From: Joseph Myers <joseph@codesourcery.com>
Date: Sun, 11 Oct 2015 22:34:28 +0000 (+0100)
Subject: Test for __cxa_thread_atexit_impl when cross-compiling libstdc++ for GNU targets.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3c97fe777c8534555ae4c5371aa9d9a643fe9e2f;p=gcc.git

Test for __cxa_thread_atexit_impl when cross-compiling libstdc++ for GNU targets.

I noticed that when testing glibc with a cross compiler I got

UNSUPPORTED: nptl/tst-thread_local1

because the libstdc++-v3 configuration for cross compiling defaulted
to __cxa_thread_atexit_impl not being available.  This patch fixes
GLIBCXX_CROSSCONFIG to run the same test (for the case covering
targets with glibc) for __cxa_thread_atexit_impl as for native
compilation, just as it runs most of the other tests done for native
compilation (for these targets, it's not possible to build libstdc++
without already having built libc, so link tests are OK).

Tested with no regressions for cross to arm-none-linux-gnueabi.

	* crossconfig.m4 (GLIBCXX_CROSSCONFIG) <*-linux* | *-uclinux* |
	*-gnu* | *-kfreebsd*-gnu | *-knetbsd*-gnu | *-cygwin*>: Check for
	__cxa_thread_atexit_impl.
	* configure: Regenerate.

From-SVN: r228695
---

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a6bb000996c..e3061efca4f 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2015-10-11  Joseph Myers  <joseph@codesourcery.com>
+
+	* crossconfig.m4 (GLIBCXX_CROSSCONFIG) <*-linux* | *-uclinux* |
+	*-gnu* | *-kfreebsd*-gnu | *-knetbsd*-gnu | *-cygwin*>: Check for
+	__cxa_thread_atexit_impl.
+	* configure: Regenerate.
+
 2015-10-09  Jonathan Wakely  <jwakely@redhat.com>
 
 	* include/experimental/erase_if.h: Move to ...
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 73d45b1a680..1eb6db4ec4c 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -58893,6 +58893,17 @@ $as_echo "$gcc_cv_have_tls" >&6; }
 $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
+
 
 
 
diff --git a/libstdc++-v3/crossconfig.m4 b/libstdc++-v3/crossconfig.m4
index 10247f940b5..ece12567794 100644
--- a/libstdc++-v3/crossconfig.m4
+++ b/libstdc++-v3/crossconfig.m4
@@ -156,6 +156,7 @@ case "${host}" in
     GLIBCXX_CHECK_STDLIB_SUPPORT
     AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1)
     GCC_CHECK_TLS
+    AC_CHECK_FUNCS(__cxa_thread_atexit_impl)
     AM_ICONV
     ;;
   *-mingw32*)