/libc3/window/sdl2/demo/configure
@@ -140,4 +140,14 @@ for SRC in $SOURCES; do
     echo "	${LIBTOOL} --tag=CC --mode=compile \${CC} \${CPPFLAGS} \${CFLAGS_DEBUG} -c $SRC -o $SRC_DEBUG_LO" >> ${CONFIG_MK}
 done
 
+echo "" >> ${CONFIG_MK}
+
+if [ "x$(uname)" = "xDarwin" ]; then
+    HAVE_DARWIN=true
+    (cd macos && ./configure; )
+else
+    HAVE_DARWIN=false
+fi
+echo "HAVE_DARWIN = $HAVE_DARWIN" >> ${CONFIG_MK}
+
 update_config_mk
diff --git a/libc3/window/sdl2/demo/macos/Makefile b/libc3/window/sdl2/demo/macos/Makefile
new file mode 100644
index 0000000..21edfcb
--- /dev/null
+++ b/libc3/window/sdl2/demo/macos/Makefile
@@ -0,0 +1,97 @@
+## c3
+## Copyright 2022,2023 kmx.io <contact@kmx.io>
+##
+## Permission is hereby granted to use this software granted the above
+## copyright notice and this permission paragraph are included in all
+## copies and substantial portions of this software.
+##
+## THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
+## PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
+## AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
+## THIS SOFTWARE.
+
+CLEANFILES = *.a ${APP_PROG} ${APP_PROG_ASAN} ${APP_PROG_COV} \
+	${APP_PROG_DEBUG} ${PROG} ${PROG_ASAN} ${PROG_COV} ${PROG_DEBUG} \
+	*.css *.gcno *.html *.o .libs *.lo
+
+CLEANFILES_COV = *.css *.gcda *.html .libs/*.gcda
+CLEANFILES += ${CLEANFILES_COV}
+
+DISTCLEANFILES = ${CLEANFILES} config.mk
+
+IMG_SOURCES = \
+	../../../../../img/flaps.png \
+	../../../../../img/fly-dead.png \
+	../../../../../img/fly-noto.png \
+	../../../../../img/toast.png \
+
+build:
+	${MAKE} ${APP_PROG}
+	${MAKE} ${APP}/Contents/Frameworks
+	rsync -aP --delete ../../../../../lib ${APP}/Contents/
+	rsync -aP ${IMG_SOURCES} ${APP}/Contents/img/
+
+all:
+	${MAKE} build
+	if ${HAVE_GCOV}; then ${MAKE} cov; fi
+	${MAKE} debug
+	if ${HAVE_ASAN}; then ${MAKE} asan; fi
+
+asan:
+	${MAKE} ${APP_PROG_ASAN}
+	${MAKE} ${APP_ASAN}/Contents/Frameworks
+	rsync -aP --delete ../../../../../lib ${APP_ASAN}/Contents/
+	rsync -aP ${IMG_SOURCES} ${APP_ASAN}/Contents/img/
+
+clean:
+	rm -rf ${CLEANFILES}
+
+clean_cov:
+	rm -rf ${CLEANFILES_COV}
+
+cov:
+	${MAKE} ${APP_PROG_COV}
+	${MAKE} ${APP_COV}/Contents/Frameworks
+	rsync -aP --delete ../../../../../lib ${APP_COV}/Contents/
+	rsync -aP ${IMG_SOURCES} ${APP_COV}/Contents/img/
+
+debug:
+	${MAKE} ${APP_PROG_DEBUG}
+	${MAKE} ${APP_DEBUG}/Contents/Frameworks
+	rsync -aP --delete ../../../../../lib ${APP_DEBUG}/Contents/
+	rsync -aP ${IMG_SOURCES} ${APP_DEBUG}/Contents/img/
+
+demo: build
+	time ${APP_PROG}
+
+demo_debug: debug
+	time ${APP_PROG_DEBUG}
+
+distclean:
+	rm -rf ${DISTCLEANFILES}
+
+gcovr:
+	gcovr --gcov-executable ${GCOV} --html-details ${PROG}.html
+
+gdb_demo: debug
+	if [ -f ${PROG_DEBUG}.core ]; then gdb .libs/${PROG_DEBUG} ${PROG_DEBUG}.core; else gdb .libs/${PROG_DEBUG}; fi
+
+lldb_demo: debug
+	lldb ${APP_PROG_DEBUG}
+
+install:
+	install -m 755 -d ${prefix}/bin
+	install -m 755 ${PROG} ${prefix}/bin/${PROG}
+
+.PHONY: \
+	all \
+	asan \
+	clean \
+	clean_cov \
+	cov \
+	debug \
+	demo \
+	distclean \
+	gdb_demo
+
+include config.mk
diff --git a/libc3/window/sdl2/demo/macos/configure b/libc3/window/sdl2/demo/macos/configure
new file mode 100755
index 0000000..6cff1fa
--- /dev/null
+++ b/libc3/window/sdl2/demo/macos/configure
@@ -0,0 +1,130 @@
+#!/bin/sh
+## c3
+## Copyright 2022,2023 kmx.io <contact@kmx.io>
+##
+## Permission is hereby granted to use this software granted the above
+## copyright notice and this permission paragraph are included in all
+## copies and substantial portions of this software.
+##
+## THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
+## PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
+## AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
+## THIS SOFTWARE.
