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gcc/libgcc/configure.ac

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dnl Process this file with autoconf to produce a configure script.
sinclude(../config/enable.m4)
sinclude(../config/tls.m4)
sinclude(../config/acx.m4)
sinclude(../config/no-executables.m4)
sinclude(../config/lib-ld.m4)
sinclude(../config/override.m4)
sinclude(../config/picflag.m4)
sinclude(../config/dfp.m4)
sinclude(../config/unwind_ipinfo.m4)
sinclude(../config/gthr.m4)
AC_PREREQ(2.64)
AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
AC_CONFIG_SRCDIR([static-object.mk])
# The libgcc should not depend on any header files
AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
[m4_divert_text([DEFAULTS],
[ac_includes_default='/* none */'])])
AC_ARG_WITH(target-subdir,
[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
AC_ARG_WITH(cross-host,
[ --with-cross-host=HOST Configuring with a cross compiler])
AC_ARG_WITH(ld,
[ --with-ld arrange to use the specified ld (full pathname)])
if test "${srcdir}" = "."; then
if test -n "${with_build_subdir}"; then
libgcc_topdir="${srcdir}/../.."
with_target_subdir=
elif test -z "${with_target_subdir}"; then
libgcc_topdir="${srcdir}/.."
else
if test "${with_target_subdir}" != "."; then
libgcc_topdir="${srcdir}/${with_multisrctop}../.."
else
libgcc_topdir="${srcdir}/${with_multisrctop}.."
fi
fi
else
libgcc_topdir="${srcdir}/.."
fi
AC_SUBST(libgcc_topdir)
AC_CONFIG_AUX_DIR($libgcc_topdir)
AC_CONFIG_HEADER(auto-target.h:config.in)
AC_ARG_ENABLE(shared,
[ --disable-shared don't provide a shared libgcc],
[
case $enable_shared in
yes | no) ;;
*)
enable_shared=no
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
for pkg in $enableval; do
if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
enable_shared=yes
fi
done
IFS="$ac_save_ifs"
;;
esac
], [enable_shared=yes])
AC_SUBST(enable_shared)
AC_ARG_ENABLE(vtable-verify,
[ --enable-vtable-verify Enable vtable verification feature ],
[case "$enableval" in
yes) enable_vtable_verify=yes ;;
no) enable_vtable_verify=no ;;
*) enable_vtable_verify=no;;
esac],
[enable_vtable_verify=no])
AC_SUBST(enable_vtable_verify)
GCC_PICFLAG
AC_SUBST(PICFLAG)
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
AC_ARG_ENABLE(version-specific-runtime-libs,
[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
[case "$enableval" in
yes) version_specific_libs=yes ;;
no) version_specific_libs=no ;;
*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
esac],
[version_specific_libs=no])
AC_MSG_RESULT($version_specific_libs)
AC_ARG_WITH(slibdir,
[ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
slibdir="$with_slibdir",
if test "${version_specific_libs}" = yes; then
slibdir='$(libsubdir)'
elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
else
slibdir='$(libdir)'
fi)
AC_SUBST(slibdir)
# Command-line options.
# Very limited version of AC_MAINTAINER_MODE.
AC_ARG_ENABLE([maintainer-mode],
[AC_HELP_STRING([--enable-maintainer-mode],
[enable make rules and dependencies not useful (and
sometimes confusing) to the casual installer])],
[case ${enable_maintainer_mode} in
yes) MAINT='' ;;
no) MAINT='#' ;;
*) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
esac
maintainer_mode=${enableval}],
[MAINT='#'])
AC_SUBST([MAINT])dnl
AC_PROG_INSTALL
AC_PROG_AWK
# We need awk; bail out if it's missing.
case ${AWK} in
"") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
esac
AC_CANONICAL_HOST
ACX_NONCANONICAL_HOST
ACX_NONCANONICAL_TARGET
GCC_TOPLEV_SUBDIRS
# Calculate toolexeclibdir
# Also toolexecdir, though it's only used in toolexeclibdir
case ${version_specific_libs} in
yes)
# Need the gcc compiler version to know where to install libraries
# and header files if --enable-version-specific-runtime-libs option
# is selected.
toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
;;
no)
if test -n "$with_cross_host" &&
test x"$with_cross_host" != x"no"; then
# Install a library built with a cross compiler in tooldir, not libdir.
toolexecdir='$(exec_prefix)/$(target_noncanonical)'
toolexeclibdir='$(toolexecdir)/lib'
else
toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
toolexeclibdir='$(libdir)'
fi
multi_os_directory=`$CC -print-multi-os-directory`
case $multi_os_directory in
.) ;; # Avoid trailing /.
