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acinclude.m4
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dnl
dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
dnl
dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
dnl end of configure. This lets tested variables be reassigned, and the
dnl conditional will depend on the final state of the variable. For a simple
dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
dnl
m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
m4_divert_text([glibcxx_diversion],dnl
AM_CONDITIONAL([$1],[$2])
)dnl
])dnl
AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
dnl
dnl Check to see what architecture and operating system we are compiling
dnl for. Also, if architecture- or OS-specific flags are required for
dnl compilation, pick them up here.
dnl
AC_DEFUN([GLIBCXX_CHECK_HOST], [
. $glibcxx_srcdir/configure.host
AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
AC_MSG_NOTICE([OS config directory is $os_include_dir])
])
dnl
dnl Initialize the rest of the library configury. At this point we have
dnl variables like $host.
dnl
dnl Sets:
dnl SUBDIRS
dnl Substs:
dnl glibcxx_builddir (absolute path)
dnl glibcxx_srcdir (absolute path)
dnl toplevel_builddir (absolute path)
dnl toplevel_srcdir (absolute path)
dnl with_cross_host
dnl with_newlib
dnl with_target_subdir
dnl plus
dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
dnl - default settings for all AM_CONFITIONAL test variables
dnl - lots of tools, like CC and CXX
dnl
AC_DEFUN([GLIBCXX_CONFIGURE], [
# Keep these sync'd with the list in Makefile.am. The first provides an
# expandable list at autoconf time; the second provides an expandable list
# (i.e., shell variable) at configure time.
m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/c++20 src/filesystem doc po testsuite python])
SUBDIRS='glibcxx_SUBDIRS'
# These need to be absolute paths, yet at the same time need to
# canonicalize only relative paths, because then amd will not unmount
# drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
glibcxx_builddir=`${PWDCMD-pwd}`
case $srcdir in
[\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
*) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
esac
toplevel_builddir=${glibcxx_builddir}/..
toplevel_srcdir=${glibcxx_srcdir}/..
AC_SUBST(glibcxx_builddir)
AC_SUBST(glibcxx_srcdir)
AC_SUBST(toplevel_builddir)
AC_SUBST(toplevel_srcdir)
# We use these options to decide which functions to include. They are
# set from the top level.
AC_ARG_WITH([target-subdir],
AC_HELP_STRING([--with-target-subdir=SUBDIR],
[configuring in a subdirectory]))
AC_ARG_WITH([cross-host],
AC_HELP_STRING([--with-cross-host=HOST],
[configuring with a cross compiler]))
AC_ARG_WITH([newlib],
AC_HELP_STRING([--with-newlib],
[assume newlib as a system C library]))
# Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
# available). Uncomment the next line to force a particular method.
AC_PROG_LN_S
#LN_S='cp -p'
AC_CHECK_TOOL(AS, as)
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
AM_MAINTAINER_MODE
# Set up safe default values for all subsequent AM_CONDITIONAL tests
# which are themselves conditionally expanded.
## (Right now, this only matters for enable_wchar_t, but nothing prevents
## other macros from doing the same. This should be automated.) -pme
# Check for C library flavor since GNU/Linux platforms use different
# configuration directories depending on the C library in use.
AC_EGREP_CPP([_using_uclibc], [
#include <stdio.h>
#if __UCLIBC__
_using_uclibc
#endif
], uclibc=yes, uclibc=no)
AC_EGREP_CPP([_using_bionic], [
#include <stdio.h>
#if __BIONIC__
_using_bionic
#endif
], bionic=yes, bionic=no)
# Find platform-specific directories containing configuration info.
# Also possibly modify flags used elsewhere, as needed by the platform.
GLIBCXX_CHECK_HOST
])
dnl
dnl Tests for newer compiler features, or features that are present in newer
dnl compiler versions but not older compiler versions still in use, should
dnl be placed here.
dnl
dnl Defines:
dnl WERROR='-Werror' if requested and possible; g++'s that lack the
dnl new inlining code or the new system_header pragma will die on -Werror.
dnl Leave it out by default and use maint-mode to use it.
dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
dnl compiler supports it and the user has not requested debug mode.
