mirror of git://gcc.gnu.org/git/gcc.git
372 lines
12 KiB
Plaintext
372 lines
12 KiB
Plaintext
dnl Process this with autoconf to create configure
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AC_PREREQ(2.64)
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AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues])
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AC_CONFIG_HEADERS([fficonfig.h])
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AM_ENABLE_MULTILIB(, ..)
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AC_CANONICAL_SYSTEM
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target_alias=${target_alias-$host_alias}
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AM_INIT_AUTOMAKE([no-dist])
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# See if makeinfo has been installed and is modern enough
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# that we can use it.
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ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
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[GNU texinfo.* \([0-9][0-9.]*\)],
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[4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
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AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
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# We would like our source tree to be readonly. However when releases or
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# pre-releases are generated, the flex/bison generated files as well as the
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# various formats of manuals need to be included along with the rest of the
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# sources. Therefore we have --enable-generated-files-in-srcdir to do
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# just that.
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AC_MSG_CHECKING(generated-files-in-srcdir)
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AC_ARG_ENABLE(generated-files-in-srcdir,
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AS_HELP_STRING([--enable-generated-files-in-srcdir],
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[put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
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[case "$enableval" in
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yes) enable_generated_files_in_srcdir=yes ;;
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no) enable_generated_files_in_srcdir=no ;;
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*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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esac],
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[enable_generated_files_in_srcdir=no])
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AC_MSG_RESULT($enable_generated_files_in_srcdir)
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AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
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# The same as in boehm-gc and libstdc++. Have to borrow it from there.
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# We must force CC to /not/ be precious variables; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
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# Also save and restore CFLAGS, since AC_PROG_CC will come up with
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# defaults of its own if none are provided.
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m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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save_CFLAGS=$CFLAGS
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AC_PROG_CC
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AC_PROG_CXX
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CFLAGS=$save_CFLAGS
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m4_undefine([_AC_ARG_VAR_PRECIOUS])
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m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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AC_SUBST(CFLAGS)
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AM_PROG_AS
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AM_PROG_CC_C_O
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AC_PROG_LIBTOOL
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# Test for 64-bit build.
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AC_CHECK_SIZEOF([size_t])
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AM_MAINTAINER_MODE
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AC_CHECK_HEADERS(sys/mman.h)
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AC_CHECK_FUNCS([mmap mkostemp])
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AC_FUNC_MMAP_BLACKLIST
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dnl The -no-testsuite modules omit the test subdir.
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AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
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TARGETDIR="unknown"
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HAVE_LONG_DOUBLE_VARIANT=0
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. ${srcdir}/configure.host
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if test -n "${UNSUPPORTED}"; then
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AC_MSG_ERROR(["libffi has not been ported to $host."])
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fi
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AC_SUBST(AM_RUNTESTFLAGS)
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AC_SUBST(AM_LTLDFLAGS)
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AC_HEADER_STDC
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AC_CHECK_FUNCS(memcpy)
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AC_FUNC_ALLOCA
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AC_CHECK_SIZEOF(double)
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AC_CHECK_SIZEOF(long double)
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# Also AC_SUBST this variable for ffi.h.
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if test -z "$HAVE_LONG_DOUBLE"; then
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HAVE_LONG_DOUBLE=0
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if test $ac_cv_sizeof_long_double != 0; then
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if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
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AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
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HAVE_LONG_DOUBLE=1
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else
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if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
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HAVE_LONG_DOUBLE=1
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AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
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fi
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fi
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fi
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fi
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AC_SUBST(HAVE_LONG_DOUBLE)
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AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
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AC_C_BIGENDIAN
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GCC_AS_CFI_PSEUDO_OP
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case "$TARGET" in
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SPARC)
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AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
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libffi_cv_as_sparc_ua_pcrel, [
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save_CFLAGS="$CFLAGS"
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save_LDFLAGS="$LDFLAGS"
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CFLAGS="$CFLAGS -fpic"
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LDFLAGS="$LDFLAGS -shared"
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AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
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[libffi_cv_as_sparc_ua_pcrel=yes],
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[libffi_cv_as_sparc_ua_pcrel=no])
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CFLAGS="$save_CFLAGS"
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LDFLAGS="$save_LDFLAGS"])
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if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
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AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
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[Define if your assembler and linker support unaligned PC relative relocs.])
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fi
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AC_CACHE_CHECK([assembler .register pseudo-op support],
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libffi_cv_as_register_pseudo_op, [
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libffi_cv_as_register_pseudo_op=unknown
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# Check if we have .register
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AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
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[libffi_cv_as_register_pseudo_op=yes],
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[libffi_cv_as_register_pseudo_op=no])
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])
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if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
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AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
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[Define if your assembler supports .register.])
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fi
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;;
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X86*)
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AC_CACHE_CHECK([assembler supports pc related relocs],
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libffi_cv_as_x86_pcrel, [
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libffi_cv_as_x86_pcrel=no
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echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
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if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
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libffi_cv_as_x86_pcrel=yes
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fi
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])
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if test "x$libffi_cv_as_x86_pcrel" = xyes; then
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AC_DEFINE(HAVE_AS_X86_PCREL, 1,
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[Define if your assembler supports PC relative relocs.])
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fi
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;;
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S390)
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AC_CACHE_CHECK([compiler uses zarch features],
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libffi_cv_as_s390_zarch, [
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libffi_cv_as_s390_zarch=no
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echo 'void foo(void) { bar(); bar(); }' > conftest.c
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if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
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if grep -q brasl conftest.s; then
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libffi_cv_as_s390_zarch=yes
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fi
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fi
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])
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if test "x$libffi_cv_as_s390_zarch" = xyes; then
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AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
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[Define if the compiler uses zarch features.])
