# Start by getting the version number. I think the libtool test already
# does some of this, but throws away the result.
- AC_MSG_CHECKING([for ld version])
- changequote(,)
- ldver=`$LD --version 2>/dev/null | head -1 | \
- sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
- 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)
+ if test x"$with_gnu_ld" = x"yes"; then
+ AC_MSG_CHECKING([for ld version])
+ changequote(,)
+ ldver=`$LD --version 2>/dev/null | head -1 | \
+ sed -e 's/GNU ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\3/'`
+ 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_gcsections_min_ld=21602
dnl
-dnl Check to see if this target can enable the iconv specializations.
-dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
-dnl (This must have been previously checked, along with the rest of C99
-dnl support.) By default, iconv support is disabled.
-dnl
-dnl Defines:
-dnl _GLIBCXX_USE_ICONV if all the bits are found.
-dnl Substs:
-dnl LIBICONV to a -l string containing the iconv library, if needed.
-dnl
-AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
-
- enable_iconv=no
- # Only continue checking if the ISO C99 headers exist and support is on.
- if test x"$enable_wchar_t" = xyes; then
-
- # Use iconv for wchar_t to char conversions. As such, check for
- # X/Open Portability Guide, version 2 features (XPG2).
- AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
- AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
-
- # Check for existence of libiconv.a providing XPG2 wchar_t support.
- AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
- ac_save_LIBS="$LIBS"
- LIBS="$LIBS $LIBICONV"
- AC_SUBST(LIBICONV)
-
- AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
- [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
-
- LIBS="$ac_save_LIBS"
-
- if test x"$ac_has_iconv_h" = xyes &&
- test x"$ac_has_langinfo_h" = xyes &&
- test x"$ac_XPG2funcs" = xyes;
- then
- AC_DEFINE([_GLIBCXX_USE_ICONV],1,
- [Define if iconv and related functions exist and are usable.])
- enable_iconv=yes
- fi
- fi
- AC_MSG_CHECKING([for enabled iconv specializations])
- AC_MSG_RESULT($enable_iconv)
-])
-
-
-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
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
- OPTIMIZE_CXXFLAGS=
AC_SUBST(OPTIMIZE_CXXFLAGS)
WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
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
# Default case for install directory for include files.
if test $version_specific_libs = no && test $gxx_include_dir = no; then
- gxx_include_dir='${prefix}/include/c++/${gcc_version}'
+ gxx_include_dir='include/c++/${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.
AC_DEFUN([GLIBCXX_ENABLE_C99], [
GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
- # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
- # even if C99 support is turned off.
- AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
- AC_MSG_CHECKING([for mbstate_t])
- AC_TRY_COMPILE([#include <wchar.h>],
- [mbstate_t teststate;],
- have_mbstate_t=yes, have_mbstate_t=no)
- AC_MSG_RESULT($have_mbstate_t)
- if test x"$have_mbstate_t" = xyes; then
- AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
- fi
-
if test x"$enable_c99" = x"yes"; then
AC_LANG_SAVE
# 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)
ac_c99_complex=no;
if test x"$ac_has_complex_h" = x"yes"; then
])
AC_MSG_RESULT($ac_c99_stdlib)
- # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
- AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
+ # Check for the existence in <wchar.h> of wcstold, etc.
