dnl Process this with autoconf to create configure
AC_PREREQ([2.71])
AC_INIT([libffi],[3.4.4],[http://github.com/libffi/libffi/issues])
AC_CONFIG_HEADERS([fficonfig.h])
AC_CANONICAL_TARGET
target_alias=${target_alias-$host_alias}
case "${host}" in
frv*-elf)
LDFLAGS=`echo $LDFLAGS | sed "s/\-B[^ ]*libgloss\/frv\///"`\ -B`pwd`/../libgloss/frv/
;;
esac
AX_ENABLE_BUILDDIR
AM_INIT_AUTOMAKE
# The same as in boehm-gc and libstdc++. Have to borrow it from there.
# We must force CC to /not/ be precious variables; otherwise
# the wrong, non-multilib-adjusted value will be used in multilibs.
# As a side effect, we have to subst CFLAGS ourselves.
# Also save and restore CFLAGS, since AC_PROG_CC will come up with
# defaults of its own if none are provided.
m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
m4_define([_AC_ARG_VAR_PRECIOUS],[])
save_CFLAGS=$CFLAGS
AC_PROG_CC
AC_PROG_CXX
CFLAGS=$save_CFLAGS
m4_undefine([_AC_ARG_VAR_PRECIOUS])
m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
AC_SUBST(CFLAGS)
AM_PROG_AS
AM_PROG_CC_C_O
AC_PROG_EGREP
LT_INIT
AC_CONFIG_MACRO_DIR([m4])
AC_CHECK_TOOL(READELF, readelf)
# Test for 64-bit build.
AC_CHECK_SIZEOF([size_t])
AX_COMPILER_VENDOR
AX_CC_MAXOPT
# The AX_CFLAGS_WARN_ALL macro doesn't currently work for sunpro
# compiler.
if test "$ax_cv_c_compiler_vendor" != "sun"; then
AX_CFLAGS_WARN_ALL
fi
if test "x$GCC" = "xyes"; then
CFLAGS="$CFLAGS -fexceptions"
fi
cat > local.exp <<EOF
set CC_FOR_TARGET "$CC"
set CXX_FOR_TARGET "$CXX"
set compiler_vendor "$ax_cv_c_compiler_vendor"
EOF
AM_MAINTAINER_MODE
AC_CHECK_HEADERS(sys/memfd.h)
AC_CHECK_FUNCS([memfd_create])
AC_CHECK_HEADERS(sys/mman.h)
AC_CHECK_FUNCS([mmap mkostemp mkstemp])
AC_FUNC_MMAP_BLACKLIST
dnl The -no-testsuite modules omit the test subdir.
AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
TARGETDIR="unknown"
HAVE_LONG_DOUBLE_VARIANT=0
. ${srcdir}/configure.host
if test -n "${UNSUPPORTED}"; then
AC_MSG_ERROR(["libffi has not been ported to $host."])
fi
AC_SUBST(AM_RUNTESTFLAGS)
AC_SUBST(AM_LTLDFLAGS)
m4_warn([obsolete],
[The preprocessor macro `STDC_HEADERS' is obsolete.
Except in unusual embedded environments, you can safely include all
ISO C90 headers unconditionally.])dnl
# Autoupdate added the next two lines to ensure that your configure
# script's behavior did not change. They are probably safe to remove.
AC_CHECK_INCLUDES_DEFAULT
AC_PROG_EGREP
AC_CHECK_FUNCS(memcpy)
AC_FUNC_ALLOCA
AC_CHECK_SIZEOF(double)
AC_CHECK_SIZEOF(long double)
# Also AC_SUBST this variable for ffi.h.
if test -z "$HAVE_LONG_DOUBLE"; then
HAVE_LONG_DOUBLE=0
if test $ac_cv_sizeof_long_double != 0; then
if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
HAVE_LONG_DOUBLE=1
else
if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
HAVE_LONG_DOUBLE=1
AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
fi
fi
fi
fi
AC_SUBST(HAVE_LONG_DOUBLE)
AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
AC_C_BIGENDIAN
GCC_AS_CFI_PSEUDO_OP
case "$TARGET" in
SPARC)
AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
libffi_cv_as_sparc_ua_pcrel, [
save_CFLAGS="$CFLAGS"
save_LDFLAGS="$LDFLAGS"
CFLAGS="$CFLAGS -fpic"
LDFLAGS="$LDFLAGS -shared"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");]], [[]])],[libffi_cv_as_sparc_ua_pcrel=yes],[libffi_cv_as_sparc_ua_pcrel=no])
CFLAGS="$save_CFLAGS"
LDFLAGS="$save_LDFLAGS"])
if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
[Define if your assembler and linker support unaligned PC relative relocs.])
fi
AC_CACHE_CHECK([assembler .register pseudo-op support],
libffi_cv_as_register_pseudo_op, [
libffi_cv_as_register_pseudo_op=unknown
# Check if we have .register
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[asm (".register %g2, #scratch");]])],[libffi_cv_as_register_pseudo_op=yes],[libffi_cv_as_register_pseudo_op=no])
])
if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
[Define if your assembler supports .register.])
