dnl Process this with autoconf to create configure
AC_INIT(,[3.4.8],) AC_CONFIG_HEADERS()
AC_CANONICAL_TARGET target_alias=${target_alias-$host_alias}
case “${host}” in
frv*-elf) LDFLAGS=`echo $LDFLAGS | sed "s/\-B[^ ]*libgloss\/frv\///"`\ -B`pwd`/../libgloss/frv/ ;;
esac
AX_ENABLE_BUILDDIR
AM_INIT_AUTOMAKE
# The same as in boehm-gc and libstdc++. Have to borrow it from there. # We must force CC to /not/ be precious variables; otherwise # the wrong, non-multilib-adjusted value will be used in multilibs. # As a side effect, we have to subst CFLAGS ourselves. # Also save and restore CFLAGS, since AC_PROG_CC will come up with # defaults of its own if none are provided.
m4_rename(,[real_PRECIOUS]) m4_define(,[]) save_CFLAGS=$CFLAGS AC_PROG_CC AC_PROG_CXX CFLAGS=$save_CFLAGS m4_undefine() m4_rename_force(,[_AC_ARG_VAR_PRECIOUS])
AC_SUBST(CFLAGS)
AM_PROG_AS AM_PROG_CC_C_O AC_PROG_EGREP LT_INIT AC_CONFIG_MACRO_DIR()
AC_CHECK_TOOLS(, [readelf greadelf])
# Test for 64-bit build. AC_CHECK_SIZEOF()
AX_COMPILER_VENDOR AX_CC_MAXOPT # The AX_CFLAGS_WARN_ALL macro doesn’t currently work for sunpro # compiler. if test “$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()
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 $host."])
fi
AC_SUBST(AM_RUNTESTFLAGS) AC_SUBST(AM_LTLDFLAGS)
m4_warn(, [The preprocessor macro ‘STDC_HEADERS’ is obsolete.
Except in unusual embedded environments, you can safely include all ISO C90 headers unconditionally.])dnl
# Autoupdate added the next two lines to ensure that your configure # script’s behavior did not change. They are probably safe to remove. AC_CHECK_INCLUDES_DEFAULT AC_PROG_EGREP
AC_CHECK_FUNCS(memcpy) AC_CHECK_HEADERS(alloca.h)
AC_CHECK_SIZEOF(double) AC_CHECK_SIZEOF(long double)
# Also AC_SUBST this variable for ffi.h. if test -z “$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_ARM64E_PTRAUTH 1 # endif endif
ifndef HAVE_ARM64E_PTRAUTH # error Pointer authentication not supported endif
]])],[libffi_cv_as_ptrauth=yes],[libffi_cv_as_ptrauth=no])
]) if test “x$libffi_cv_as_ptrauth” = xyes; then
AC_DEFINE(HAVE_ARM64E_PTRAUTH, 1,
[Define if your compiler supports pointer authentication.])
fi
# On PaX enable kernels that have MPROTECT enable we can’t use PROT_EXEC; # if EMUTRAMP is active too ffi could try mapping without PROT_EXEC, # but the kernel needs to recognize the trampoline generated by ffi. # Otherwise fallback to double mmap trick. AC_ARG_ENABLE(pax_emutramp,
[ --enable-pax_emutramp enable pax emulated trampolines (experimental)],
if test "$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|foo.*,hidden' 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-* | s390x*-linux-* | powerpc*-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