ac_c99_wchar=no;
if test x"$ac_has_wchar_h" = xyes &&
test x"$ac_has_wctype_h" = xyes; then
+ AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
AC_TRY_COMPILE([#include <wchar.h>
- #include <stddef.h>
- wint_t i;
- long l = WEOF;
- long j = WCHAR_MIN;
- long k = WCHAR_MAX;
namespace test
{
- using ::btowc;
- using ::fgetwc;
- using ::fgetws;
- using ::fputwc;
- using ::fputws;
- using ::fwide;
- using ::fwprintf;
- using ::fwscanf;
- using ::getwc;
- using ::getwchar;
- using ::mbrlen;
- using ::mbrtowc;
- using ::mbsinit;
- using ::mbsrtowcs;
- using ::putwc;
- using ::putwchar;
- using ::swprintf;
- using ::swscanf;
- using ::ungetwc;
- using ::vfwprintf;
- using ::vswprintf;
- using ::vwprintf;
- using ::wcrtomb;
- using ::wcscat;
- using ::wcschr;
- using ::wcscmp;
- using ::wcscoll;
- using ::wcscpy;
- using ::wcscspn;
- using ::wcsftime;
- using ::wcslen;
- using ::wcsncat;
- using ::wcsncmp;
- using ::wcsncpy;
- using ::wcspbrk;
- using ::wcsrchr;
- using ::wcsrtombs;
- using ::wcsspn;
- using ::wcsstr;
- using ::wcstod;
- using ::wcstok;
- using ::wcstol;
using ::wcstold;
using ::wcstoll;
- using ::wcstoul;
using ::wcstoull;
- using ::wcsxfrm;
- using ::wctob;
- using ::wmemchr;
- using ::wmemcmp;
- using ::wmemcpy;
- using ::wmemmove;
- using ::wmemset;
- using ::wprintf;
- using ::wscanf;
}
],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
[AC_DEFINE(HAVE_ISWBLANK,1,
[Defined if iswblank exists.])],[])
- AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
AC_MSG_RESULT($ac_c99_wchar)
fi
AC_LANG_RESTORE
])
+dnl
+dnl Check whether "dev/random" and "dev/urandom" are available for the
+dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
+dnl
+AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
+
+ AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
+ AC_CACHE_VAL(ac_random_tr1, [
+ AC_TRY_RUN([#include <stdio.h>
+ int main()
+ {
+ return !(fopen("/dev/random", "r")
+ && fopen("/dev/urandom", "r"));
+ }
+ ],
+ [ac_random_tr1=yes], [ac_random_tr1=no],
+ [ac_random_tr1=no])
+ ])
+ AC_MSG_RESULT($ac_random_tr1)
+ if test x"$ac_random_tr1" = x"yes"; then
+ AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
+ [Define if dev/random and dev/urandom are available for
+ the random_device of TR1 (Chapter 5.1).])
+ fi
+
+])
dnl
dnl Check for what type of C headers to use.
dnl --enable-cheaders= [does stuff].
dnl --disable-cheaders [does not do anything, really].
dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
-dnl Where DEFAULT is either `c' or `c_std'.
+dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
dnl
AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
GLIBCXX_ENABLE(cheaders,$1,[=KIND],
- [construct "C" headers for g++], [permit c|c_std])
+ [construct "C" headers for g++], [permit c|c_std|c_global])
AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
+ # Allow overrides to configure.host here.
+ if test $enable_cheaders = c_global; then
+ c_compatibility=yes
+ fi
+
+ if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
+ c_extra=yes
+ fi
+
AC_SUBST(C_INCLUDE_DIR)
GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
+ GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
+ GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
])
dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
dnl Where DEFAULT is either `yes' or `no'.
dnl
-dnl Necessary support (probed along with C99 support) must also be present.
+dnl Necessary support must also be present.
dnl
AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
- if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
+
+ # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
+ AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
+ AC_MSG_CHECKING([for mbstate_t])
+ AC_TRY_COMPILE([#include <wchar.h>],
+ [mbstate_t teststate;],
+ have_mbstate_t=yes, have_mbstate_t=no)
+ AC_MSG_RESULT($have_mbstate_t)
+ if test x"$have_mbstate_t" = xyes; then
+ AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
+ fi
+
+ # Test it always, for use in GLIBCXX_ENABLE_C99, together with
+ # ac_has_wchar_h.
+ AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
+
+ if test x"$enable_wchar_t" = x"yes"; then
+
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+
+ if test x"$ac_has_wchar_h" = xyes &&
+ test x"$ac_has_wctype_h" = xyes; then
+ AC_TRY_COMPILE([#include <wchar.h>
+ #include <stddef.h>
+ wint_t i;
+ long l = WEOF;
+ long j = WCHAR_MIN;
+ long k = WCHAR_MAX;
+ namespace test
+ {
+ using ::btowc;
+ using ::fgetwc;
+ using ::fgetws;
+ using ::fputwc;
+ using ::fputws;
+ using ::fwide;
+ using ::fwprintf;
+ using ::fwscanf;
+ using ::getwc;
+ using ::getwchar;
+ using ::mbrlen;
+ using ::mbrtowc;
+ using ::mbsinit;
+ using ::mbsrtowcs;
+ using ::putwc;
+ using ::putwchar;
+ using ::swprintf;
+ using ::swscanf;
+ using ::ungetwc;
+ using ::vfwprintf;
+ using ::vswprintf;
+ using ::vwprintf;
+ using ::wcrtomb;
+ using ::wcscat;
+ using ::wcschr;
+ using ::wcscmp;
+ using ::wcscoll;
+ using ::wcscpy;
+ using ::wcscspn;
+ using ::wcsftime;
+ using ::wcslen;
+ using ::wcsncat;
+ using ::wcsncmp;
+ using ::wcsncpy;
+ using ::wcspbrk;
+ using ::wcsrchr;
+ using ::wcsrtombs;
+ using ::wcsspn;
+ using ::wcsstr;
+ using ::wcstod;
+ using ::wcstok;
+ using ::wcstol;
+ using ::wcstoul;
+ using ::wcsxfrm;
+ using ::wctob;
+ using ::wmemchr;
+ using ::wmemcmp;
+ using ::wmemcpy;
+ using ::wmemmove;
+ using ::wmemset;
+ using ::wprintf;
+ using ::wscanf;
+ }
+ ],[],[], [enable_wchar_t=no])
+ else
+ enable_wchar_t=no
+ fi
+
+ AC_LANG_RESTORE
+ fi
+
+ if test x"$enable_wchar_t" = x"yes"; then
AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
[Define if code specialized for wchar_t should be used.])
