kc3-lang/kc3

diff --git a/Makefile b/Makefile
index 42efe6f..bcc06f1 100644
--- a/Makefile
+++ b/Makefile
@@ -572,6 +572,22 @@ lib_links_bsd_debug:
 	ln -sf ../../../markdown/.libs/libkc3_markdown_debug.so.0.0 lib/kc3/0.1/markdown.so
 	ln -sf ../../../socket/.libs/libkc3_socket_debug.so.0.0 lib/kc3/0.1/socket.so
 
+lib_links_darwin:
+	ln -sf ../../../ekc3/.libs/libekc3.0.dylib lib/kc3/0.1/ekc3.so
+	ln -sf ../../../event/.libs/libkc3_event.0.dylib lib/kc3/0.1/event.so
+	ln -sf ../../../http/.libs/libkc3_http.0.dylib lib/kc3/0.1/http.so
+	ln -sf ../../../json/.libs/libkc3_json.0.dylib lib/kc3/0.1/json.so
+	ln -sf ../../../markdown/.libs/libkc3_markdown.0.dylib lib/kc3/0.1/markdown.so
+	ln -sf ../../../socket/.libs/libkc3_socket.0.dylib lib/kc3/0.1/socket.so
+
+lib_links_darwin_debug:
+	ln -sf ../../../ekc3/.libs/libekc3_debug.0.dylib lib/kc3/0.1/ekc3.so
+	ln -sf ../../../event/.libs/libkc3_event_debug.0.dylib lib/kc3/0.1/event.so
+	ln -sf ../../../http/.libs/libkc3_http_debug.0.dylib lib/kc3/0.1/http.so
+	ln -sf ../../../json/.libs/libkc3_json_debug.0.dylib lib/kc3/0.1/json.so
+	ln -sf ../../../markdown/.libs/libkc3_markdown_debug.0.dylib lib/kc3/0.1/markdown.so
+	ln -sf ../../../socket/.libs/libkc3_socket_debug.0.dylib lib/kc3/0.1/socket.so
+
 lib_links_linux:
 	ln -sf ../../../ekc3/.libs/libekc3.so lib/kc3/0.1/ekc3.so
 	ln -sf ../../../event/.libs/libkc3_event.so lib/kc3/0.1/event.so
diff --git a/config.subr b/config.subr
index a84e029..b94a95f 100644
--- a/config.subr
+++ b/config.subr
@@ -557,43 +557,43 @@ update_build_lib() {
 }
 
 update_build_objc() {
-    OBJCC_MAIN=.build_objcc_main.tmp
-    OBJCC_ASAN=.build_objcc_asan.tmp
-    OBJCC_COV=.build_objcc_cov.tmp
-    OBJCC_DEBUG=.build_objcc_debug.tmp
+    OBJC_MAIN=.build_objc_main.tmp
+    OBJC_ASAN=.build_objc_asan.tmp
+    OBJC_COV=.build_objc_cov.tmp
+    OBJC_DEBUG=.build_objc_debug.tmp
     mkdir -p .build
 