+
+set -e
+
+export SRC_TOP="$(dirname "$PWD")"
+
+. ../../../../../config.subr
+
+PROG=c3_window_sdl2_demo
+PROG_ASAN=c3_window_sdl2_demo_asan
+PROG_COV=c3_window_sdl2_demo_cov
+PROG_DEBUG=c3_window_sdl2_demo_debug
+
+echo "PROG = $PROG" >> ${CONFIG_MK}
+echo "PROG_ASAN = $PROG_ASAN" >> ${CONFIG_MK}
+echo "PROG_COV = $PROG_COV" >> ${CONFIG_MK}
+echo "PROG_DEBUG = $PROG_DEBUG" >> ${CONFIG_MK}
+
+APP=c3_window_sdl2_demo.app
+APP_ASAN=c3_window_sdl2_demo_asan.app
+APP_COV=c3_window_sdl2_demo_cov.app
+APP_DEBUG=c3_window_sdl2_demo_debug.app
+
+echo "APP = $APP" >> ${CONFIG_MK}
+echo "APP_ASAN = ${APP_ASAN}" >> ${CONFIG_MK}
+echo "APP_COV = ${APP_COV}" >> ${CONFIG_MK}
+echo "APP_DEBUG = ${APP_DEBUG}" >> ${CONFIG_MK}
+
+APP_PROG=${APP}/Contents/MacOS/${PROG}
+APP_PROG_ASAN=${APP_ASAN}/Contents/MacOS/${PROG_ASAN}
+APP_PROG_COV=${APP_COV}/Contents/MacOS/${PROG_COV}
+APP_PROG_DEBUG=${APP_DEBUG}/Contents/MacOS/${PROG_DEBUG}
+
+echo "APP_PROG = $APP_PROG" >> ${CONFIG_MK}
+echo "APP_PROG_ASAN = $APP_PROG_ASAN" >> ${CONFIG_MK}
+echo "APP_PROG_COV = $APP_PROG_COV" >> ${CONFIG_MK}
+echo "APP_PROG_DEBUG = $APP_PROG_DEBUG" >> ${CONFIG_MK}
+
+echo >> ${CONFIG_MK}
+echo "${APP_PROG}: ../.libs/${PROG}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP}/Contents/MacOS" >> ${CONFIG_MK}
+echo "	cp ../.libs/${PROG} ${APP_PROG}" >> ${CONFIG_MK}
+
+BUNDLE_LIBS="../../../../../libffi/.libs/libffi.8.dylib ../../../../.libs/libc3.0.dylib ../../../.libs/libc3_window.0.dylib ../../.libs/libc3_window_sdl2.0.dylib"
+echo >> ${CONFIG_MK}
+echo "${APP}/Contents/Frameworks: ${BUNDLE_LIBS}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP}/Contents/Frameworks" >> ${CONFIG_MK}
+echo "	cp ${BUNDLE_LIBS} ${APP}/Contents/Frameworks/" >> ${CONFIG_MK}
+for BUNDLE_LIB in ${BUNDLE_LIBS}; do
+    L=$(basename $BUNDLE_LIB)
+    echo "	install_name_tool -id @executable_path/../Frameworks/ ${APP}/Contents/Frameworks/$L" >> ${CONFIG_MK}
+    echo "	install_name_tool -change ${LIBDIR}/$L @executable_path/../Frameworks/$L ${APP}/Contents/MacOS/${PROG}" >> ${CONFIG_MK}
+    echo "	DEPS=\$\$(otool -L '${BUNDLE_LIB}' | awk '/^\t.+(\/usr\/lib|\/System)/ { next } /^\t/ { print \$\$1 }'); for DEP in \$\${DEPS}; do D=\$\$(basename \"\$\${DEP}\"); if [ -f ${APP}/Contents/Frameworks/\$\$D ]; then install_name_tool -change \$\${DEP} @executable_path/../Frameworks/\$\$D ${APP}/Contents/Frameworks/$L; fi; done" >> ${CONFIG_MK}
+done
+echo >> ${CONFIG_MK}
+echo ".PHONY: \\" >> ${CONFIG_MK}
+echo "	${APP}/Contents/Frameworks" >> ${CONFIG_MK}
+
+echo >> ${CONFIG_MK}
+echo "${APP_PROG_ASAN}: ../.libs/${PROG_ASAN}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP_ASAN}/Contents/MacOS" >> ${CONFIG_MK}
+echo "	cp ../.libs/${PROG_ASAN} ${APP_PROG_ASAN}" >> ${CONFIG_MK}
+
+BUNDLE_LIBS_ASAN="../../../../../libffi/.libs/libffi.8.dylib ../../../../.libs/libc3_asan.0.dylib ../../../.libs/libc3_window_asan.0.dylib ../../.libs/libc3_window_sdl2_asan.0.dylib"
+echo >> ${CONFIG_MK}
+echo "${APP_ASAN}/Contents/Frameworks: ${BUNDLE_LIBS_ASAN}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP_ASAN}/Contents/Frameworks" >> ${CONFIG_MK}
+echo "	cp ${BUNDLE_LIBS_ASAN} ${APP_ASAN}/Contents/Frameworks/" >> ${CONFIG_MK}
+for BUNDLE_LIB in ${BUNDLE_LIBS_ASAN}; do
+    L=$(basename $BUNDLE_LIB)
+    echo "	install_name_tool -id @executable_path/../Frameworks/ ${APP_ASAN}/Contents/Frameworks/$L" >> ${CONFIG_MK}
+    echo "	install_name_tool -change ${LIBDIR}/$L @executable_path/../Frameworks/$L ${APP_ASAN}/Contents/MacOS/${PROG_ASAN}" >> ${CONFIG_MK}
+    echo "	DEPS=\$\$(otool -L '${BUNDLE_LIB}' | awk '/^\t.+(\/usr\/lib|\/System)/ { next } /^\t/ { print \$\$1 }'); for DEP in \$\${DEPS}; do D=\$\$(basename \"\$\${DEP}\"); if [ -f ${APP_ASAN}/Contents/Frameworks/\$\$D ]; then install_name_tool -change \$\${DEP} @executable_path/../Frameworks/\$\$D ${APP_ASAN}/Contents/Frameworks/$L; fi; done" >> ${CONFIG_MK}
+done
+echo >> ${CONFIG_MK}
+echo ".PHONY: \\" >> ${CONFIG_MK}
+echo "	${APP_ASAN}/Contents/Frameworks" >> ${CONFIG_MK}
+
+echo >> ${CONFIG_MK}
+echo "${APP_PROG_COV}: ../.libs/${PROG_COV}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP_COV}/Contents/MacOS" >> ${CONFIG_MK}
+echo "	cp ../.libs/${PROG_COV} ${APP_PROG_COV}" >> ${CONFIG_MK}
+
+BUNDLE_LIBS_COV="../../../../../libffi/.libs/libffi.8.dylib ../../../../.libs/libc3_cov.0.dylib ../../../.libs/libc3_window_cov.0.dylib ../../.libs/libc3_window_sdl2_cov.0.dylib"
+echo >> ${CONFIG_MK}
+echo "${APP_COV}/Contents/Frameworks: ${BUNDLE_LIBS_COV}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP_COV}/Contents/Frameworks" >> ${CONFIG_MK}
+echo "	cp ${BUNDLE_LIBS_COV} ${APP_COV}/Contents/Frameworks/" >> ${CONFIG_MK}
+for BUNDLE_LIB in ${BUNDLE_LIBS_COV}; do
+    L=$(basename $BUNDLE_LIB)
+    echo "	install_name_tool -id @executable_path/../Frameworks/ ${APP_COV}/Contents/Frameworks/$L" >> ${CONFIG_MK}