*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
esac
;;
esac
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)
dnl These must be called before AM_PROG_LIBTOOL, because it may want
dnl to call AC_CHECK_PROG.
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(LIPO, lipo, :)
AC_CHECK_TOOL(NM, nm)
AC_CHECK_TOOL(RANLIB, ranlib, :)
AC_CHECK_TOOL(STRIP, strip, :)
AC_PROG_LN_S
GCC_NO_EXECUTABLES
AC_PROG_CC
AC_PROG_CPP_WERROR
AC_CHECK_SIZEOF([double])
AC_CHECK_SIZEOF([long double])
AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8])
AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8])
AC_SUBST(double_type_size)
AC_SUBST(long_double_type_size)
# Check for decimal float support.
AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <fenv.h>
]], [[
_Decimal32 x;
int fe_except =
FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT;
]])],
[libgcc_cv_dfp=yes],
[libgcc_cv_dfp=no])])
decimal_float=$libgcc_cv_dfp
AC_SUBST(decimal_float)
GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
# Check for fixed-point support.
AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
[AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
[libgcc_cv_fixed_point=no])])
fixed_point=$libgcc_cv_fixed_point
AC_SUBST(fixed_point)
# For platforms with the unwind ABI which includes an unwind library,
# libunwind, we can choose to use the system libunwind.
# config.gcc also contains tests of with_system_libunwind.
GCC_CHECK_UNWIND_GETIPINFO
# The sjlj test is almost duplicated here and in libgo/configure.ac (for C),
# libstdc++-v3/acinclude.m4 and libjava/configure.ac (for C++), and
# libobjc/configure.ac (for Objective-C).
# FIXME: This should be centralized in config/sjlj.m4.
AC_ARG_ENABLE(sjlj-exceptions,
AC_HELP_STRING([--enable-sjlj-exceptions],
[force use of builtin_setjmp for exceptions]),
[case "$enableval" in
yes|no|auto) ;;
*) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
esac],
[enable_sjlj_exceptions=auto])
AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
[libgcc_cv_lib_sjlj_exceptions],
[AC_LANG_CONFTEST(
[AC_LANG_SOURCE([
void bar ();
void clean (int *);
void foo ()
{
int i __attribute__ ((cleanup (clean)));
bar();
}
])])
CFLAGS_hold=$CFLAGS
CFLAGS="--save-temps -fexceptions"
libgcc_cv_lib_sjlj_exceptions=unknown
AS_IF([ac_fn_c_try_compile],
[if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
libgcc_cv_lib_sjlj_exceptions=yes
elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
libgcc_cv_lib_sjlj_exceptions=no
fi])
CFLAGS=$CFLAGS_hold
rm -f conftest*
])
if test "$enable_sjlj_exceptions" = "auto"; then
enable_sjlj_exceptions=$libgcc_cv_lib_sjlj_exceptions
fi
case $enable_sjlj_exceptions in
yes)
AC_DEFINE(LIBGCC_SJLJ_EXCEPTIONS, 1,
[Define if the C compiler is configured for setjmp/longjmp exceptions.])
;;
no)
;;
*)
AC_MSG_ERROR([unable to detect exception model])
;;
esac
AC_LIB_PROG_LD_GNU
AC_MSG_CHECKING([for thread model used by GCC])
target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
AC_MSG_RESULT([$target_thread_file])
# Check for assembler CFI support.
AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
[AC_COMPILE_IFELSE(
[asm("\n\
.text\n\
.cfi_startproc\n\
.cfi_personality 0, symbol\n\
.cfi_endproc");],
[libgcc_cv_cfi=yes],
[libgcc_cv_cfi=no])])
# Check 32bit or 64bit. In the case of MIPS, this really determines the
# word size rather than the address size.
cat > conftest.c <<EOF
#if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__)) \
|| defined(__mips64)
host_address=64
#else
host_address=32
#endif
EOF
eval `${CC-cc} -E conftest.c | grep host_address=`
rm -f conftest.c
case ${host} in
mips*-*-*)
AC_CACHE_CHECK([whether the target is hard-float],
[libgcc_cv_mips_hard_float],
[AC_COMPILE_IFELSE(
[#ifndef __mips_hard_float
#error FOO
#endif],
[libgcc_cv_mips_hard_float=yes],
[libgcc_cv_mips_hard_float=no])])