dnl
AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
# All these tests are for C++; save the language and the compiler flags.
# The CXXFLAGS thing is suspicious, but based on similar bits previously
# found in GLIBCXX_CONFIGURE.
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_test_CXXFLAGS="${CXXFLAGS+set}"
ac_save_CXXFLAGS="$CXXFLAGS"
# Check for -ffunction-sections -fdata-sections
AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
if test "$ac_test_CXXFLAGS" = set; then
CXXFLAGS="$ac_save_CXXFLAGS"
else
# this is the suspicious part
CXXFLAGS=''
fi
if test x"$ac_fdsections" = x"yes"; then
SECTION_FLAGS='-ffunction-sections -fdata-sections'
fi
AC_MSG_RESULT($ac_fdsections)
AC_LANG_RESTORE
AC_SUBST(SECTION_FLAGS)
])
dnl
dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
dnl the native linker is in use, all variables will be defined to something
dnl safe (like an empty string).
dnl
dnl Defines:
dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
dnl LD (as a side effect of testing)
dnl Sets:
dnl with_gnu_ld
dnl glibcxx_ld_is_gold (set to "no" or "yes")
dnl glibcxx_gnu_ld_version (possibly)
dnl
dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
dnl
AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
# If we're not using GNU ld, then there's no point in even trying these
# tests. Check for that first. We should have already tested for gld
# by now (in libtool), but require it now just to be safe...
test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
AC_REQUIRE([AC_PROG_LD])
AC_REQUIRE([AC_PROG_AWK])
# The name set by libtool depends on the version of libtool. Shame on us
# for depending on an impl detail, but c'est la vie. Older versions used
# ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
# top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
# makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
# set (hence we're using an older libtool), then set it.
if test x${with_gnu_ld+set} != xset; then
if test x${ac_cv_prog_gnu_ld+set} != xset; then
# We got through "ac_require(ac_prog_ld)" and still not set? Huh?
with_gnu_ld=no
else
with_gnu_ld=$ac_cv_prog_gnu_ld
fi
fi
# Start by getting the version number. I think the libtool test already
# does some of this, but throws away the result.
glibcxx_ld_is_gold=no
if test x"$with_gnu_ld" = x"yes"; then
AC_MSG_CHECKING([for ld version])
changequote(,)
if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
glibcxx_ld_is_gold=yes
fi
ldver=`$LD --version 2>/dev/null |
sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'`
changequote([,])
glibcxx_gnu_ld_version=`echo $ldver | \
$AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
AC_MSG_RESULT($glibcxx_gnu_ld_version)
fi
# Set --gc-sections.
glibcxx_have_gc_sections=no
if test "$glibcxx_ld_is_gold" = "yes"; then
if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
glibcxx_have_gc_sections=yes
fi
else
glibcxx_gcsections_min_ld=21602
if test x"$with_gnu_ld" = x"yes" &&
test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
glibcxx_have_gc_sections=yes
fi
fi
if test "$glibcxx_have_gc_sections" = "yes"; then
# Sufficiently young GNU ld it is! Joy and bunny rabbits!
# NB: This flag only works reliably after 2.16.1. Configure tests
# for this are difficult, so hard wire a value that should work.
ac_test_CFLAGS="${CFLAGS+set}"
ac_save_CFLAGS="$CFLAGS"
CFLAGS='-Wl,--gc-sections'
# Check for -Wl,--gc-sections
AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
AC_TRY_LINK([ int one(void) { return 1; }
int two(void) { return 2; }
], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
if test "$ac_gcsections" = "yes"; then
rm -f conftest.c
touch conftest.c
if $CC -c conftest.c; then
if $LD --gc-sections -o conftest conftest.o 2>&1 | \
grep "Warning: gc-sections option ignored" > /dev/null; then
ac_gcsections=no
fi
fi
rm -f conftest.c conftest.o conftest
fi
if test "$ac_gcsections" = "yes"; then
SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
fi
AC_MSG_RESULT($ac_gcsections)
if test "$ac_test_CFLAGS" = set; then
CFLAGS="$ac_save_CFLAGS"
else
# this is the suspicious part
CFLAGS=''
fi
fi
# Set -z,relro.
# Note this is only for shared objects.
ac_ld_relro=no
if test x"$with_gnu_ld" = x"yes"; then
# cygwin and mingw uses PE, which has no ELF relro support,
# multi target ld may confuse configure machinery
case "$host" in
*-*-cygwin*)
;;
*-*-mingw*)
;;
*)
AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
if test -n "$cxx_z_relo"; then
OPT_LDFLAGS="-Wl,-z,relro"
ac_ld_relro=yes
fi
AC_MSG_RESULT($ac_ld_relro)
esac
fi
# Set linker optimization flags.
if test x"$with_gnu_ld" = x"yes"; then
OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
fi
AC_SUBST(SECTION_LDFLAGS)
AC_SUBST(OPT_LDFLAGS)
])
dnl
dnl Check for headers for, and arguments to, the setrlimit() function.
dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
dnl
dnl Defines:
dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
dnl various HAVE_LIMIT_* for individual limit names
dnl
AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
AC_MSG_CHECKING([for RLIMIT_$1])
AC_TRY_COMPILE(
[#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
],
[ int f = RLIMIT_$1 ; ],
[glibcxx_mresult=1], [glibcxx_mresult=0])
AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
[Only used in build directory testsuite_hooks.h.])
if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
AC_MSG_RESULT($res)
])
AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
setrlimit_have_headers=yes
AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
[],
[setrlimit_have_headers=no])
# If don't have the headers, then we can't run the tests now, and we
# won't be seeing any of these during testsuite compilation.
if test $setrlimit_have_headers = yes; then
# Can't do these in a loop, else the resulting syntax is wrong.
GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
# Check for rlimit, setrlimit.
AC_CACHE_VAL(glibcxx_cv_setrlimit, [
AC_TRY_COMPILE(
[#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
],
[struct rlimit r;
setrlimit(0, &r);],
[glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
])
fi
AC_MSG_CHECKING([for testsuite resource limits support])
if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
ac_res_limits=yes
AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
[Define if using setrlimit to set resource limits during
"make check"])
else
ac_res_limits=no
fi
AC_LANG_RESTORE
AC_MSG_RESULT($ac_res_limits)
])
dnl
dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
dnl
AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -fno-exceptions"
AC_MSG_CHECKING([for S_ISREG or S_IFREG])
AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
GCC_TRY_COMPILE_OR_LINK(
[#include <sys/stat.h>],
[struct stat buffer;
fstat(0, &buffer);
S_ISREG(buffer.st_mode);],
[glibcxx_cv_S_ISREG=yes],
[glibcxx_cv_S_ISREG=no])
])
AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
GCC_TRY_COMPILE_OR_LINK(
[#include <sys/stat.h>],
[struct stat buffer;
fstat(0, &buffer);
S_IFREG & buffer.st_mode;],
[glibcxx_cv_S_IFREG=yes],
[glibcxx_cv_S_IFREG=no])
])
res=no
if test $glibcxx_cv_S_ISREG = yes; then
AC_DEFINE(HAVE_S_ISREG, 1,
[Define if S_ISREG is available in <sys/stat.h>.])
res=S_ISREG
elif test $glibcxx_cv_S_IFREG = yes; then
AC_DEFINE(HAVE_S_IFREG, 1,
[Define if S_IFREG is available in <sys/stat.h>.])
res=S_IFREG
fi
AC_MSG_RESULT($res)
CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_RESTORE
])
dnl
dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
dnl
AC_DEFUN([GLIBCXX_CHECK_POLL], [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -fno-exceptions"
AC_MSG_CHECKING([for poll])
AC_CACHE_VAL(glibcxx_cv_POLL, [
GCC_TRY_COMPILE_OR_LINK(
[#include <poll.h>],
[struct pollfd pfd[1];
pfd[0].events = POLLIN;
poll(pfd, 1, 0);],
[glibcxx_cv_POLL=yes],
[glibcxx_cv_POLL=no])
])
if test $glibcxx_cv_POLL = yes; then
AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
fi
AC_MSG_RESULT($glibcxx_cv_POLL)
CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_RESTORE
])
dnl
dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
dnl
AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -fno-exceptions"
AC_MSG_CHECKING([for writev])
AC_CACHE_VAL(glibcxx_cv_WRITEV, [
GCC_TRY_COMPILE_OR_LINK(
[#include <sys/uio.h>],
[struct iovec iov[2];
writev(0, iov, 0);],
[glibcxx_cv_WRITEV=yes],
[glibcxx_cv_WRITEV=no])
])
if test $glibcxx_cv_WRITEV = yes; then
AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
fi
AC_MSG_RESULT($glibcxx_cv_WRITEV)
CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_RESTORE
])
dnl
dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
dnl Also check whether int64_t is actually a typedef to long or long long.