+    echo "	install_name_tool -change ${LIBDIR}/$L @executable_path/../Frameworks/$L ${APP_COV}/Contents/MacOS/${PROG}" >> ${CONFIG_MK}
+    echo "	DEPS=\$\$(otool -L '${BUNDLE_LIB}' | awk '/^\t.+(\/usr\/lib|\/System)/ { next } /^\t/ { print \$\$1 }'); for DEP in \$\${DEPS}; do D=\$\$(basename \"\$\${DEP}\"); if [ -f ${APP_COV}/Contents/Frameworks/\$\$D ]; then install_name_tool -change \$\${DEP} @executable_path/../Frameworks/\$\$D ${APP_COV}/Contents/Frameworks/$L; fi; done" >> ${CONFIG_MK}
+done
+echo >> ${CONFIG_MK}
+echo ".PHONY: \\" >> ${CONFIG_MK}
+echo "	${APP_COV}/Contents/Frameworks" >> ${CONFIG_MK}
+
+echo >> ${CONFIG_MK}
+echo "${APP_PROG_DEBUG}: ../.libs/${PROG_DEBUG}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP_DEBUG}/Contents/MacOS" >> ${CONFIG_MK}
+echo "	cp ../.libs/${PROG_DEBUG} ${APP_PROG_DEBUG}" >> ${CONFIG_MK}
+
+BUNDLE_LIBS_DEBUG="../../../../../libffi/.libs/libffi.8.dylib ../../../../.libs/libc3_debug.0.dylib ../../../.libs/libc3_window_debug.0.dylib ../../.libs/libc3_window_sdl2_debug.0.dylib"
+echo >> ${CONFIG_MK}
+echo "${APP_DEBUG}/Contents/Frameworks: ${BUNDLE_LIBS_DEBUG}" >> ${CONFIG_MK}
+echo "	mkdir -p ${APP_DEBUG}/Contents/Frameworks" >> ${CONFIG_MK}
+echo "	cp ${BUNDLE_LIBS_DEBUG} ${APP_DEBUG}/Contents/Frameworks/" >> ${CONFIG_MK}
+for BUNDLE_LIB in ${BUNDLE_LIBS_DEBUG}; do
+    L=$(basename $BUNDLE_LIB)
+    echo "	install_name_tool -id @executable_path/../Frameworks/ ${APP_DEBUG}/Contents/Frameworks/$L" >> ${CONFIG_MK}
+    echo "	install_name_tool -change ${LIBDIR}/$L @executable_path/../Frameworks/$L ${APP_DEBUG}/Contents/MacOS/${PROG_DEBUG}" >> ${CONFIG_MK}
+    echo "	DEPS=\$\$(otool -L '${BUNDLE_LIB}' | awk '/^\t.+(\/usr\/lib|\/System)/ { next } /^\t/ { print \$\$1 }'); for DEP in \$\${DEPS}; do D=\$\$(basename \"\$\${DEP}\"); if [ -f ${APP_DEBUG}/Contents/Frameworks/\$\$D ]; then install_name_tool -change \$\${DEP} @executable_path/../Frameworks/\$\$D ${APP_DEBUG}/Contents/Frameworks/$L; fi; done" >> ${CONFIG_MK}
+done
+echo >> ${CONFIG_MK}
+echo ".PHONY: \\" >> ${CONFIG_MK}
+echo "	${APP_DEBUG}/Contents/Frameworks" >> ${CONFIG_MK}
+
+update_config_mk
diff --git a/libc3/window/sdl2/demo/window_sdl2_demo.c b/libc3/window/sdl2/demo/window_sdl2_demo.c
index 3189a79..0d12e80 100644
--- a/libc3/window/sdl2/demo/window_sdl2_demo.c
+++ b/libc3/window/sdl2/demo/window_sdl2_demo.c
@@ -17,7 +17,7 @@
 #include "../window_sdl2.h"
 #include "bg_rect.h"
 
-#define WINDOW_SDL2_DEMO_SEQUENCE_COUNT 0
+#define WINDOW_SDL2_DEMO_SEQUENCE_COUNT 1
 
 static bool window_sdl2_demo_button (s_window_sdl2 *window, u8 button,
                                      sw x, sw y);
@@ -25,7 +25,7 @@ static bool window_sdl2_demo_key (s_window_sdl2 *window,
                                   SDL_Keysym *keysym);
 static bool window_sdl2_demo_load (s_window_sdl2 *window);
 static bool window_sdl2_demo_render (s_window_sdl2 *window,
-                                     SDL_GLContext context);
+                                     void *context);
 bool window_sdl2_demo_resize (s_window_sdl2 *window,
                               uw w, uw h);
 
@@ -37,8 +37,8 @@ int main (int argc, char **argv)
     return 1;
   }
   window_sdl2_init(&window, 0, 0, 800, 600,
-                    "C3.Window.SDL2 demo",
-                    WINDOW_SDL2_DEMO_SEQUENCE_COUNT);
+                   "C3.Window.SDL2 demo",
+                   WINDOW_SDL2_DEMO_SEQUENCE_COUNT);
   window.button = window_sdl2_demo_button;
   window.key    = window_sdl2_demo_key;
   window.load   = window_sdl2_demo_load;
@@ -102,8 +102,8 @@ bool window_sdl2_demo_load (s_window_sdl2 *window)
     return false;
   }
   window_sdl2_sequence_init(window->sequence, 8.0,
-                             "01. Background rectangles",
-                             bg_rect_load, bg_rect_render);
+                            "01. Background rectangles",
+                            bg_rect_load, bg_rect_render);
   /*
   window_sdl2_sequence_init(window->sequence + 1, 20.0,
                             "02. Lightspeed",
@@ -136,7 +136,7 @@ bool window_sdl2_demo_load (s_window_sdl2 *window)
 }
 
 bool window_sdl2_demo_render (s_window_sdl2 *window,
-                              SDL_GLContext context)
+                              void *context)
 {
   s_sequence *seq;
   assert(window);
diff --git a/libc3/window/sdl2/types.h b/libc3/window/sdl2/types.h
index 2045f38..8d0608f 100644
--- a/libc3/window/sdl2/types.h
+++ b/libc3/window/sdl2/types.h
@@ -46,18 +46,18 @@ typedef bool (*f_window_sdl2_motion) (s_window_sdl2 *window, sw x,
 
 /* return false to break event loop */
 typedef bool (*f_window_sdl2_render) (s_window_sdl2 *window,
-                                      SDL_GLContext context);
+                                      void *context);
 
