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Test for C99 stdlib.h functions with -std=c++98

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PR libstdc++/69626
	* acinclude.m4 (GLIBCXX_ENABLE_C99): Check C99 stdlib.h functions
	with -std=c++98 and define _GLIBCXX98_USE_C99_STDLIB.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* testsuite/21_strings/c_strings/char/69626.cc: New.

From-SVN: r233161
This commit is contained in:
Jonathan Wakely 2016-02-04 23:47:21 +00:00 committed by Jonathan Wakely
parent 171dc40ede
commit 3555173fb9
5 changed files with 156 additions and 0 deletions
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7
libstdc++-v3/ChangeLog
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@ -1,5 +1,12 @@
2016-02-04 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/69626
* acinclude.m4 (GLIBCXX_ENABLE_C99): Check C99 stdlib.h functions
with -std=c++98 and define _GLIBCXX98_USE_C99_STDLIB.
* config.h.in: Regenerate.
* configure: Regenerate.
* testsuite/21_strings/c_strings/char/69626.cc: New.
* doc/html/index.html: Regenerate.
* doc/xml/manual/containers.xml: Add cross-reference to Dual ABI.

29
libstdc++-v3/acinclude.m4
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@ -1059,6 +1059,35 @@ AC_DEFUN([GLIBCXX_ENABLE_C99], [
in <cstdio> in namespace std for C++98.])
fi
# Check for the existence in <stdlib.h> of lldiv_t, et. al.
AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98])
AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [
GCC_TRY_COMPILE_OR_LINK(
[#include <stdlib.h>
volatile float f;
volatile long double ld;
volatile unsigned long long ll;
lldiv_t mydivt;],
[char* tmp;
f = strtof("gnu", &tmp);
ld = strtold("gnu", &tmp);
ll = strtoll("gnu", &tmp, 10);
ll = strtoull("gnu", &tmp, 10);
ll = llabs(10);
mydivt = lldiv(10,1);
ll = mydivt.quot;
ll = mydivt.rem;
ll = atoll("10");
_Exit(0);
], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no])
])
AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98)
if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1,
[Define if C99 functions or macros in <stdlib.h> should be imported
in <cstdlib> in namespace std for C++98.])
fi
# Check for the existence in <wchar.h> of wcstold, etc.
if test x"$ac_has_wchar_h" = xyes &&
test x"$ac_has_wctype_h" = xyes; then

4
libstdc++-v3/config.h.in
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@ -771,6 +771,10 @@
<cstdio> in namespace std for C++98. */
#undef _GLIBCXX98_USE_C99_STDIO
/* Define if C99 functions or macros in <stdlib.h> should be imported in
<cstdlib> in namespace std for C++98. */
#undef _GLIBCXX98_USE_C99_STDLIB
/* Define if C99 functions or macros in <wchar.h> should be imported in
<cwchar> in namespace std for C++98. */
#undef _GLIBCXX98_USE_C99_WCHAR

89
libstdc++-v3/configure vendored
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@ -16970,6 +16970,95 @@ $as_echo "#define _GLIBCXX98_USE_C99_STDIO 1" >>confdefs.h
fi
# Check for the existence in <stdlib.h> of lldiv_t, et. al.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ISO C99 support in <stdlib.h> for C++98" >&5
$as_echo_n "checking for ISO C99 support in <stdlib.h> for C++98... " >&6; }
if test "${glibcxx_cv_c99_stdlib_cxx98+set}" = set; then :
$as_echo_n "(cached) " >&6
else
if test x$gcc_no_link = xyes; then
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <stdlib.h>
volatile float f;
volatile long double ld;
volatile unsigned long long ll;
lldiv_t mydivt;
int
main ()
{
char* tmp;
f = strtof("gnu", &tmp);
ld = strtold("gnu", &tmp);
ll = strtoll("gnu", &tmp, 10);
ll = strtoull("gnu", &tmp, 10);
ll = llabs(10);
mydivt = lldiv(10,1);
ll = mydivt.quot;
ll = mydivt.rem;
ll = atoll("10");
_Exit(0);
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
glibcxx_cv_c99_stdlib_cxx98=yes
else
glibcxx_cv_c99_stdlib_cxx98=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
else
if test x$gcc_no_link = xyes; then
as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
fi
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <stdlib.h>
volatile float f;
volatile long double ld;
volatile unsigned long long ll;
lldiv_t mydivt;
int
main ()
{
char* tmp;
f = strtof("gnu", &tmp);
ld = strtold("gnu", &tmp);
ll = strtoll("gnu", &tmp, 10);
ll = strtoull("gnu", &tmp, 10);
ll = llabs(10);
mydivt = lldiv(10,1);
ll = mydivt.quot;
ll = mydivt.rem;
ll = atoll("10");
_Exit(0);
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_link "$LINENO"; then :
glibcxx_cv_c99_stdlib_cxx98=yes
else
glibcxx_cv_c99_stdlib_cxx98=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_c99_stdlib_cxx98" >&5
$as_echo "$glibcxx_cv_c99_stdlib_cxx98" >&6; }
if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
$as_echo "#define _GLIBCXX98_USE_C99_STDLIB 1" >>confdefs.h
fi
# Check for the existence in <wchar.h> of wcstold, etc.
if test x"$ac_has_wchar_h" = xyes &&
test x"$ac_has_wctype_h" = xyes; then

27
libstdc++-v3/testsuite/21_strings/c_strings/char/69626.cc Normal file
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@ -0,0 +1,27 @@
// Copyright (C) 2016 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++98" }
// { dg-do compile { target *-*-linux-gnu } }
#include <cstdlib>
long long test01()
{
char* ep;
return std::strtoll("0", &ep, 10);
}