dnl
AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_MSG_CHECKING([for int64_t])
AC_CACHE_VAL(glibcxx_cv_INT64_T, [
AC_TRY_COMPILE(
[#include <stdint.h>],
[int64_t var;],
[glibcxx_cv_INT64_T=yes],
[glibcxx_cv_INT64_T=no])
])
if test $glibcxx_cv_INT64_T = yes; then
AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
AC_MSG_RESULT($glibcxx_cv_INT64_T)
AC_MSG_CHECKING([for int64_t as long])
AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
AC_TRY_COMPILE(
[#include <stdint.h>
template<typename, typename> struct same { enum { value = -1 }; };
template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
int array[same<int64_t, long>::value];], [],
[glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
])
if test $glibcxx_cv_int64_t_long = yes; then
AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
AC_MSG_RESULT($glibcxx_cv_int64_t_long)
fi
AC_MSG_CHECKING([for int64_t as long long])
AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
AC_TRY_COMPILE(
[#include <stdint.h>
template<typename, typename> struct same { enum { value = -1 }; };
template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
int array[same<int64_t, long long>::value];], [],
[glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
])
if test $glibcxx_cv_int64_t_long_long = yes; then
AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
fi
fi
AC_LANG_RESTORE
])
dnl
dnl Check whether LFS support is available.
dnl
AC_DEFUN([GLIBCXX_CHECK_LFS], [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -fno-exceptions"
AC_MSG_CHECKING([for LFS support])
AC_CACHE_VAL(glibcxx_cv_LFS, [
GCC_TRY_COMPILE_OR_LINK(
[#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
],
[FILE* fp;
fopen64("t", "w");
fseeko64(fp, 0, SEEK_CUR);
ftello64(fp);
lseek64(1, 0, SEEK_CUR);
struct stat64 buf;
fstat64(1, &buf);],
[glibcxx_cv_LFS=yes],
[glibcxx_cv_LFS=no])
])
if test $glibcxx_cv_LFS = yes; then
AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
fi
AC_MSG_RESULT($glibcxx_cv_LFS)
CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_RESTORE
])
dnl
dnl Check for whether a fully dynamic basic_string implementation should
dnl be turned on, that does not put empty objects in per-process static
dnl memory (mostly useful together with shared memory allocators, see PR
dnl libstdc++/16612 for details).
dnl
dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
dnl otherwise undefined
dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
dnl Where DEFAULT is either `yes' or `no'.
dnl
AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
if test $enable_fully_dynamic_string = yes; then
enable_fully_dynamic_string_def=1
else
enable_fully_dynamic_string_def=0
fi
AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
[Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
])
dnl
dnl Does any necessary configuration of the testsuite directory. Generates
dnl the testsuite_hooks.h header.
dnl
dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
dnl
dnl Sets:
dnl enable_abi_check
dnl GLIBCXX_TEST_WCHAR_T
dnl GLIBCXX_TEST_THREAD
dnl Substs:
dnl baseline_dir
dnl baseline_subdir_switch
dnl
AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
# Do checks for resource limit functions.
GLIBCXX_CHECK_SETRLIMIT
if $GLIBCXX_IS_NATIVE ; then
# Look for setenv, so that extended locale tests can be performed.
GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
fi
if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
test $enable_symvers != no; then
case "$host" in
*-*-cygwin*)
enable_abi_check=no ;;
*)
enable_abi_check=yes ;;
esac
else
# Only build this as native, since automake does not understand
# CXX_FOR_BUILD.
enable_abi_check=no
fi
# Export file names for ABI checking.
baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
AC_SUBST(baseline_dir)
baseline_subdir_switch="$abi_baseline_subdir_switch"
AC_SUBST(baseline_subdir_switch)
])
dnl
dnl Does any necessary configuration for docbook in the docs directory.
dnl
dnl XSLTPROC must be set before this
dnl
dnl Sets:
dnl glibcxx_stylesheets
dnl Substs:
dnl XSL_STYLE_DIR
dnl
AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/
AC_MSG_CHECKING([for local stylesheet directory])
glibcxx_local_stylesheets=no
if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null`
then
XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'`
glibcxx_local_stylesheets=yes
else
for dir in \
/usr/share/sgml/docbook/xsl-ns-stylesheets \
/usr/share/xml/docbook/stylesheet/docbook-xsl-ns \
/usr/share/xml/docbook/stylesheet/nwalsh5/current \
/usr/share/xml/docbook/stylesheet/nwalsh/current
do
if test -d $dir; then
glibcxx_local_stylesheets=yes
XSL_STYLE_DIR=$dir
break
fi
done
fi
AC_MSG_RESULT($glibcxx_local_stylesheets)
if test x"$glibcxx_local_stylesheets" = x"yes"; then
AC_SUBST(XSL_STYLE_DIR)
AC_MSG_NOTICE($XSL_STYLE_DIR)
AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
glibcxx_stylesheets=no
if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then
if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then
glibcxx_stylesheets=yes
fi
fi
AC_MSG_RESULT($glibcxx_stylesheets)
