368fabd5a3
2010-03-30 Jack Howarth <howarth@bromo.med.uc.edu> PR c/43553 * Makefile.in (INTERNAL_CFLAGS): Add @set_use_emutls@. * configure.ac: Use GCC_CHECK_EMUTLS to see if emulated TLS is used and substitute set_use_emutls. * configure: Regenerated. From-SVN: r157821
284 lines
7.8 KiB
Plaintext
284 lines
7.8 KiB
Plaintext
dnl Process this file with autoconf to produce a configure script.
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sinclude(../config/enable.m4)
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sinclude(../config/tls.m4)
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sinclude(../config/acx.m4)
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sinclude(../config/no-executables.m4)
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sinclude(../config/override.m4)
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AC_PREREQ(2.64)
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AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
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AC_CONFIG_SRCDIR([static-object.mk])
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AC_ARG_WITH(target-subdir,
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[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
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AC_ARG_WITH(cross-host,
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[ --with-cross-host=HOST Configuring with a cross compiler])
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AC_ARG_WITH(ld,
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[ --with-ld arrange to use the specified ld (full pathname)])
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if test "${srcdir}" = "."; then
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if test -n "${with_build_subdir}"; then
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libgcc_topdir="${srcdir}/../.."
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with_target_subdir=
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elif test -z "${with_target_subdir}"; then
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libgcc_topdir="${srcdir}/.."
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else
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if test "${with_target_subdir}" != "."; then
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libgcc_topdir="${srcdir}/${with_multisrctop}../.."
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else
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libgcc_topdir="${srcdir}/${with_multisrctop}.."
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fi
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fi
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else
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libgcc_topdir="${srcdir}/.."
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fi
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AC_SUBST(libgcc_topdir)
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AC_CONFIG_AUX_DIR($libgcc_topdir)
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AC_ARG_ENABLE(shared,
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[ --disable-shared don't provide a shared libgcc],
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[
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case $enable_shared in
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yes | no) ;;
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*)
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enable_shared=no
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IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
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for pkg in $enableval; do
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if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
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enable_shared=yes
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fi
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done
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IFS="$ac_save_ifs"
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;;
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esac
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], [enable_shared=yes])
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AC_SUBST(enable_shared)
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AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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AC_ARG_ENABLE(version-specific-runtime-libs,
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[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
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[case "$enableval" in
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yes) version_specific_libs=yes ;;
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no) version_specific_libs=no ;;
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*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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esac],
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[version_specific_libs=no])
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AC_MSG_RESULT($version_specific_libs)
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AC_ARG_WITH(slibdir,
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[ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
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slibdir="$with_slibdir",
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if test "${version_specific_libs}" = yes; then
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slibdir='$(libsubdir)'
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elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
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slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
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else
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slibdir='$(libdir)'
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fi)
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AC_SUBST(slibdir)
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# Command-line options.
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# Very limited version of AC_MAINTAINER_MODE.
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AC_ARG_ENABLE([maintainer-mode],
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[AC_HELP_STRING([--enable-maintainer-mode],
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[enable make rules and dependencies not useful (and
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sometimes confusing) to the casual installer])],
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[case ${enable_maintainer_mode} in
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yes) MAINT='' ;;
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no) MAINT='#' ;;
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*) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
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esac
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maintainer_mode=${enableval}],
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[MAINT='#'])
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AC_SUBST([MAINT])dnl
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AC_PROG_INSTALL
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AC_PROG_AWK
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# We need awk; bail out if it's missing.
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case ${AWK} in
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"") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
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esac
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AC_CANONICAL_HOST
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ACX_NONCANONICAL_HOST
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GCC_TOPLEV_SUBDIRS
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dnl These must be called before AM_PROG_LIBTOOL, because it may want
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dnl to call AC_CHECK_PROG.
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AC_CHECK_TOOL(AR, ar)
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AC_CHECK_TOOL(LIPO, lipo, :)
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AC_CHECK_TOOL(NM, nm)
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AC_CHECK_TOOL(RANLIB, ranlib, :)
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AC_CHECK_TOOL(STRIP, strip, :)
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AC_PROG_LN_S
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GCC_NO_EXECUTABLES
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AC_PROG_CC
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AC_PROG_CPP_WERROR
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# Check for decimal float support.