-    echo "#!/bin/sh" >> ${OBJCC_ASAN}
-    echo "# gen by configure" >> ${OBJCC_ASAN}
-    echo "OBJCC=\"${OBJCC}\"" >> ${OBJCC_ASAN}
-    echo "CPPFLAGS=\"${CPPFLAGS_ASAN}\"" >> ${OBJCC_ASAN}
-    echo "CFLAGS=\"${CFLAGS_ASAN}\"" >> ${OBJCC_ASAN}
-    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJCC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJCC_ASAN}
-    update_and_chmod 755 ${OBJCC_ASAN} .build_objcc_asan
-
-    echo "#!/bin/sh" >> ${OBJCC_COV}
-    echo "# gen by configure" >> ${OBJCC_COV}
-    echo "OBJCC=\"${OBJCC}\"" >> ${OBJCC_COV}
-    echo "CPPFLAGS=\"${CPPFLAGS_COV}\"" >> ${OBJCC_COV}
-    echo "CFLAGS=\"${CFLAGS_COV}\"" >> ${OBJCC_COV}
-    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJCC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJCC_COV}
-    update_and_chmod 755 ${OBJCC_COV} .build_objcc_cov
-
-    echo "#!/bin/sh" >> ${OBJCC_DEBUG}
-    echo "# gen by configure" >> ${OBJCC_DEBUG}
-    echo "OBJCC=\"${OBJCC}\"" >> ${OBJCC_DEBUG}
-    echo "CPPFLAGS=\"${CPPFLAGS_DEBUG}\"" >> ${OBJCC_DEBUG}
-    echo "CFLAGS=\"${CFLAGS_DEBUG}\"" >> ${OBJCC_DEBUG}
-    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJCC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJCC_DEBUG}
-    update_and_chmod 755 ${OBJCC_DEBUG} .build_objcc_debug
-
-    echo "#!/bin/sh" >> ${OBJCC_MAIN}
-    echo "# gen by configure" >> ${OBJCC_MAIN}
-    echo "OBJCC=\"${OBJCC}\"" >> ${OBJCC_MAIN}
-    echo "CPPFLAGS=\"${CPPFLAGS}\"" >> ${OBJCC_MAIN}
-    echo "CFLAGS=\"${CFLAGS}\"" >> ${OBJCC_MAIN}
-    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJCC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJCC_MAIN}
-    update_and_chmod 755 ${OBJCC_MAIN} .build_objcc_main
+    echo "#!/bin/sh" >> ${OBJC_ASAN}
+    echo "# gen by configure" >> ${OBJC_ASAN}
+    echo "OBJC=\"${OBJC}\"" >> ${OBJC_ASAN}
+    echo "CPPFLAGS=\"${CPPFLAGS_ASAN}\"" >> ${OBJC_ASAN}
+    echo "CFLAGS=\"${CFLAGS_ASAN}\"" >> ${OBJC_ASAN}
+    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJC_ASAN}
+    update_and_chmod 755 ${OBJC_ASAN} .build_objc_asan
+
+    echo "#!/bin/sh" >> ${OBJC_COV}
+    echo "# gen by configure" >> ${OBJC_COV}
+    echo "OBJC=\"${OBJC}\"" >> ${OBJC_COV}
+    echo "CPPFLAGS=\"${CPPFLAGS_COV}\"" >> ${OBJC_COV}
+    echo "CFLAGS=\"${CFLAGS_COV}\"" >> ${OBJC_COV}
+    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJC_COV}
+    update_and_chmod 755 ${OBJC_COV} .build_objc_cov
+
+    echo "#!/bin/sh" >> ${OBJC_DEBUG}
+    echo "# gen by configure" >> ${OBJC_DEBUG}
+    echo "OBJC=\"${OBJC}\"" >> ${OBJC_DEBUG}
+    echo "CPPFLAGS=\"${CPPFLAGS_DEBUG}\"" >> ${OBJC_DEBUG}
+    echo "CFLAGS=\"${CFLAGS_DEBUG}\"" >> ${OBJC_DEBUG}
+    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJC_DEBUG}
+    update_and_chmod 755 ${OBJC_DEBUG} .build_objc_debug
+
+    echo "#!/bin/sh" >> ${OBJC_MAIN}
+    echo "# gen by configure" >> ${OBJC_MAIN}
+    echo "OBJC=\"${OBJC}\"" >> ${OBJC_MAIN}
+    echo "CPPFLAGS=\"${CPPFLAGS}\"" >> ${OBJC_MAIN}
+    echo "CFLAGS=\"${CFLAGS}\"" >> ${OBJC_MAIN}
+    echo "${LIBTOOL} --tag=CC --mode=compile \${OBJC} \${CPPFLAGS} \${CFLAGS} -c \"\$1\" -o \"\$2\" >> .build/log 2>&1" >> ${OBJC_MAIN}
+    update_and_chmod 755 ${OBJC_MAIN} .build_objc_main
 }
 
 update_build_prog() {
@@ -822,14 +822,14 @@ echo "LIBTOOL = $LIBTOOL" >> ${CONFIG_MK}
 #echo "SWIFTC = $SWIFTC" >> ${CONFIG_MK}
 #echo "HAVE_SWIFT = $HAVE_SWIFT" >> ${CONFIG_MK}
 