 /* return false to break event loop */
 typedef bool (*f_window_sdl2_resize) (s_window_sdl2 *window,
                                        uw w, uw h);
 
 typedef bool (*f_window_sdl2_sequence_load) (s_sequence *seq,
-                                              s_window_sdl2 *window);
+                                             s_window_sdl2 *window);
 
 typedef bool (*f_window_sdl2_sequence_render) (s_sequence *seq,
                                                s_window_sdl2 *window,
-                                               SDL_GLContext context);
+                                               void *context);
 
 struct rgb {
   double r;
@@ -83,7 +83,7 @@ struct window_sdl2 {
   f_window_sdl2_load   load;
   f_window_sdl2_motion motion;
   f_window_sdl2_render render;
-  SDL_GLContext        context;
+  void                *context;
   f_window_sdl2_resize resize;
   s_sequence          *sequence;
   uw                   sequence_count;
diff --git a/libc3/window/sdl2/window_sdl2.c b/libc3/window/sdl2/window_sdl2.c
index 96b9bd2..9941b99 100644
--- a/libc3/window/sdl2/window_sdl2.c
+++ b/libc3/window/sdl2/window_sdl2.c
@@ -36,6 +36,7 @@ s_window_sdl2 * window_sdl2_init (s_window_sdl2 *window,
   window->render = window_sdl2_render_default;
   window->resize = window_sdl2_resize_default;
   window->context = NULL;
+  window->sdl_window = NULL;
   window->sequence = calloc(sequence_count, sizeof(s_sequence));
   window->sequence_count = sequence_count;
   window->sequence_pos = 0;
@@ -87,7 +88,7 @@ bool window_sdl2_motion_default (s_window_sdl2 *window, sw x, sw y)
 }
 
 bool window_sdl2_render_default (s_window_sdl2 *window,
-                                 SDL_GLContext context)
+                                 void *context)
 {
   (void) window;
   (void) context;
@@ -110,6 +111,7 @@ bool window_sdl2_run (s_window_sdl2 *window)
 {
   int quit = 0;
   SDL_Event sdl_event;
+  SDL_GLContext context;
   assert(window);
   if (! g_window_sdl2_initialized) {
     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
@@ -129,13 +131,17 @@ bool window_sdl2_run (s_window_sdl2 *window)
           SDL_GetError());
     return false;
   }
-  window->context = SDL_GL_CreateContext(window->sdl_window);
-  if (! window->context) {
+  context = SDL_GL_CreateContext(window->sdl_window);
+  if (! context) {
     warnx("window_sdl2_run: failed to create OpenGL context: %s",
           SDL_GetError());
     return false;
   }
   SDL_GL_SetSwapInterval(1);
+  if (! window->load(window)) {
+    warnx("window_sdl2_run: window->load => false");
+    quit = 1;
+  }
   while (! quit) {
     while (SDL_PollEvent(&sdl_event) != 0) {
       switch (sdl_event.type) {
@@ -180,8 +186,10 @@ bool window_sdl2_run (s_window_sdl2 *window)
         break;
       }
     }
-    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
-    glClear(GL_COLOR_BUFFER_BIT);
+    if (! window->render(window, window->context)) {
+      warnx("window_sdl2_run: window->render -> false");
+      quit = 1;
+    }
     SDL_GL_SwapWindow(window->sdl_window);
   }
   SDL_GL_DeleteContext(window->context);
diff --git a/libc3/window/sdl2/window_sdl2.h b/libc3/window/sdl2/window_sdl2.h
index f9cdf9e..596023f 100644
--- a/libc3/window/sdl2/window_sdl2.h
+++ b/libc3/window/sdl2/window_sdl2.h
@@ -33,7 +33,7 @@ bool window_sdl2_key_default (s_window_sdl2 *window, SDL_Keysym *keysym);
 bool window_sdl2_load_default (s_window_sdl2 *window);
 bool window_sdl2_motion_default (s_window_sdl2 *window, sw x, sw y);
 bool window_sdl2_render_default (s_window_sdl2 *window,
-                                 SDL_GLContext context);
+                                 void *context);
 bool window_sdl2_resize_default (s_window_sdl2 *window, uw w, uw h);
 
 #endif /* LIBC3_WINDOW_SDL2_H */
diff --git a/sources.mk b/sources.mk
index e9ea051..b12f443 100644
--- a/sources.mk
+++ b/sources.mk
@@ -25,6 +25,11 @@ C3_CONFIGURES = \
 	libc3/window/cairo/win32/demo/update_sources \
 	libc3/window/cairo/win32/configure \
 	libc3/window/cairo/win32/update_sources \
+	libc3/window/sdl2/demo/macos/configure \
+	libc3/window/sdl2/demo/configure \
+	libc3/window/sdl2/demo/update_sources \
+	libc3/window/sdl2/configure \
+	libc3/window/sdl2/update_sources \
 	libtommath/configure \
 	libtommath/update_sources \
 	test/configure \
@@ -46,6 +51,9 @@ C3_MAKEFILES = \
 	libc3/window/cairo/quartz/Makefile \
 	libc3/window/cairo/win32/demo/Makefile \
 	libc3/window/cairo/win32/Makefile \
+	libc3/window/sdl2/demo/macos/Makefile \
+	libc3/window/sdl2/demo/Makefile \
+	libc3/window/sdl2/Makefile \
 	libtommath/Makefile \
 	test/Makefile \
 	ucd2c/Makefile \
@@ -92,6 +100,7 @@ C3_C_SOURCES = \
 	libc3/tag_add.c \
 	libc3/buf_inspect_s32_hexadecimal.h \
 	libc3/ceiling.h \
+	libc3/struct_type.h \
 	libc3/list.c \
 	libc3/buf_inspect_u64.c \