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fi
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;;
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esac
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# On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
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AC_ARG_ENABLE(pax_emutramp,
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[ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC],
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if test "$enable_pax_emutramp" = "yes"; then
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AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
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[Define this if you want to enable pax emulated trampolines])
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fi)
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FFI_EXEC_TRAMPOLINE_TABLE=0
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case "$target" in
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*arm*-apple-darwin* | aarch64-apple-darwin*)
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FFI_EXEC_TRAMPOLINE_TABLE=1
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AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
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[Cannot use PROT_EXEC on this target, so, we revert to
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alternative means])
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;;
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*-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
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AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
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[Cannot use malloc on this target, so, we revert to
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alternative means])
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;;
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esac
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AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
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AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
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if test x$TARGET = xX86_64; then
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AC_CACHE_CHECK([toolchain supports unwind section type],
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libffi_cv_as_x86_64_unwind_section_type, [
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cat > conftest1.s << EOF
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.text
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.globl foo
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foo:
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jmp bar
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.section .eh_frame,"a",@unwind
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bar:
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EOF
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cat > conftest2.c << EOF
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extern void foo();
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int main(){foo();}
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EOF
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libffi_cv_as_x86_64_unwind_section_type=no
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# we ensure that we can compile _and_ link an assembly file containing an @unwind section
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# since the compiler can support it and not the linker (ie old binutils)
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if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
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$CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
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libffi_cv_as_x86_64_unwind_section_type=yes
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fi
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])
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if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
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AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
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[Define if your assembler supports unwind section type.])
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fi
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fi
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if test "x$GCC" = "xyes"; then
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AC_CACHE_CHECK([whether .eh_frame section should be read-only],
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libffi_cv_ro_eh_frame, [
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libffi_cv_ro_eh_frame=no
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echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
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if $CC $CFLAGS -c -fpic -fexceptions -o conftest.o conftest.c > /dev/null 2>&1; then
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objdump -h conftest.o > conftest.dump 2>&1
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libffi_eh_frame_line=`grep -n eh_frame conftest.dump | cut -d: -f 1`
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if test "x$libffi_eh_frame_line" != "x"; then
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libffi_test_line=`expr $libffi_eh_frame_line + 1`p
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sed -n $libffi_test_line conftest.dump > conftest.line
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if grep READONLY conftest.line > /dev/null; then
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libffi_cv_ro_eh_frame=yes
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fi
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fi
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fi
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rm -f conftest.*
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])
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if test "x$libffi_cv_ro_eh_frame" = xyes; then
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AC_DEFINE(HAVE_RO_EH_FRAME, 1,
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[Define if .eh_frame sections should be read-only.])
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AC_DEFINE(EH_FRAME_FLAGS, "a",
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[Define to the flags needed for the .section .eh_frame directive. ])
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else
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AC_DEFINE(EH_FRAME_FLAGS, "aw",
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[Define to the flags needed for the .section .eh_frame directive. ])
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fi
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AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
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libffi_cv_hidden_visibility_attribute, [
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echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
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libffi_cv_hidden_visibility_attribute=no
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if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
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if grep '\.hidden.*foo' conftest.s >/dev/null; then
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libffi_cv_hidden_visibility_attribute=yes
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fi
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fi
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rm -f conftest.*
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])
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if test $libffi_cv_hidden_visibility_attribute = yes; then
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AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
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[Define if __attribute__((visibility("hidden"))) is supported.])
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fi
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fi
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AH_BOTTOM([
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#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
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#ifdef LIBFFI_ASM
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#define FFI_HIDDEN(name) .hidden name
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#else
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#define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
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#endif
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#else
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#ifdef LIBFFI_ASM
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#define FFI_HIDDEN(name)
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#else
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#define FFI_HIDDEN
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#endif
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#endif
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])
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AC_SUBST(TARGET)
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AC_SUBST(TARGETDIR)
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changequote(<,>)
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TARGET_OBJ=
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for i in $SOURCES; do
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TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
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done
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changequote([,])
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AC_SUBST(TARGET_OBJ)
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AC_SUBST(SHELL)
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AC_ARG_ENABLE(debug,
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[ --enable-debug debugging mode],
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if test "$enable_debug" = "yes"; then
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AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
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fi)
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AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
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AC_ARG_ENABLE(structs,
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[ --disable-structs omit code for struct support],
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if test "$enable_structs" = "no"; then
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AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
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fi)
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AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
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AC_ARG_ENABLE(raw-api,
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[ --disable-raw-api make the raw api unavailable],
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if test "$enable_raw_api" = "no"; then
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AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
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fi)
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AC_ARG_ENABLE(purify-safety,
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[ --enable-purify-safety purify-safe mode],
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if test "$enable_purify_safety" = "yes"; then
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AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
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fi)
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if test -n "$with_cross_host" &&
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test x"$with_cross_host" != x"no"; then
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toolexecdir='$(exec_prefix)/$(target_alias)'
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toolexeclibdir='$(toolexecdir)/lib'
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else
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toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
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toolexeclibdir='$(libdir)'
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fi
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multi_os_directory=`$CC -print-multi-os-directory`
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case $multi_os_directory in
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.) ;; # Avoid trailing /.
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*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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esac
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AC_SUBST(toolexecdir)
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AC_SUBST(toolexeclibdir)
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if test "${multilib}" = "yes"; then
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multilib_arg="--enable-multilib"
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else
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multilib_arg=
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fi
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# Check linker support.
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LIBAT_ENABLE_SYMVERS
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AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
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AC_CONFIG_COMMANDS(src, [
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test -d src || mkdir src
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test -d src/$TARGETDIR || mkdir src/$TARGETDIR
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], [TARGETDIR="$TARGETDIR"])
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AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
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AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)
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AC_OUTPUT
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