else
glibcxx_stylesheets=no
fi
# Check for epub3 dependencies.
AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
glibcxx_epub_stylesheets=no
if test x"$glibcxx_local_stylesheets" = x"yes"; then
if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
glibcxx_epub_stylesheets=yes
fi
fi
AC_MSG_RESULT($glibcxx_epub_stylesheets)
AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
])
dnl
dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
dnl
dnl Substs:
dnl GLIBCXX_INCLUDES
dnl TOPLEVEL_INCLUDES
dnl
AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
# Used for every C++ compile we perform.
GLIBCXX_INCLUDES="\
-I$glibcxx_builddir/include/$host_alias \
-I$glibcxx_builddir/include \
-I$glibcxx_srcdir/libsupc++"
# For Canadian crosses, pick this up too.
if test $CANADIAN = yes; then
GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
fi
# Stuff in the actual top level. Currently only used by libsupc++ to
# get unwind* headers from the libgcc dir.
#TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
# Now, export this to all the little Makefiles....
AC_SUBST(GLIBCXX_INCLUDES)
AC_SUBST(TOPLEVEL_INCLUDES)
])
dnl
dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
dnl
dnl Substs:
dnl OPTIMIZE_CXXFLAGS
dnl WARN_FLAGS
dnl
AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
# Optimization flags that are probably a good idea for thrill-seekers. Just
# uncomment the lines below and make, everything else is ready to go...
# Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
# OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
AC_SUBST(OPTIMIZE_CXXFLAGS)
WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2"
AC_SUBST(WARN_FLAGS)
])
dnl
dnl All installation directory information is determined here.
dnl
dnl Substs:
dnl gxx_install_dir
dnl glibcxx_prefixdir
dnl glibcxx_toolexecdir
dnl glibcxx_toolexeclibdir
dnl
dnl Assumes cross_compiling bits already done, and with_cross_host in
dnl particular.
dnl
dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
glibcxx_toolexecdir=no
glibcxx_toolexeclibdir=no
glibcxx_prefixdir=$prefix
AC_MSG_CHECKING([for gxx-include-dir])
AC_ARG_WITH([gxx-include-dir],
AC_HELP_STRING([--with-gxx-include-dir=DIR],
[installation directory for include files]),
[case "$withval" in
yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
no) gxx_include_dir=no ;;
*) gxx_include_dir=$withval ;;
esac],
[gxx_include_dir=no])
AC_MSG_RESULT($gxx_include_dir)
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
AC_ARG_ENABLE([version-specific-runtime-libs],
AC_HELP_STRING([--enable-version-specific-runtime-libs],
[Specify that runtime libraries should be installed in a compiler-specific directory]),
[case "$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)
GCC_WITH_TOOLEXECLIBDIR
# Default case for install directory for include files.
if test $version_specific_libs = no && test $gxx_include_dir = no; then
gxx_include_dir='include/c++/${gcc_version}'
if test -n "$with_cross_host" &&
test x"$with_cross_host" != x"no"; then
gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
else
gxx_include_dir='${prefix}/'"$gxx_include_dir"
fi
fi
# Version-specific runtime libs processing.
if test $version_specific_libs = yes; then
# Need the gcc compiler version to know where to install libraries
# and header files if --enable-version-specific-runtime-libs option
# is selected. FIXME: these variables are misnamed, there are
# no executables installed in _toolexecdir or _toolexeclibdir.
if test x"$gxx_include_dir" = x"no"; then
gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
fi
glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
fi
# Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
# Install a library built with a cross compiler in tooldir, not libdir.
if test x"$glibcxx_toolexecdir" = x"no"; then
if test -n "$with_cross_host" &&
test x"$with_cross_host" != x"no"; then
glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
case ${with_toolexeclibdir} in
no)
glibcxx_toolexeclibdir='${toolexecdir}/lib'
;;
*)
glibcxx_toolexeclibdir=${with_toolexeclibdir}
;;
esac
else
glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
glibcxx_toolexeclibdir='${libdir}'
fi
multi_os_directory=`$CXX -print-multi-os-directory`
case $multi_os_directory in
.) ;; # Avoid trailing /.
*) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
esac
fi
AC_MSG_CHECKING([for install location])
AC_MSG_RESULT($gxx_include_dir)
AC_SUBST(glibcxx_prefixdir)
AC_SUBST(gxx_include_dir)
AC_SUBST(glibcxx_toolexecdir)
AC_SUBST(glibcxx_toolexeclibdir)
])
dnl
dnl GLIBCXX_ENABLE
dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
dnl
dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
dnl documentation.
dnl
m4_define([GLIBCXX_ENABLE],[dnl
m4_define([_g_switch],[--enable-$1])dnl
m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
AC_ARG_ENABLE([$1],m4_dquote(_g_help),
m4_bmatch([$5],
[^permit ],
[[
case "$enableval" in
m4_bpatsubst([$5],[permit ])) ;;
*) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
dnl Idea for future: generate a URL pointing to
dnl "onlinedocs/configopts.html#whatever"
esac
]],
[^$],
[[
case "$enableval" in
yes|no) ;;
*) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
esac
]],
[[$5]]),
[enable_]m4_bpatsubst([$1],-,_)[=][$2])
m4_undefine([_g_switch])dnl
m4_undefine([_g_help])dnl
])
dnl
dnl Check for ISO/IEC 9899:1999 "C99" support.
dnl
dnl --enable-c99 defines _GLIBCXX_USE_C99
dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
dnl Where DEFAULT is either `yes' or `no'.
dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
dnl
AC_DEFUN([GLIBCXX_ENABLE_C99], [
GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
if test x"$enable_c99" = x"yes"; then
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
# Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
# undefined may cause fake C99 facilities, like pre-standard snprintf,
# to be spuriously enabled.
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -std=c++98"
ac_save_LIBS="$LIBS"
ac_save_gcc_no_link="$gcc_no_link"
if test x$gcc_no_link != xyes; then
# Use -fno-exceptions to that the C driver can link these tests without
# hitting undefined references to personality routines.
CXXFLAGS="$CXXFLAGS -fno-exceptions"
AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
# Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
gcc_no_link=yes
])
fi
# Check for the existence of <math.h> functions used if C99 is enabled.
AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98])
AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [
GCC_TRY_COMPILE_OR_LINK(
[#include <math.h>
volatile double d1, d2;
volatile int i;],
[i = fpclassify(d1);
i = isfinite(d1);
i = isinf(d1);
i = isnan(d1);
i = isnormal(d1);
i = signbit(d1);
i = isgreater(d1, d2);
i = isgreaterequal(d1, d2);
i = isless(d1, d2);
i = islessequal(d1, d2);
i = islessgreater(d1, d2);
i = islessgreater(d1, d2);
i = isunordered(d1, d2);
], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
])
AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98)
if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
[Define if C99 functions or macros in <math.h> should be imported
in <cmath> in namespace std for C++98.])
fi
# Check for the existence of <complex.h> complex math functions.
# This is necessary even though libstdc++ uses the builtin versions
# of these functions, because if the builtin cannot be used, a reference
# to the library function is emitted.
AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
if test x"$ac_has_complex_h" = x"yes"; then
AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98])
AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [
GCC_TRY_COMPILE_OR_LINK(
[#include <complex.h>
typedef __complex__ float float_type;
typedef __complex__ double double_type;
typedef __complex__ long double ld_type;
volatile float_type tmpf;
volatile double_type tmpd;
volatile ld_type tmpld;
volatile float f;
volatile double d;
volatile long double ld;],
[f = cabsf(tmpf);
f = cargf(tmpf);
tmpf = ccosf(tmpf);
tmpf = ccoshf(tmpf);
tmpf = cexpf(tmpf);
tmpf = clogf(tmpf);
tmpf = csinf(tmpf);
tmpf = csinhf(tmpf);
tmpf = csqrtf(tmpf);
tmpf = ctanf(tmpf);
tmpf = ctanhf(tmpf);
tmpf = cpowf(tmpf, tmpf);
tmpf = cprojf(tmpf);
d = cabs(tmpd);
d = carg(tmpd);
tmpd = ccos(tmpd);
tmpd = ccosh(tmpd);
tmpd = cexp(tmpd);
tmpd = clog(tmpd);
tmpd = csin(tmpd);
tmpd = csinh(tmpd);
tmpd = csqrt(tmpd);
tmpd = ctan(tmpd);