 	libc3/facts.h \
@@ -305,6 +314,12 @@ C3_C_SOURCES = \
 	libc3/window/cairo/win32/window_cairo_win32.c \
 	libc3/window/cairo/cairo_sprite.c \
 	libc3/window/cairo/cairo_png.c \
+	libc3/window/sdl2/demo/window_sdl2_demo.c \
+	libc3/window/sdl2/demo/bg_rect.h \
+	libc3/window/sdl2/demo/bg_rect.c \
+	libc3/window/sdl2/window_sdl2.c \
+	libc3/window/sdl2/types.h \
+	libc3/window/sdl2/window_sdl2.h \
 	libc3/window/window.c \
 	libc3/ident.h \
 	libc3/buf_inspect_s64_decimal.c \
@@ -374,6 +389,7 @@ C3_C_SOURCES = \
 	libc3/buf_inspect_s16.h \
 	libc3/integer.h \
 	libc3/buf_file.c \
+	libc3/struct.c \
 	libc3/s64.c \
 	libc3/buf_inspect_s32_binary.c \
 	libc3/buf_inspect_u8.h \
diff --git a/sources.sh b/sources.sh
index 150f482..af18173 100644
--- a/sources.sh
+++ b/sources.sh
@@ -1,4 +1,4 @@
 # sources.sh generated by update_sources
-C3_CONFIGURES='c3c/configure c3s/configure c3s/update_sources ic3/configure ic3/update_sources libc3/configure libc3/update_sources libc3/window/configure libc3/window/update_sources libc3/window/cairo/demo/configure libc3/window/cairo/demo/update_sources libc3/window/cairo/xcb/demo/configure libc3/window/cairo/xcb/demo/update_sources libc3/window/cairo/xcb/configure libc3/window/cairo/xcb/update_sources libc3/window/cairo/configure libc3/window/cairo/update_sources libc3/window/cairo/quartz/demo/configure libc3/window/cairo/quartz/demo/update_sources libc3/window/cairo/quartz/configure libc3/window/cairo/quartz/update_sources libc3/window/cairo/win32/demo/configure libc3/window/cairo/win32/demo/update_sources libc3/window/cairo/win32/configure libc3/window/cairo/win32/update_sources libtommath/configure libtommath/update_sources test/configure test/update_sources ucd2c/configure '
-C3_MAKEFILES='c3c/Makefile c3s/Makefile ic3/Makefile libc3/Makefile libc3/gen.mk libc3/window/Makefile libc3/window/cairo/demo/Makefile libc3/window/cairo/xcb/demo/Makefile libc3/window/cairo/xcb/Makefile libc3/window/cairo/Makefile libc3/window/cairo/quartz/demo/Makefile libc3/window/cairo/quartz/Makefile libc3/window/cairo/win32/demo/Makefile libc3/window/cairo/win32/Makefile libtommath/Makefile test/Makefile ucd2c/Makefile '
-C3_C_SOURCES='c3c/c3c.c c3s/buf_readline.c c3s/c3s.c c3s/buf_readline.h ic3/buf_linenoise.h ic3/ic3.c ic3/linenoise.c ic3/buf_linenoise.c libc3/buf_inspect_s_base.c.in libc3/type.h libc3/fact.c libc3/time.h libc3/fn.h libc3/s16.h libc3/buf_inspect_s8_octal.h libc3/log.c libc3/error.h libc3/buf_inspect_u64_octal.h libc3/set_item.h.in libc3/compare.c libc3/buf_inspect_s8_binary.h libc3/buf_inspect_uw_hexadecimal.h libc3/uw.c libc3/eval.c libc3/set__fact.c libc3/sym.h libc3/env.h libc3/cfn.c libc3/buf_inspect_u16_octal.h libc3/u.h.in libc3/buf_parse_s16.c libc3/s8.h libc3/quote.h libc3/buf_inspect_s32.h libc3/buf_inspect.c libc3/buf_parse_u.h.in libc3/skiplist_node__fact.h libc3/skiplist__fact.c libc3/tag_add.c libc3/buf_inspect_s32_hexadecimal.h libc3/ceiling.h libc3/list.c libc3/buf_inspect_u64.c libc3/facts.h libc3/tag_type.h libc3/buf_inspect_u16_decimal.c libc3/tag_sub.c libc3/facts_with_cursor.c libc3/buf_inspect_sw_decimal.c libc3/facts_cursor.c libc3/buf_inspect_u64_binary.h libc3/buf_inspect_sw_hexadecimal.h libc3/buf_inspect_s32_decimal.h libc3/u16.h libc3/buf_inspect_s64_octal.h libc3/buf_inspect_u8_binary.h libc3/buf_inspect_s8.h libc3/buf_inspect_s16_octal.h libc3/ucd.c libc3/buf_inspect_s16_binary.h libc3/tuple.c libc3/buf_inspect_uw_octal.h libc3/buf_parse_u8.c libc3/tag.h libc3/float.h libc3/buf_inspect_u_base.c.in libc3/buf_parse_u16.c libc3/buf_inspect_u16_hexadecimal.h libc3/buf_inspect_s8_decimal.c libc3/buf_inspect_u32.h libc3/array.c libc3/buf_parse_sw.h libc3/set.h.in libc3/s.c.in libc3/buf_parse_s.c.in libc3/map.h libc3/skiplist.h.in libc3/set__tag.h libc3/buf_inspect_s64.c libc3/io.c libc3/set_item__tag.c libc3/sequence.c libc3/types.h libc3/buf_inspect_uw.c libc3/buf_inspect_u32_binary.c libc3/buf_inspect_s64_decimal.h libc3/set_cursor.c.in libc3/ident.c libc3/buf_inspect_s64_hexadecimal.c libc3/bool.h libc3/s.h.in libc3/set.c.in libc3/skiplist.c.in libc3/operator.h libc3/fn_clause.h libc3/buf_parse_s.h.in libc3/buf_inspect_s16.c libc3/binding.c libc3/ptag.h libc3/buf_parse_s32.h libc3/tag_bor.c libc3/var.h libc3/tag_shift_left.c libc3/set_item__fact.h libc3/u8.c libc3/set_cursor.h.in libc3/f32.c libc3/buf_inspect_sw_octal.h libc3/c3.h libc3/arg.h libc3/buf_inspect_u8_hexadecimal.c libc3/buf_inspect_u32_hexadecimal.h libc3/buf_parse_u64.c libc3/module.c libc3/frame.h libc3/buf_inspect_s16_decimal.c libc3/file.h libc3/sw.h libc3/s32.c libc3/error_handler.c libc3/str.c libc3/buf_parse.h libc3/buf_inspect_uw_binary.c libc3/buf_inspect_uw_decimal.h libc3/facts_spec_cursor.c libc3/tag_init.c libc3/u64.h libc3/buf_inspect_u_base.h.in libc3/buf_inspect_s32_octal.h libc3/f64.h libc3/buf_inspect_u8_octal.h