fi
;;
X86*)
AC_CACHE_CHECK([assembler supports pc related relocs],
libffi_cv_as_x86_pcrel, [
libffi_cv_as_x86_pcrel=no
echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
libffi_cv_as_x86_pcrel=yes
fi
])
if test "x$libffi_cv_as_x86_pcrel" = xyes; then
AC_DEFINE(HAVE_AS_X86_PCREL, 1,
[Define if your assembler supports PC relative relocs.])
fi
;;
S390)
AC_CACHE_CHECK([compiler uses zarch features],
libffi_cv_as_s390_zarch, [
libffi_cv_as_s390_zarch=no
echo 'void foo(void) { bar(); bar(); }' > conftest.c
if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
if grep -q brasl conftest.s; then
libffi_cv_as_s390_zarch=yes
fi
fi
])
if test "x$libffi_cv_as_s390_zarch" = xyes; then
AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
[Define if the compiler uses zarch features.])
fi
;;
esac
AC_CACHE_CHECK([whether compiler supports pointer authentication],
libffi_cv_as_ptrauth, [
libffi_cv_as_ptrauth=unknown
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
#ifdef __clang__
# if __has_feature(ptrauth_calls)
# define HAVE_PTRAUTH 1
# endif
#endif
#ifndef HAVE_PTRAUTH
# error Pointer authentication not supported
#endif
]])],[libffi_cv_as_ptrauth=yes],[libffi_cv_as_ptrauth=no])
])
if test "x$libffi_cv_as_ptrauth" = xyes; then
AC_DEFINE(HAVE_PTRAUTH, 1,
[Define if your compiler supports pointer authentication.])
fi
# On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC;
# if EMUTRAMP is active too ffi could try mapping without PROT_EXEC,
# but the kernel needs to recognize the trampoline generated by ffi.
# Otherwise fallback to double mmap trick.
AC_ARG_ENABLE(pax_emutramp,
[ --enable-pax_emutramp enable pax emulated trampolines (experimental)],
if test "$enable_pax_emutramp" = "yes"; then
AC_MSG_WARN([EMUTRAMP is experimental only. Use --enable-pax_emutramp=experimental to enforce.])
elif test "$enable_pax_emutramp" = "experimental"; then
AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
[Define this if you want to enable pax emulated trampolines (experimental)])
fi)
LT_SYS_SYMBOL_USCORE
if test "x$sys_symbol_underscore" = xyes; then
AC_DEFINE(SYMBOL_UNDERSCORE, 1, [Define if symbols are underscored.])
fi
FFI_EXEC_TRAMPOLINE_TABLE=0
case "$target" in
*arm*-apple-* | aarch64-apple-*)
FFI_EXEC_TRAMPOLINE_TABLE=1
AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
[Cannot use PROT_EXEC on this target, so, we revert to
alternative means])
;;
*-apple-* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris* | *-linux-android*)
AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
[Cannot use malloc on this target, so, we revert to
alternative means])
;;
esac
AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
if test x$TARGET = xX86_64; then
AC_CACHE_CHECK([toolchain supports unwind section type],
libffi_cv_as_x86_64_unwind_section_type, [
cat > conftest1.s << EOF
.text
.globl foo
foo:
jmp bar
.section .eh_frame,"a",@unwind
bar:
EOF
cat > conftest2.c << EOF
extern void foo();
int main(){foo();}
EOF
libffi_cv_as_x86_64_unwind_section_type=no
# we ensure that we can compile _and_ link an assembly file containing an @unwind section
# since the compiler can support it and not the linker (ie old binutils)
if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
$CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
libffi_cv_as_x86_64_unwind_section_type=yes
fi
])
if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
[Define if your assembler supports unwind section type.])
fi
fi
if test "x$GCC" = "xyes"; then
AX_CHECK_COMPILE_FLAG(-fno-lto, libffi_cv_no_lto=-fno-lto)
AC_CACHE_CHECK([whether .eh_frame section should be read-only],
libffi_cv_ro_eh_frame, [
libffi_cv_ro_eh_frame=yes
echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
if $CC $CFLAGS -c -fpic -fexceptions $libffi_cv_no_lto -o conftest.o conftest.c > /dev/null 2>&1; then
if $READELF -WS conftest.o 2>/dev/null | grep -q -n 'eh_frame .* WA'; then
libffi_cv_ro_eh_frame=no
fi
fi
rm -f conftest.*
])
if test "x$libffi_cv_ro_eh_frame" = xyes; then
AC_DEFINE(HAVE_RO_EH_FRAME, 1,
[Define if .eh_frame sections should be read-only.])