-if [ "x$OBJCC" = "x" ]; then
+if [ "x$OBJC" = "x" ]; then
     if test -x "$(which clang 2>/dev/null)"; then
-        OBJCC="$(which clang)"
+        OBJC="$(which clang)"
     else
-        OBJCC=clang
+        OBJC=clang
     fi
 fi
-echo "OBJCC = $OBJCC" >> ${CONFIG_MK}
+echo "OBJC = $OBJC" >> ${CONFIG_MK}
 
 PREFIX="${PREFIX:-/usr/local}"
 echo "PREFIX = $PREFIX" >> ${CONFIG_MK}
diff --git a/env b/env
index d494448..c160898 100644
--- a/env
+++ b/env
@@ -1,2 +1,5 @@
 export LD_LIBRARY_PATH="$PWD/libkc3/.libs:$PWD/ekc3/.libs:$PWD/http/.libs:$PWD/markdown/.libs:$PWD/lib/kc3/0.1:$LD_LIBRARY_PATH"
+export DYLD_LIBRARY_PATH="$PWD/libkc3/.libs:$PWD/ekc3/.libs:$PWD/http/.libs:$PWD/markdown/.libs:$PWD/lib/kc3/0.1:$DYLD_LIBRARY_PATH"
+export KC3_HTTPD_HOST=0.0.0.0
+export KC3_HTTPD_PORT=58000
 #export MALLOC_OPTIONS=CDFGJU
diff --git a/libkc3/facts.c b/libkc3/facts.c
index a067221..38959e2 100644
--- a/libkc3/facts.c
+++ b/libkc3/facts.c
@@ -442,7 +442,14 @@ s_facts * facts_lock_clean (s_facts *facts)
 
 s_facts * facts_lock_init (s_facts *facts)
 {
+  uw i;
   assert(facts);
+  if (true) {
+    i = (uw) &facts->rwlock;
+    err_write_1("facts_lock_init: ");
+    err_inspect_uw_hexadecimal(&i);
+    err_write_1("\n");
+  }
   if (pthread_rwlock_init(&facts->rwlock, NULL)) {
     err_puts("facts_lock_init: pthread_rwlock_init");
     assert(! "facts_lock_init: pthread_rwlock_init");
@@ -455,15 +462,43 @@ s_facts * facts_lock_init (s_facts *facts)
 
 s_facts * facts_lock_r (s_facts *facts)
 {
+  sw e;
+  uw i;
   pthread_t thread;
   assert(facts);
   thread = pthread_self();
-  if (facts->rwlock_thread != thread &&
-      pthread_rwlock_rdlock(&facts->rwlock)) {
-    err_puts("facts_lock_r: pthread_rwlock_rdlock");
-    assert(! "facts_lock_r: pthread_rwlock_rdlock");
-    abort();
-    return NULL;
+  if (facts->rwlock_thread != thread) {
+    if (true) {
+      i = (uw) &facts->rwlock;
+      err_write_1("facts_lock_r: ");
+      err_inspect_uw_hexadecimal(&i);
+      err_write_1("\n");
+    }
+    if ((e = pthread_rwlock_rdlock(&facts->rwlock))) {
+      err_write_1("facts_lock_r: pthread_rwlock_rdlock: ");
+      switch (e) {
+      case EAGAIN:
+        err_puts("the maximum number of read locks on this lock has"
+                 " been exceeded");
+        break;
+      case EDEADLK:
+        err_puts("the current thread already owns this lock for"
+                 " writing");
+        break;
+      case EINVAL:
+        err_puts("invalid lock");
+        break;
+      case ENOMEM:
+        err_puts("not enough memory to initialize the lock");
+        break;
+      default:
+        err_puts("unknown error");
+        break;
+      }
+      assert(! "facts_lock_r: pthread_rwlock_rdlock");
+      abort();
+      return NULL;
+    }
   }
   return facts;
 }
diff --git a/libkc3/tag.c b/libkc3/tag.c
index b9ff02d..00dea61 100644
--- a/libkc3/tag.c
+++ b/libkc3/tag.c
@@ -11,6 +11,7 @@
  * THIS SOFTWARE.
  */
 #include <string.h>
+#include <strings.h>
 #include "alloc.h"
 #include "array.h"
 #include "assert.h"
@@ -48,6 +49,10 @@
 #include "unquote.h"
 #include "var.h"
 
