diff options
Diffstat (limited to 'libgcc/configure.ac')
| -rw-r--r-- | libgcc/configure.ac | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/libgcc/configure.ac b/libgcc/configure.ac new file mode 100644 index 0000000000..99b8e15562 --- /dev/null +++ b/libgcc/configure.ac @@ -0,0 +1,582 @@ +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) +sinclude(../config/sjlj.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 "$enableval" in + yes) enable_vtable_verify=yes ;; + no) enable_vtable_verify=no ;; + *) enable_vtable_verify=no;; + esac], +[enable_vtable_verify=no]) +AC_SUBST(enable_vtable_verify) + +AC_ARG_WITH(aix-soname, +[AS_HELP_STRING([--with-aix-soname=aix|svr4|both], + [shared library versioning (aka "SONAME") variant to provide on AIX])], +[case "${host}:${enable_shared}" in + power*-*-aix[[5-9]]*:yes) + AC_MSG_CHECKING([which variant of shared library versioning to provide for shared libgcc]) + case ${withval} in + aix|svr4|both) ;; + *) AC_MSG_ERROR([Unknown argument to --with-aix-soname]);; + esac + AC_MSG_RESULT($withval) + ;; + *) with_aix_soname=aix ;; + esac +], [with_aix_soname=aix]) +AC_SUBST(with_aix_soname) + +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/$multi_os_directory ;; + esac + ;; +esac +AC_SUBST(toolexecdir) +AC_SUBST(toolexeclibdir) + +dnl These must be called before AM_PROG_LIBTOOL, because it may want +dnl to call AC_CHECK_PROG. +AC_CHECK_TOOL(AR, ar) +AC_CHECK_TOOL(LIPO, lipo, :) +AC_CHECK_TOOL(NM, nm) +AC_CHECK_TOOL(RANLIB, ranlib, :) +AC_CHECK_TOOL(STRIP, strip, :) +AC_PROG_LN_S + +GCC_NO_EXECUTABLES +AC_PROG_CC +AC_PROG_CPP_WERROR + +AC_SYS_LARGEFILE + +AC_CHECK_SIZEOF([double]) +AC_CHECK_SIZEOF([long double]) +AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8]) +AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8]) +AC_SUBST(double_type_size) +AC_SUBST(long_double_type_size) + +AC_CHECK_HEADERS(inttypes.h stdint.h stdlib.h ftw.h \ + unistd.h sys/stat.h sys/types.h \ + string.h strings.h memory.h) +AC_HEADER_STDC + +# Check for decimal float support. +AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp], + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#include <fenv.h> +]], [[ +_Decimal32 x; +int fe_except = + FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT; +]])], + [libgcc_cv_dfp=yes], + [libgcc_cv_dfp=no])]) +decimal_float=$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 + +# Check if the compiler is configured for setjmp/longjmp exceptions. +GCC_CHECK_SJLJ_EXCEPTIONS + +AC_ARG_ENABLE([explicit-exception-frame-registration], + [AC_HELP_STRING([--enable-explicit-exception-frame-registration], + [register exception tables explicitly at module start, for use + e.g. for compatibility with installations without PT_GNU_EH_FRAME support])], +[ +force_explicit_eh_registry= +if test "$enable_explicit_exception_frame_registration" = yes; then + if test $ac_cv_sjlj_exceptions = yes; then + AC_MSG_ERROR([Can't --enable-explicit-exception-frame-registration + with setjmp/longjmp exceptions]) + fi + force_explicit_eh_registry=-DUSE_EH_FRAME_REGISTRY_ALWAYS +fi +]) +AC_SUBST([force_explicit_eh_registry]) + +AC_LIB_PROG_LD_GNU + +AC_MSG_CHECKING([for thread model used by GCC]) +target_thread_file=`$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 + +case ${host} in +*-*-solaris2*) + # Check for system-provided CRTs on Solaris 11.4. + AC_CACHE_CHECK([system-provided CRTs on Solaris], + [libgcc_cv_solaris_crts], + [libgcc_cv_solaris_crts=no + libgcc_sysroot="`${CC} -print-sysroot`" + libgcc_libdir="$libgcc_sysroot/usr/lib" + # At the time they were added, gcrt1.o became a symlink for backwards + # compatibility on x86, while crt1.o was added on sparc, so check for that. + case ${host} in + i?86-*-solaris2* | x86_64-*-solaris2*) + if test -h "$libgcc_libdir/gcrt1.o"; then libgcc_cv_solaris_crts=yes; fi + ;; + sparc*-*-solaris2*) + if test -f "$libgcc_libdir/crt1.o"; then libgcc_cv_solaris_crts=yes; fi + ;; + esac]) + if test $libgcc_cv_solaris_crts = yes; then + AC_DEFINE(HAVE_SOLARIS_CRTS, 1, + [Define if the system-provided CRTs are present on Solaris.]) + fi + ;; +esac + +# Determine the version of glibc, if any, used on the target. +AC_MSG_CHECKING([for target glibc version]) +AC_ARG_WITH([glibc-version], + [AS_HELP_STRING([--with-glibc-version=M.N], + [assume GCC used with glibc version M.N or later])], [ +if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then + glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'` + glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'` +else + AC_MSG_ERROR([option --with-glibc-version