AC_DEFINE(EH_FRAME_FLAGS, "a",
[Define to the flags needed for the .section .eh_frame directive. ])
else
AC_DEFINE(EH_FRAME_FLAGS, "aw",
[Define to the flags needed for the .section .eh_frame directive. ])
fi
AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
libffi_cv_hidden_visibility_attribute, [
echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
libffi_cv_hidden_visibility_attribute=no
if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
if $EGREP '(\.hidden|\.private_extern).*foo' conftest.s >/dev/null; then
libffi_cv_hidden_visibility_attribute=yes
fi
fi
rm -f conftest.*
])
if test $libffi_cv_hidden_visibility_attribute = yes; then
AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
[Define if __attribute__((visibility("hidden"))) is supported.])
fi
fi
AC_ARG_ENABLE(docs,
AS_HELP_STRING([--disable-docs],[Disable building of docs (default: no)]),
[enable_docs=no],
[enable_docs=yes])
AM_CONDITIONAL(BUILD_DOCS, [test x$enable_docs = xyes])
AH_BOTTOM([
#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
#ifdef LIBFFI_ASM
#ifdef __APPLE__
#define FFI_HIDDEN(name) .private_extern name
#else
#define FFI_HIDDEN(name) .hidden name
#endif
#else
#define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
#endif
#else
#ifdef LIBFFI_ASM
#define FFI_HIDDEN(name)
#else
#define FFI_HIDDEN
#endif
#endif
])
AC_SUBST(TARGET)
AC_SUBST(TARGETDIR)
changequote(<,>)
TARGET_OBJ=
for i in $SOURCES; do
TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
done
changequote([,])
AC_SUBST(TARGET_OBJ)
AC_SUBST(SHELL)
AC_ARG_ENABLE(debug,
[ --enable-debug debugging mode],
if test "$enable_debug" = "yes"; then
AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
fi)
AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
AC_ARG_ENABLE(structs,
[ --disable-structs omit code for struct support],
if test "$enable_structs" = "no"; then
AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
fi)
AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
AC_ARG_ENABLE(raw-api,
[ --disable-raw-api make the raw api unavailable],
if test "$enable_raw_api" = "no"; then
AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
fi)
AC_ARG_ENABLE(exec-static-tramp,
[ --disable-exec-static-tramp disable use of static exec trampolines (enabled by default)])
if test "$enable_exec_static_tramp" != no; then
case "$target" in
*-cygwin* | *-msys*)
# Only define static trampolines if we are using the cygwin runtime.
# Will this need to be changed for mingw?
if test "x$GCC" = "xyes"; then
AC_DEFINE(FFI_EXEC_STATIC_TRAMP, 1,
[Define this if you want statically defined trampolines])
fi
;;
*arm*-*-linux-* | aarch64*-*-linux-* | i*86-*-linux-* | x86_64-*-linux-* | loongarch*-*-linux-*)
AC_DEFINE(FFI_EXEC_STATIC_TRAMP, 1,
[Define this if you want statically defined trampolines])
;;
esac
fi
AC_ARG_ENABLE(purify-safety,
[ --enable-purify-safety purify-safe mode],
if test "$enable_purify_safety" = "yes"; then
AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
fi)
AC_ARG_ENABLE(multi-os-directory,
[ --disable-multi-os-directory
disable use of gcc --print-multi-os-directory to change the library installation directory])
# These variables are only ever used when we cross-build to X86_WIN32.
# And we only support this with GCC, so...
if test "x$GCC" = "xyes"; then
if test -n "$with_cross_host" &&
test x"$with_cross_host" != x"no"; then
toolexecdir='${exec_prefix}'/'$(target_alias)'
toolexeclibdir='${toolexecdir}'/lib
else
toolexecdir='${libdir}'/gcc-lib/'$(target_alias)'
toolexeclibdir='${libdir}'
fi
if test x"$enable_multi_os_directory" != x"no"; then
multi_os_directory=`$CC $CFLAGS -print-multi-os-directory`
case $multi_os_directory in
.) ;; # Avoid trailing /.
../*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
esac
fi
AC_SUBST(toolexecdir)
else
toolexeclibdir='${libdir}'
fi
AC_SUBST(toolexeclibdir)
# Conditionalize the makefile for this target machine.
tmake_file_=
for f in ${tmake_file}; do
if test -f ${srcdir}/src/$TARGETDIR/$f; then
tmake_file_="${tmake_file_} \$(srcdir)/src/$TARGETDIR/$f"
fi
done
tmake_file="${tmake_file_}"
AC_SUBST(tmake_file)
# Check linker support.
LIBFFI_ENABLE_SYMVERS
AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
AC_CONFIG_COMMANDS(src, [
test -d src || mkdir src
test -d src/$TARGETDIR || mkdir src/$TARGETDIR
], [TARGETDIR="$TARGETDIR"])
AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile doc/Makefile libffi.pc)
AC_OUTPUT
# Copy this file instead of using AC_CONFIG_LINK in order to support
# compiling with MSVC, which won't understand cygwin style symlinks.
cp ${srcdir}/src/$TARGETDIR/ffitarget.h include/ffitarget.h