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AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
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[AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
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[libgcc_cv_dfp=no])])
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decimal_float=$libgcc_cv_dfp
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AC_SUBST(decimal_float)
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AC_ARG_ENABLE(decimal-float,
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[ --enable-decimal-float={no,yes,bid,dpd}
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enable decimal float extension to C. Selecting 'bid'
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or 'dpd' choses which decimal floating point format
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to use],
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[
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case $enable_decimal_float in
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yes | no | bid | dpd) ;;
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*) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
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Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
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esac
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],
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[
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case $host in
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powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
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enable_decimal_float=yes
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;;
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*)
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enable_decimal_float=no
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;;
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esac
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])
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# x86's use BID format instead of DPD
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if test x$enable_decimal_float = xyes; then
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case $host in
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i?86*-*-linux* | x86_64*-*-linux*)
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enable_decimal_float=bid
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;;
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*)
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enable_decimal_float=dpd
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;;
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esac
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fi
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AC_SUBST(enable_decimal_float)
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# Check for fixed-point support.
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AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
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[AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
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[libgcc_cv_fixed_point=no])])
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fixed_point=$libgcc_cv_fixed_point
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AC_SUBST(fixed_point)
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# Check 32bit or 64bit for x86.
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case ${host} in
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i?86*-*-* | x86_64*-*-*)
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cat > conftest.c <<EOF
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#ifdef __x86_64__
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host_address=64
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#else
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host_address=32
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#endif
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EOF
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eval `${CC-cc} -E conftest.c | grep host_address=`
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rm -f conftest.c
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;;
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esac
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# Collect host-machine-specific information.
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. ${srcdir}/config.host
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# Check if Solaris/x86 linker supports ZERO terminator unwind entries.
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# This is after config.host so we can augment tmake_file.
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# Link with -nostartfiles -nodefaultlibs since neither are present while
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# building libgcc.
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case ${host} in
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i?86-*-solaris2.1[[0-9]]*)
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cat > conftest.s <<EOF
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.section .eh_frame,"a",@unwind
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.zero 4
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.section .jcr,"aw",@progbits
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.zero 8
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EOF
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if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
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# configure expects config files in libgcc/config, so need a relative
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# path here.
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tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
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fi
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;;
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esac
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# Check for visibility support. This is after config.host so that
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# we can check for asm_hidden_op.
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AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
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libgcc_cv_hidden_visibility_attribute, [
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echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
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libgcc_cv_hidden_visibility_attribute=no
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if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
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if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
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libgcc_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 $libgcc_cv_hidden_visibility_attribute = yes; then
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vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
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else
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vis_hide=
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fi
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AC_SUBST(vis_hide)
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# See if we have thread-local storage. We can only test assembler
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# sicne link-time and run-time tests require the newly built
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# gcc, which can't be used to build executable due to that libgcc
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# is yet to be built here.
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GCC_CHECK_CC_TLS
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set_have_cc_tls=
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if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
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set_have_cc_tls="-DHAVE_CC_TLS"
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fi
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AC_SUBST(set_have_cc_tls)
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# See if we have emulated thread-local storage.
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GCC_CHECK_EMUTLS
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set_use_emutls=
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if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
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set_use_emutls="-DUSE_EMUTLS"
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fi
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AC_SUBST(set_use_emutls)
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# Conditionalize the makefile for this target machine.
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tmake_file_=
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for f in ${tmake_file}
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do
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if test -f ${srcdir}/config/$f
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then
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tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
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fi
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done
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tmake_file="${tmake_file_}"
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AC_SUBST(tmake_file)
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# Substitute configuration variables
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AC_SUBST(extra_parts)
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AC_SUBST(asm_hidden_op)
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# We need multilib support.
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AC_CONFIG_FILES([Makefile])
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AC_CONFIG_COMMANDS([default],
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[[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
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if test -n "$CONFIG_FILES"; then
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# FIXME: We shouldn't need to set ac_file
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ac_file=Makefile
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. ${libgcc_topdir}/config-ml.in
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fi]],
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[[srcdir=${srcdir}
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host=${host}
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with_target_subdir=${with_target_subdir}
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with_multisubdir=${with_multisubdir}
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ac_configure_args="--enable-multilib ${ac_configure_args}"
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CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
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libgcc_topdir=${libgcc_topdir}
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CC="${CC}"
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]])
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AC_OUTPUT
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