requires a version number M.N]) +fi], [ +AC_COMPUTE_INT([glibc_version_major], [__GLIBC__], + [#include <features.h>], + [glibc_version_major=0]) +AC_COMPUTE_INT([glibc_version_minor], [__GLIBC_MINOR__], + [#include <features.h>], + [glibc_version_minor=0])]) +AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor]) + +# Determine floating-point type for powerpc*-*-linux*. +# Single-precision-only FPRs are not a supported configuration for +# this target, so are not allowed for in this test. +case ${host} in +powerpc*-*-linux*) + cat > conftest.c <<EOF +#ifdef __powerpc64__ +ppc_fp_type=64 +#elif defined _SOFT_FLOAT +ppc_fp_type=soft +#elif defined _SOFT_DOUBLE +ppc_fp_type=e500v1 +#elif defined __NO_FPRS__ +ppc_fp_type=e500v2 +#else +ppc_fp_type=hard +#endif +EOF +eval `${CC-cc} -E conftest.c | grep ppc_fp_type=` +rm -f conftest.c +# glibc 2.19 and later provide all the soft-fp functions, with proper +# interactions with <fenv.h> exception and rounding mode handling, so +# make libgcc's versions into compat symbols if a recent enough glibc +# version is being used. +ppc_fp_compat= +case ${ppc_fp_type} in +soft|e500v1|e500v2) + if test $glibc_version_major -gt 2 \ + || ( test $glibc_version_major -eq 2 \ + && test $glibc_version_minor -ge 19 ); then + ppc_fp_compat="t-softfp-compat" + fi + ;; +esac +;; +esac + +case ${host} in +# At present, we cannot turn -mfloat128 on via #pragma GCC target, +# so just check if we have VSX (ISA 2.06) support to build the +# software libraries, and whether the assembler can handle xsaddqp +# for hardware support. +powerpc*-*-linux*) + saved_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128" + AC_CACHE_CHECK([for PowerPC ISA 2.06 to build __float128 libraries], + [libgcc_cv_powerpc_float128], + [AC_COMPILE_IFELSE( + [vector double dadd (vector double a, vector double b) { return a + b; }], + [libgcc_cv_powerpc_float128=yes], + [libgcc_cv_powerpc_float128=no])]) + + CFLAGS="$CFLAGS -mpower9-vector -mfloat128-hardware" + AC_CACHE_CHECK([for PowerPC ISA 3.0 to build hardware __float128 libraries], + [libgcc_cv_powerpc_float128_hw], + [AC_COMPILE_IFELSE( + [#include <sys/auxv.h> + #ifndef AT_PLATFORM + #error "AT_PLATFORM is not defined" + #endif + vector unsigned char add (vector unsigned char a, vector unsigned char b) + { + vector unsigned char ret; + __asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b)); + return ret; + } + void *add_resolver (void) { return (void *) add; } + __float128 add_ifunc (__float128, __float128) + __attribute__ ((__ifunc__ ("add_resolver")));], + [libgcc_cv_powerpc_float128_hw=yes], + [libgcc_cv_powerpc_float128_hw=no])]) + CFLAGS="$saved_CFLAGS" +esac + +# Collect host-machine-specific information. +. ${srcdir}/config.host + +# Used for constructing correct paths for offload compilers. +accel_dir_suffix= +real_host_noncanonical=${host_noncanonical} +if test x"$enable_as_accelerator_for" != x; then + accel_dir_suffix=/accel/${target_noncanonical} + real_host_noncanonical=${enable_as_accelerator_for} +fi +AC_SUBST(accel_dir_suffix) +AC_SUBST(real_host_noncanonical) + +if test x"$enable_offload_targets" != x; then + extra_parts="${extra_parts} crtoffloadbegin.o crtoffloadend.o crtoffloadtable.o" +fi + +# 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 if xtensa target is configured for windowed ABI and thus needs to use +# custom unwind code. +# This is after config.host so we can augment tmake_file. +case ${host} in +xtensa*-*) + cat > conftest.c <<EOF + #ifdef __XTENSA_CALL0_ABI__ + #error + #endif +EOF + if AC_TRY_COMMAND(${CC-cc} -E -o conftest.i conftest.c 1>&AS_MESSAGE_LOG_FD); then + tmake_file="${tmake_file} xtensa/t-windowed" + fi + ;; +esac + +# Check for visibility support. This is after config.host so that +# we can check for asm_hidden_op. +AC_CACHE_CHECK([for __attribute__((visibility("hidden")))], + libgcc_cv_hidden_visibility_attribute, [ + echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c + libgcc_cv_hidden_visibility_attribute=no + if AC_TRY_COMMAND(${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([$target_thread_file]) + +# Determine what GCC version number to use in filesystem paths. +GCC_BASE_VER + +# Substitute configuration variables +AC_SUBST(cpu_type) +AC_SUBST(extra_parts) +AC_SUBST(asm_hidden_op) +AC_SUBST(enable_execute_stack) +AC_SUBST(unwind_header) +AC_SUBST(md_unwind_header) +AC_SUBST(sfp_machine_header) +AC_SUBST(thread_header) + +# We need multilib support. +AC_CONFIG_FILES([Makefile]) +AC_CONFIG_COMMANDS([default], + [[test -z "$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 |