libc3/buf_inspect_s64_binary.c libc3/buf_inspect_u64_hexadecimal.c libc3/buf_inspect_u16_binary.c libc3/buf_save.h libc3/buf_inspect_u16.c libc3/buf_inspect_s8_hexadecimal.c libc3/u.c.in libc3/buf_inspect_sw.h libc3/facts_with.c libc3/buf_parse_u.c.in libc3/buf_parse_u32.h libc3/set_cursor__fact.c libc3/buf.h libc3/set_cursor__tag.h libc3/buf_inspect_s16_hexadecimal.h libc3/buf_inspect_u32_decimal.h libc3/buf_parse_uw.c libc3/buf_parse_s64.c libc3/abs.h libc3/list_init.c libc3/buf_inspect_sw_binary.c libc3/buf_parse_s8.h libc3/call.h libc3/sign.c libc3/buf_inspect_u8_decimal.h libc3/character.h libc3/buf_inspect_u64_decimal.h libc3/buf_inspect_s_base.h.in libc3/buf_inspect_u32_octal.h libc3/u32.c libc3/hash.c libc3/buf_file.h libc3/struct.h libc3/integer.c libc3/buf_inspect_u8.c libc3/facts_spec.c libc3/buf_inspect_s32_binary.h libc3/set_item.c.in libc3/tag_bxor.c libc3/s64.h libc3/buf_inspect_u16_decimal.h libc3/tag_type.c libc3/facts.c libc3/buf_inspect_u64.h libc3/buf_inspect_sw_decimal.h libc3/facts_with_cursor.h libc3/skiplist_node__fact.c libc3/buf_inspect.h libc3/quote.c libc3/buf_inspect_s32.c libc3/skiplist_node.h.in libc3/s8.c libc3/buf_parse_s16.h libc3/list.h libc3/ceiling.c libc3/buf_inspect_s.h.in libc3/buf_inspect_s32_hexadecimal.c libc3/skiplist__fact.h libc3/uw.h libc3/buf_inspect_uw_hexadecimal.c libc3/buf_inspect_s8_binary.c libc3/tag_mod.c libc3/compare.h libc3/buf_inspect_u64_octal.c libc3/buf_inspect_u16_octal.c libc3/tag_band.c libc3/cfn.h libc3/env.c libc3/set__fact.h libc3/sym.c libc3/eval.h libc3/c3_main.h libc3/buf_inspect_s8_octal.c libc3/s16.c libc3/fn.c libc3/time.c libc3/fact.h libc3/type.c libc3/error.c libc3/log.h libc3/sequence.h libc3/set_item__tag.h libc3/io.h libc3/buf_inspect_s64.h libc3/buf_inspect_s64_hexadecimal.h libc3/window/types.h libc3/window/window.h libc3/window/cairo/demo/toasters.h libc3/window/cairo/demo/window_cairo_demo.c libc3/window/cairo/demo/lightspeed.h libc3/window/cairo/demo/flies.h libc3/window/cairo/demo/bg_rect.h libc3/window/cairo/demo/window_cairo_demo.h libc3/window/cairo/demo/toasters.c libc3/window/cairo/demo/lightspeed.c libc3/window/cairo/demo/flies.c libc3/window/cairo/demo/bg_rect.c libc3/window/cairo/xcb/demo/window_cairo_xcb_demo.c libc3/window/cairo/xcb/window_cairo_xcb.h libc3/window/cairo/xcb/config.h libc3/window/cairo/xcb/window_cairo_xcb.c libc3/window/cairo/types.h libc3/window/cairo/window_cairo.c libc3/window/cairo/cairo_font.h libc3/window/cairo/cairo_png.h libc3/window/cairo/cairo_sprite.h libc3/window/cairo/quartz/demo/window_cairo_quartz_demo.c libc3/window/cairo/quartz/window_cairo_quartz_view_controller.h libc3/window/cairo/quartz/quartz_to_xkbcommon.c libc3/window/cairo/quartz/window_cairo_quartz.h libc3/window/cairo/quartz/window_cairo_quartz_app_delegate.h libc3/window/cairo/quartz/quartz_to_xkbcommon.h libc3/window/cairo/quartz/xkbquartz.h libc3/window/cairo/quartz/window_cairo_quartz_view.h libc3/window/cairo/window_cairo.h libc3/window/cairo/cairo_font.c libc3/window/cairo/win32/demo/window_cairo_win32_demo.c libc3/window/cairo/win32/vk_to_xkbcommon.c libc3/window/cairo/win32/window_cairo_win32.h libc3/window/cairo/win32/vk_to_xkbcommon.h libc3/window/cairo/win32/window_cairo_win32.c libc3/window/cairo/cairo_sprite.c libc3/window/cairo/cairo_png.c libc3/window/window.c libc3/ident.h libc3/buf_inspect_s64_decimal.c libc3/buf_inspect_u32_binary.h libc3/buf_inspect_uw.h libc3/buf_inspect_u.c.in libc3/buf_parse_sw.c libc3/array.h libc3/buf_inspect_u32.c libc3/buf_inspect_s8_decimal.h libc3/buf_inspect_u16_hexadecimal.c libc3/buf_parse_u16.h libc3/set__tag.c libc3/map.c libc3/tag_shift_right.c libc3/tag.c libc3/buf_parse_u8.h libc3/buf_inspect_uw_octal.c libc3/buf_inspect_u8_binary.c libc3/tag_div.c libc3/buf_inspect_s64_octal.c libc3/u16.c libc3/buf_inspect_sw_hexadecimal.c libc3/buf_inspect_s32_decimal.c libc3/buf_inspect_u64_binary.c libc3/facts_cursor.h libc3/tuple.h libc3/buf_inspect_s16_binary.c libc3/ucd.h libc3/buf_inspect_s16_octal.c libc3/buf_inspect_s8.c libc3/sha1.h libc3/buf_inspect_uw_binary.h libc3/buf_parse.c libc3/str.h libc3/error_handler.h libc3/u64.c libc3/buf_inspect_s32_octal.c libc3/tag_init.h libc3/tag_mul.c libc3/facts_spec_cursor.h libc3/buf_inspect_uw_decimal.c libc3/sw.c libc3/file.c libc3/buf_inspect_s16_decimal.h libc3/frame.c libc3/s32.h libc3/c3.c libc3/f32.h libc3/buf_inspect_sw_octal.c libc3/u8.h libc3/set_item__fact.c libc3/var.c libc3/module.h libc3/license.c libc3/buf_inspect_u32_hexadecimal.c libc3/buf_parse_u64.h libc3/buf_inspect_u8_hexadecimal.h libc3/arg.c libc3/fn_clause.c libc3/operator.c libc3/bool.c libc3/buf_parse_s32.c libc3/ptag.c libc3/binding.h libc3/buf_inspect_u.h.in libc3/buf_inspect_s16.h libc3/integer.h libc3/buf_file.c libc3/s64.c libc3/buf_inspect_s32_binary.c libc3/buf_inspect_u8.h libc3/facts_spec.h