+#ifdef __APPLE__
+# define explicit_bzero(p, size) bzero(p, size)
+#endif
+
 s_tag g_tag_first;
 s_tag g_tag_last;
 
diff --git a/markdown/md4c b/markdown/md4c
index 481fbfb..c5a6da5 160000
--- a/markdown/md4c
+++ b/markdown/md4c
@@ -1 +1 @@
-Subproject commit 481fbfbdf72daab2912380d62bb5f2187d438408
+Subproject commit c5a6da53d3a1db532246a4d97f68913a2f22d39e
diff --git a/window/sdl2/demo/macos/.build_objc_asan b/window/sdl2/demo/macos/.build_objc_asan
new file mode 100755
index 0000000..ed98d2b
--- /dev/null
+++ b/window/sdl2/demo/macos/.build_objc_asan
@@ -0,0 +1,6 @@
+#!/bin/sh
+# gen by configure
+OBJC="/usr/bin/clang"
+CPPFLAGS=""
+CFLAGS=""
+/opt/homebrew/bin/glibtool --tag=CC --mode=compile ${OBJC} ${CPPFLAGS} ${CFLAGS} -c "$1" -o "$2" >> .build/log 2>&1
diff --git a/window/sdl2/demo/macos/.build_objc_cov b/window/sdl2/demo/macos/.build_objc_cov
new file mode 100755
index 0000000..ed98d2b
--- /dev/null
+++ b/window/sdl2/demo/macos/.build_objc_cov
@@ -0,0 +1,6 @@
+#!/bin/sh
+# gen by configure
+OBJC="/usr/bin/clang"
+CPPFLAGS=""
+CFLAGS=""
+/opt/homebrew/bin/glibtool --tag=CC --mode=compile ${OBJC} ${CPPFLAGS} ${CFLAGS} -c "$1" -o "$2" >> .build/log 2>&1
diff --git a/window/sdl2/demo/macos/.build_objc_debug b/window/sdl2/demo/macos/.build_objc_debug
new file mode 100755
index 0000000..ed98d2b
--- /dev/null
+++ b/window/sdl2/demo/macos/.build_objc_debug
@@ -0,0 +1,6 @@
+#!/bin/sh
+# gen by configure
+OBJC="/usr/bin/clang"
+CPPFLAGS=""
+CFLAGS=""
+/opt/homebrew/bin/glibtool --tag=CC --mode=compile ${OBJC} ${CPPFLAGS} ${CFLAGS} -c "$1" -o "$2" >> .build/log 2>&1
diff --git a/window/sdl2/demo/macos/.build_objc_main b/window/sdl2/demo/macos/.build_objc_main
new file mode 100755
index 0000000..ed98d2b
--- /dev/null
+++ b/window/sdl2/demo/macos/.build_objc_main
@@ -0,0 +1,6 @@
+#!/bin/sh
+# gen by configure
+OBJC="/usr/bin/clang"
+CPPFLAGS=""
+CFLAGS=""
+/opt/homebrew/bin/glibtool --tag=CC --mode=compile ${OBJC} ${CPPFLAGS} ${CFLAGS} -c "$1" -o "$2" >> .build/log 2>&1
diff --git a/window/sdl2/demo/macos/configure b/window/sdl2/demo/macos/configure
index d4c12e8..65c1b60 100755
--- a/window/sdl2/demo/macos/configure
+++ b/window/sdl2/demo/macos/configure
@@ -37,6 +37,13 @@ echo "APP_ASAN = ${APP_ASAN}" >> ${CONFIG_MK}
 echo "APP_COV = ${APP_COV}" >> ${CONFIG_MK}
 echo "APP_DEBUG = ${APP_DEBUG}" >> ${CONFIG_MK}
 
+update_build
+update_build_objc
+update_build_prog
+
+build_lo
+build_prog
+
 APP_PROG=${APP}/Contents/MacOS/${PROG}
 APP_PROG_ASAN=${APP_ASAN}/Contents/MacOS/${PROG_ASAN}
 APP_PROG_COV=${APP_COV}/Contents/MacOS/${PROG_COV}