acinclude.m4 (GLIBCXX_CHECK_TMPNAM): New check for tmpnam function.

2014-01-23  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
	    Steve Ellcey  <sellcey@mips.com>

	* acinclude.m4 (GLIBCXX_CHECK_TMPNAM): New check for tmpnam
	function.
	* configure.ac: Use GLIBCXX_CHECK_TMPNAM.
	* (configure, config.h.in): Regenerate.
	* include/c_global/cstdio: Guard ::tmpnam with _GLIBCXX_USE_TMPNAM

Co-Authored-By: Steve Ellcey <sellcey@mips.com>

From-SVN: r207009

6 files changed, 119 insertions, 0 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f5cfe01..211f731 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2014-01-23  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
+	    Steve Ellcey  <sellcey@mips.com>
+
+	* acinclude.m4 (GLIBCXX_CHECK_TMPNAM): New check for tmpnam
+	function.
+	* configure.ac: Use GLIBCXX_CHECK_TMPNAM.
+	* (configure, config.h.in): Regenerate.
+	* include/c_global/cstdio: Guard ::tmpnam with _GLIBCXX_USE_TMPNAM
+
 2014-01-23  Jonathan Wakely  <jwakely@redhat.com>
 
 	* doc/xml/faq.xml (a-how_to_set_paths): Expand FAQ answer.
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index fcdcd9a..2b60696 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -3771,6 +3771,33 @@ AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
   GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
 ])
 
+dnl
+dnl Check whether obsolescent tmpnam is available in <stdio.h>,
+dnl and define _GLIBCXX_USE_TMPNAM.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
+dnl
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+dnl
+  AC_MSG_CHECKING([for tmpnam])
+  AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
+    GCC_TRY_COMPILE_OR_LINK(
+      [#include <stdio.h>],
+      [char *tmp = tmpnam(NULL);],
+      [glibcxx_cv_TMPNAM=yes],
+      [glibcxx_cv_TMPNAM=no])
+  ])
+  if test $glibcxx_cv_TMPNAM = yes; then
+    AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_TMPNAM)
+dnl
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
 
 dnl
 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 4c029d2..adc7d44 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -867,6 +867,9 @@
 /* Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>. */
 #undef _GLIBCXX_USE_SYSCTL_HW_NCPU
 
+/* Define if obsolescent tmpnam is available in <stdio.h>. */
+#undef _GLIBCXX_USE_TMPNAM
+
 /* Define if code specialized for wchar_t should be used. */
 #undef _GLIBCXX_USE_WCHAR_T
 
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 448bee3..d279951 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -20120,6 +20120,81 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+# Check for tmpnam which is obsolescent in POSIX.1-2008
+
+  ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -fno-exceptions"
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tmpnam" >&5
+$as_echo_n "checking for tmpnam... " >&6; }
+  if test "${glibcxx_cv_TMPNAM+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+      if test x$gcc_no_link = xyes; then
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+char *tmp = tmpnam(NULL);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  glibcxx_cv_TMPNAM=yes
+else
+  glibcxx_cv_TMPNAM=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.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+char *tmp = tmpnam(NULL);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  glibcxx_cv_TMPNAM=yes
+else
+  glibcxx_cv_TMPNAM=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
+fi
+
+  if test $glibcxx_cv_TMPNAM = yes; then
+
+$as_echo "#define _GLIBCXX_USE_TMPNAM 1" >>confdefs.h
+
+  fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_TMPNAM" >&5
+$as_echo "$glibcxx_cv_TMPNAM" >&6; }
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
 
   ac_fn_c_check_header_mongrel "$LINENO" "locale.h" "ac_cv_header_locale_h" "$ac_includes_default"
 if test "x$ac_cv_header_locale_h" = x""yes; then :
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index 22fc840..1de0f6c 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -213,6 +213,9 @@ GLIBCXX_CHECK_GETTIMEOFDAY
 # For clock_gettime, nanosleep and sched_yield support.
 GLIBCXX_ENABLE_LIBSTDCXX_TIME
 
+# Check for tmpnam which is obsolescent in POSIX.1-2008
+GLIBCXX_CHECK_TMPNAM
+
 AC_LC_MESSAGES
 
 # For hardware_concurrency
diff --git a/libstdc++-v3/include/c_global/cstdio b/libstdc++-v3/include/c_global/cstdio
index 25d9422..6043b3d 100644
--- a/libstdc++-v3/include/c_global/cstdio
+++ b/libstdc++-v3/include/c_global/cstdio
@@ -137,7 +137,9 @@ namespace std
   using ::sprintf;
   using ::sscanf;
   using ::tmpfile;
+#if _GLIBCXX_USE_TMPNAM
   using ::tmpnam;
+#endif
   using ::ungetc;
   using ::vfprintf;
   using ::vprintf;