libc3/buf_inspect_u8_decimal.c libc3/sign.h libc3/call.c libc3/buf_parse_s8.c libc3/buf_inspect_sw_binary.h libc3/hash.h libc3/u32.h libc3/buf_inspect_u32_octal.c libc3/character.c libc3/buf_inspect_u64_decimal.c libc3/buf_parse_uw.h libc3/buf_inspect_u32_decimal.c libc3/buf_inspect_s16_hexadecimal.c libc3/set_cursor__tag.c libc3/set_cursor__fact.h libc3/buf.c libc3/list_init.h libc3/abs.c libc3/buf_parse_s64.h libc3/buf_inspect_s.c.in libc3/buf_inspect_s64_binary.h libc3/buf_inspect_u8_octal.c libc3/f64.c libc3/skiplist_node.c.in libc3/buf_parse_u32.c libc3/facts_with.h libc3/buf_inspect_sw.c libc3/buf_inspect_u16.h libc3/buf_inspect_s8_hexadecimal.h libc3/buf_inspect_u16_binary.h libc3/buf_inspect_u64_hexadecimal.h libc3/buf_save.c test/ident_test.c test/buf_parse_test_s16.c test/buf_inspect_test.c test/libc3_test.c test/fn_test.c test/buf_parse_test_u16.c test/str_test.c test/cfn_test.c test/character_test.c test/buf_parse_test_s8.c test/skiplist__fact_test.c test/sym_test.c test/tag_test.h test/buf_file_test.c test/bool_test.c test/fact_test.h test/buf_parse_test_u64.c test/compare_test.c test/facts_with_test.c test/array_test.c test/buf_parse_test.h test/test.h test/buf_parse_test_su.h test/env_test.c test/buf_parse_test_s64.c test/types_test.c test/hash_test.c test/call_test.c test/set__tag_test.c test/facts_test.c test/facts_cursor_test.c test/compare_test.h test/buf_parse_test_s32.c test/test.c test/buf_parse_test.c test/fact_test.c test/tag_test.c test/set__fact_test.c test/buf_parse_test_u32.c test/buf_test.c test/list_test.c test/buf_parse_test_u8.c test/tuple_test.c ucd2c/ucd.h ucd2c/ucd2c.c '
+C3_CONFIGURES='c3c/configure c3s/configure c3s/update_sources ic3/configure ic3/update_sources libc3/configure libc3/update_sources libc3/window/configure libc3/window/update_sources libc3/window/cairo/demo/configure libc3/window/cairo/demo/update_sources libc3/window/cairo/xcb/demo/configure libc3/window/cairo/xcb/demo/update_sources libc3/window/cairo/xcb/configure libc3/window/cairo/xcb/update_sources libc3/window/cairo/configure libc3/window/cairo/update_sources libc3/window/cairo/quartz/demo/configure libc3/window/cairo/quartz/demo/update_sources libc3/window/cairo/quartz/configure libc3/window/cairo/quartz/update_sources libc3/window/cairo/win32/demo/configure libc3/window/cairo/win32/demo/update_sources libc3/window/cairo/win32/configure libc3/window/cairo/win32/update_sources libc3/window/sdl2/demo/macos/configure libc3/window/sdl2/demo/configure libc3/window/sdl2/demo/update_sources libc3/window/sdl2/configure libc3/window/sdl2/update_sources libtommath/configure libtommath/update_sources test/configure test/update_sources ucd2c/configure '
+C3_MAKEFILES='c3c/Makefile c3s/Makefile ic3/Makefile libc3/Makefile libc3/gen.mk libc3/window/Makefile libc3/window/cairo/demo/Makefile libc3/window/cairo/xcb/demo/Makefile libc3/window/cairo/xcb/Makefile libc3/window/cairo/Makefile libc3/window/cairo/quartz/demo/Makefile libc3/window/cairo/quartz/Makefile libc3/window/cairo/win32/demo/Makefile libc3/window/cairo/win32/Makefile libc3/window/sdl2/demo/macos/Makefile libc3/window/sdl2/demo/Makefile libc3/window/sdl2/Makefile libtommath/Makefile test/Makefile ucd2c/Makefile '
+C3_C_SOURCES='c3c/c3c.c c3s/buf_readline.c c3s/c3s.c c3s/buf_readline.h ic3/buf_linenoise.h ic3/ic3.c ic3/linenoise.c ic3/buf_linenoise.c libc3/buf_inspect_s_base.c.in libc3/type.h libc3/fact.c libc3/time.h libc3/fn.h libc3/s16.h libc3/buf_inspect_s8_octal.h libc3/log.c libc3/error.h libc3/buf_inspect_u64_octal.h libc3/set_item.h.in libc3/compare.c libc3/buf_inspect_s8_binary.h libc3/buf_inspect_uw_hexadecimal.h libc3/uw.c libc3/eval.c libc3/set__fact.c libc3/sym.h libc3/env.h libc3/cfn.c libc3/buf_inspect_u16_octal.h libc3/u.h.in libc3/buf_parse_s16.c libc3/s8.h libc3/quote.h libc3/buf_inspect_s32.h libc3/buf_inspect.c libc3/buf_parse_u.h.in libc3/skiplist_node__fact.h libc3/skiplist__fact.c libc3/tag_add.c libc3/buf_inspect_s32_hexadecimal.h libc3/ceiling.h libc3/struct_type.h libc3/list.c libc3/buf_inspect_u64.c libc3/facts.h libc3/tag_type.h libc3/buf_inspect_u16_decimal.c libc3/tag_sub.c libc3/facts_with_cursor.c libc3/buf_inspect_sw_decimal.c libc3/facts_cursor.c libc3/buf_inspect_u64_binary.h libc3/buf_inspect_sw_hexadecimal.h libc3/buf_inspect_s32_decimal.h libc3/u16.h libc3/buf_inspect_s64_octal.h libc3/buf_inspect_u8_binary.h libc3/buf_inspect_s8.h libc3/buf_inspect_s16_octal.h libc3/ucd.c libc3/buf_inspect_s16_binary.h libc3/tuple.c libc3/buf_inspect_uw_octal.h libc3/buf_parse_u8.c libc3/tag.h libc3/float.h libc3/buf_inspect_u_base.c.in libc3/buf_parse_u16.c libc3/buf_inspect_u16_hexadecimal.h libc3/buf_inspect_s8_decimal.c libc3/buf_inspect_u32.h libc3/array.c libc3/buf_parse_sw.h libc3/set.h.in libc3/s.c.in libc3/buf_parse_s.c.in libc3/map.h libc3/skiplist.h.in libc3/set__tag.h