configure.ac: Check for __cxa_thread_atexit_impl.

	* configure.ac: Check for __cxa_thread_atexit_impl.
	* libsupc++/atexit_thread.cc (__cxa_thread_atexit): Just forward
	to it if available.
	* config.h.in, configure: Regenerate.

From-SVN: r196276

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 8e4d68f77b5c02a3132758bce063fee896a4083d..7681c73725ef56872b0a5079e9304bdd666198a1 100644 (file)
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2013-02-25  Jason Merrill  <jason@redhat.com>
+
+       * configure.ac: Check for __cxa_thread_atexit_impl.
+       * libsupc++/atexit_thread.cc (__cxa_thread_atexit): Just forward
+       to it if available.
+       * config.h.in, configure: Regenerate.
+
 2013-02-20  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
        * include/std/streambuf (basic_streambuf): Use injected class name

diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 59a7fae0fbde385ef2dcecff9bd67abd688d3bbf..07a1e50be1f794fb39dec7482999f33bd378c48b 100644 (file)
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -658,6 +658,9 @@
 /* Define to 1 if you have the `_tanl' function. */
 #undef HAVE__TANL
 
+/* Define to 1 if you have the `__cxa_thread_atexit_impl' function. */
+#undef HAVE___CXA_THREAD_ATEXIT_IMPL
+
 /* Define as const if the declaration of iconv() needs const. */
 #undef ICONV_CONST
 

diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 008ccbfc9a32b7faa5e9bee554a1429a8120b674..bf397f5cf12406003542e59eca586ca8803caf2c 100755 (executable)
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -26700,6 +26700,18 @@ $as_echo "#define HAVE_TLS 1" >>confdefs.h
 
   fi
 
+  for ac_func in __cxa_thread_atexit_impl
+do :
+  ac_fn_c_check_func "$LINENO" "__cxa_thread_atexit_impl" "ac_cv_func___cxa_thread_atexit_impl"
+if test "x$ac_cv_func___cxa_thread_atexit_impl" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE___CXA_THREAD_ATEXIT_IMPL 1
+_ACEOF
+
+fi
+done
+
+
   # For iconv support.
 
       if test "X$prefix" = "XNONE"; then

diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index 66164a22628b31d19091657e1515b8d3df3abbce..a64fee28c2cabdabfc3bbf90f2df93799ef2f199 100644 (file)
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -235,6 +235,8 @@ if $GLIBCXX_IS_NATIVE; then
   # For TLS support.
   GCC_CHECK_TLS
 
+  AC_CHECK_FUNCS(__cxa_thread_atexit_impl)
+
   # For iconv support.
   AM_ICONV
 

diff --git a/libstdc++-v3/libsupc++/atexit_thread.cc b/libstdc++-v3/libsupc++/atexit_thread.cc
index da8571c82d3d3834a8d79a7920639be8f2c695a5..3b33df233e817184fb14b3804e94480b595b7fd9 100644 (file)
--- a/libstdc++-v3/libsupc++/atexit_thread.cc
+++ b/libstdc++-v3/libsupc++/atexit_thread.cc
@@ -26,6 +26,20 @@
 #include <new>
 #include "bits/gthr.h"
 
+#if HAVE___CXA_THREAD_ATEXIT_IMPL
+
+extern "C" int __cxa_thread_atexit_impl (void (*func) (void *),
+                                        void *arg, void *d);
+extern "C" int
+__cxxabiv1::__cxa_thread_atexit (void (*dtor)(void *),
+                                void *obj, void *dso_handle)
+  _GLIBCXX_NOTHROW
+{
+  return __cxa_thread_atexit_impl (dtor, obj, dso_handle);
+}
+
+#else /* HAVE___CXA_THREAD_ATEXIT_IMPL */
+
 namespace {
   // One element in a singly-linked stack of cleanups.
   struct elt
@@ -116,3 +130,5 @@ __cxxabiv1::__cxa_thread_atexit (void (*dtor)(void *), void *obj, void */*dso_ha
 
   return 0;
 }
+
+#endif /* HAVE___CXA_THREAD_ATEXIT_IMPL */