esac
# Collect host-machine-specific information.
. ${srcdir}/config.host
# Check if Solaris/x86 linker supports ZERO terminator unwind entries.
# This is after config.host so we can augment tmake_file.
# Link with -nostartfiles -nodefaultlibs since neither are present while
# building libgcc.
case ${host} in
i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
cat > conftest.s <<EOF
.section .eh_frame,"a",@unwind
.zero 4
.section .jcr,"aw",@progbits
.zero 8
EOF
if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
tmake_file="${tmake_file} i386/t-crtstuff"
fi
;;
esac
# Check for visibility support. This is after config.host so that
# we can check for asm_hidden_op.
AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
libgcc_cv_hidden_visibility_attribute, [
echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
libgcc_cv_hidden_visibility_attribute=no
if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
libgcc_cv_hidden_visibility_attribute=yes
fi
fi
rm -f conftest.*
])
if test $libgcc_cv_hidden_visibility_attribute = yes; then
vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
else
vis_hide=
fi
AC_SUBST(vis_hide)
# See if we have thread-local storage. We can only test assembler
# since link-time and run-time tests require the newly built
# gcc, which can't be used to build executable due to that libgcc
# is yet to be built here.
GCC_CHECK_CC_TLS
set_have_cc_tls=
if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
set_have_cc_tls="-DHAVE_CC_TLS"
fi
AC_SUBST(set_have_cc_tls)
# See if we have emulated thread-local storage.
GCC_CHECK_EMUTLS
set_use_emutls=
if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
set_use_emutls="-DUSE_EMUTLS"
fi
AC_SUBST(set_use_emutls)
AC_CACHE_CHECK(for init priority support, libgcc_cv_init_priority, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,
[[void ip (void) __attribute__ ((constructor (1)));]])],
[libgcc_cv_init_priority=yes],[libgcc_cv_init_priority=no])])
if test $libgcc_cv_init_priority = yes; then
AC_DEFINE(HAVE_INIT_PRIORITY, 1,
[Define if the compiler supports init priority.])
fi
# Conditionalize the sfp-machine.h header for this target machine.
if test -z "${sfp_machine_header}"; then
sfp_machine_header=$cpu_type/sfp-machine.h
if test -f ${srcdir}/config/${sfp_machine_header}; then
:
else
sfp_machine_header=no-sfp-machine.h
fi
fi
AC_SUBST(sfp_machine_header)
# Conditionalize the makefile for this target machine.
tmake_file_=
for f in ${tmake_file}
do
if test -f ${srcdir}/config/$f
then
tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
fi
done
tmake_file="${tmake_file_}"
AC_SUBST(tmake_file)
# Likewise export definitions for libgcc_tm.h
tm_file_=
for f in ${tm_file}
do
tm_file_="${tm_file_} \$(srcdir)/config/$f"
done
tm_file="${tm_file_}"
AC_SUBST(tm_file)
AC_SUBST(tm_defines)
# Map from thread model to thread header.
GCC_AC_THREAD_HEADER([$target_thread_file])
# Substitute configuration variables
AC_SUBST(cpu_type)
AC_SUBST(extra_parts)
AC_SUBST(asm_hidden_op)
AC_CONFIG_LINKS([enable-execute-stack.c:$enable_execute_stack])
AC_CONFIG_LINKS([unwind.h:$unwind_header])
AC_CONFIG_LINKS([md-unwind-support.h:config/$md_unwind_header])
AC_CONFIG_LINKS([sfp-machine.h:config/$sfp_machine_header])
AC_CONFIG_LINKS([gthr-default.h:$thread_header])
# We need multilib support.
AC_CONFIG_FILES([Makefile])
AC_CONFIG_COMMANDS([default],
[[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
if test -n "$CONFIG_FILES"; then
# FIXME: We shouldn't need to set ac_file
ac_file=Makefile
. ${libgcc_topdir}/config-ml.in
fi]],
[[srcdir=${srcdir}
host=${host}
with_target_subdir=${with_target_subdir}
with_multisubdir=${with_multisubdir}
ac_configure_args="--enable-multilib ${ac_configure_args}"
CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
libgcc_topdir=${libgcc_topdir}
CC="${CC}"
]])
AC_OUTPUT
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