fi
+
AC_MSG_CHECKING([for enabled wchar_t specializations])
AC_MSG_RESULT([$enable_wchar_t])
])
GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
if test $enable_libstdcxx_pch = yes; then
- glibcxx_PCHFLAGS="-include bits/stdc++.h"
+ glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
else
glibcxx_PCHFLAGS=""
fi
dnl
+dnl Check for atomic builtins.
+dnl See:
+dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
+dnl
+dnl This checks to see if the host supports the compiler-generated
+dnl builtins for atomic operations. Note, this is intended to be an
+dnl all-or-nothing switch, so all the atomic operations that are used
+dnl should be checked.
+dnl
+dnl Note:
+dnl libgomp and libgfortran do this with a link test, instead of an asm test.
+dnl see: CHECK_SYNC_FETCH_AND_ADD
+dnl
+dnl Defines:
+dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
+dnl
+AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
+ AC_MSG_CHECKING([for atomic builtins])
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+
+ # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
+ cat > conftest.$ac_ext << EOF
+[#]line __oline__ "configure"
+int main()
+{
+ // NB: _Atomic_word not necessarily int.
+ typedef int atomic_type;
+ atomic_type c1;
+ atomic_type c2;
+ const atomic_type c3(0);
+ if (__sync_fetch_and_add(&c1, c2) == c3)
+ {
+ // Do something.
+ }
+ return 0;
+}
+EOF
+ old_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS=-S
+ if AC_TRY_EVAL(ac_compile); then
+ if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
+ enable_atomic_builtins=no
+ else
+ AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
+ [Define if builtin atomic operations are supported on this host.])
+ enable_atomic_builtins=yes
+ atomicity_dir=cpu/generic/atomicity_builtins
+ fi
+ fi
+ CXXFLAGS="$old_CXXFLAGS"
+ rm -f conftest*
+
+ # Now, if still generic, set to mutex.
+ if test $atomicity_dir = "cpu/generic" ; then
+ atomicity_dir=cpu/generic/atomicity_mutex
+ fi
+ AC_LANG_RESTORE
+ AC_MSG_RESULT($enable_atomic_builtins)
+])
+
+
+dnl
dnl Check for exception handling support. If an explicit enable/disable
dnl sjlj exceptions is given, we don't have to detect. Otherwise the
dnl target may or may not support call frame exceptions.
dnl
+dnl Allow visibility attributes to be used on namespaces, objects, etc.
+dnl
+dnl --enable-visibility enables attempt to use visibility attributes.
+dnl --disable-visibility turns off all use of visibility attributes.
+dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
+dnl Where DEFAULT is 'yes'.
+dnl
+AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
+GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
+
+if test x$enable_visibility = xyes ; then
+ dnl all hail libgfortran
+ dnl Check whether the target supports hidden visibility.
+ AC_CACHE_CHECK([whether the target supports hidden visibility],
+ have_attribute_visibility, [
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror"
+ AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
+ [], have_attribute_visibility=yes,
+ have_attribute_visibility=no)
+ CFLAGS="$save_CFLAGS"])
+ if test $have_attribute_visibility = no; then
+ enable_visibility=no
+ fi
+fi
+
+GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
+AC_MSG_NOTICE([visibility supported: $enable_visibility])
+])
+
+
+dnl
dnl Add version tags to symbols in shared library (or not), additionally
dnl marking other symbols as private/local (or not).
dnl
# Turn a 'yes' into a suitable default.
if test x$enable_symvers = xyes ; then
- if test $enable_shared = no || test "x$LD" = x ; then
+ if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
enable_symvers=no
else
if test $with_gnu_ld = yes ; then
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