libc3/buf_inspect_s64.c libc3/io.c libc3/set_item__tag.c libc3/sequence.c libc3/types.h libc3/buf_inspect_uw.c libc3/buf_inspect_u32_binary.c libc3/buf_inspect_s64_decimal.h libc3/set_cursor.c.in libc3/ident.c libc3/buf_inspect_s64_hexadecimal.c libc3/bool.h libc3/s.h.in libc3/set.c.in libc3/skiplist.c.in libc3/operator.h libc3/fn_clause.h libc3/buf_parse_s.h.in libc3/buf_inspect_s16.c libc3/binding.c libc3/ptag.h libc3/buf_parse_s32.h libc3/tag_bor.c libc3/var.h libc3/tag_shift_left.c libc3/set_item__fact.h libc3/u8.c libc3/set_cursor.h.in libc3/f32.c libc3/buf_inspect_sw_octal.h libc3/c3.h libc3/arg.h libc3/buf_inspect_u8_hexadecimal.c libc3/buf_inspect_u32_hexadecimal.h libc3/buf_parse_u64.c libc3/module.c libc3/frame.h libc3/buf_inspect_s16_decimal.c libc3/file.h libc3/sw.h libc3/s32.c libc3/error_handler.c libc3/str.c libc3/buf_parse.h libc3/buf_inspect_uw_binary.c libc3/buf_inspect_uw_decimal.h libc3/facts_spec_cursor.c libc3/tag_init.c libc3/u64.h libc3/buf_inspect_u_base.h.in libc3/buf_inspect_s32_octal.h libc3/f64.h libc3/buf_inspect_u8_octal.h libc3/buf_inspect_s64_binary.c libc3/buf_inspect_u64_hexadecimal.c libc3/buf_inspect_u16_binary.c libc3/buf_save.h libc3/buf_inspect_u16.c libc3/buf_inspect_s8_hexadecimal.c libc3/u.c.in libc3/buf_inspect_sw.h libc3/facts_with.c libc3/buf_parse_u.c.in libc3/buf_parse_u32.h libc3/set_cursor__fact.c libc3/buf.h libc3/set_cursor__tag.h libc3/buf_inspect_s16_hexadecimal.h libc3/buf_inspect_u32_decimal.h libc3/buf_parse_uw.c libc3/buf_parse_s64.c libc3/abs.h libc3/list_init.c libc3/buf_inspect_sw_binary.c libc3/buf_parse_s8.h libc3/call.h libc3/sign.c libc3/buf_inspect_u8_decimal.h libc3/character.h libc3/buf_inspect_u64_decimal.h libc3/buf_inspect_s_base.h.in libc3/buf_inspect_u32_octal.h libc3/u32.c libc3/hash.c libc3/buf_file.h libc3/struct.h libc3/integer.c libc3/buf_inspect_u8.c libc3/facts_spec.c libc3/buf_inspect_s32_binary.h libc3/set_item.c.in libc3/tag_bxor.c libc3/s64.h libc3/buf_inspect_u16_decimal.h libc3/tag_type.c libc3/facts.c libc3/buf_inspect_u64.h libc3/buf_inspect_sw_decimal.h libc3/facts_with_cursor.h libc3/skiplist_node__fact.c libc3/buf_inspect.h libc3/quote.c libc3/buf_inspect_s32.c libc3/skiplist_node.h.in libc3/s8.c libc3/buf_parse_s16.h libc3/list.h libc3/ceiling.c libc3/buf_inspect_s.h.in libc3/buf_inspect_s32_hexadecimal.c libc3/skiplist__fact.h libc3/uw.h libc3/buf_inspect_uw_hexadecimal.c libc3/buf_inspect_s8_binary.c libc3/tag_mod.c libc3/compare.h libc3/buf_inspect_u64_octal.c libc3/buf_inspect_u16_octal.c libc3/tag_band.c libc3/cfn.h libc3/env.c libc3/set__fact.h libc3/sym.c libc3/eval.h libc3/c3_main.h libc3/buf_inspect_s8_octal.c libc3/s16.c libc3/fn.c libc3/time.c libc3/fact.h libc3/type.c libc3/error.c libc3/log.h libc3/sequence.h libc3/set_item__tag.h libc3/io.h libc3/buf_inspect_s64.h libc3/buf_inspect_s64_hexadecimal.h libc3/window/types.h libc3/window/window.h libc3/window/cairo/demo/toasters.h libc3/window/cairo/demo/window_cairo_demo.c libc3/window/cairo/demo/lightspeed.h libc3/window/cairo/demo/flies.h libc3/window/cairo/demo/bg_rect.h libc3/window/cairo/demo/window_cairo_demo.h libc3/window/cairo/demo/toasters.c libc3/window/cairo/demo/lightspeed.c libc3/window/cairo/demo/flies.c libc3/window/cairo/demo/bg_rect.c libc3/window/cairo/xcb/demo/window_cairo_xcb_demo.c 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libc3/character.c libc3/buf_inspect_u64_decimal.c libc3/buf_parse_uw.h libc3/buf_inspect_u32_decimal.c libc3/buf_inspect_s16_hexadecimal.c libc3/set_cursor__tag.c libc3/set_cursor__fact.h libc3/buf.c libc3/list_init.h libc3/abs.c libc3/buf_parse_s64.h libc3/buf_inspect_s.c.in libc3/buf_inspect_s64_binary.h libc3/buf_inspect_u8_octal.c libc3/f64.c libc3/skiplist_node.c.in libc3/buf_parse_u32.c libc3/facts_with.h libc3/buf_inspect_sw.c libc3/buf_inspect_u16.h libc3/buf_inspect_s8_hexadecimal.h libc3/buf_inspect_u16_binary.h libc3/buf_inspect_u64_hexadecimal.h libc3/buf_save.c test/ident_test.c test/buf_parse_test_s16.c test/buf_inspect_test.c test/libc3_test.c test/fn_test.c test/buf_parse_test_u16.c test/str_test.c test/cfn_test.c test/character_test.c test/buf_parse_test_s8.c test/skiplist__fact_test.c test/sym_test.c test/tag_test.h test/buf_file_test.c test/bool_test.c test/fact_test.h test/buf_parse_test_u64.c test/compare_test.c test/facts_with_test.c test/array_test.c test/buf_parse_test.h test/test.h test/buf_parse_test_su.h test/env_test.c test/buf_parse_test_s64.c test/types_test.c test/hash_test.c test/call_test.c test/set__tag_test.c test/facts_test.c test/facts_cursor_test.c test/compare_test.h test/buf_parse_test_s32.c test/test.c test/buf_parse_test.c test/fact_test.c test/tag_test.c test/set__fact_test.c test/buf_parse_test_u32.c test/buf_test.c test/list_test.c test/buf_parse_test_u8.c test/tuple_test.c ucd2c/ucd.h ucd2c/ucd2c.c '