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authorRoland McGrath <roland@gnu.org>2002-10-15 22:50:43 +0000
committerRoland McGrath <roland@gnu.org>2002-10-15 22:50:43 +0000
commit9b21e6bcf8986e076ca8aa4862bb76b76605e591 (patch)
tree9654d1175dfcc8eb8d7cfd9dc8958b207d988e4f /configure.in
parent146a03db8950595fe7ce64e4c9c397746d92d4b9 (diff)
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2002-10-16 Jakub Jelinek <jakub@redhat.com>
	* include/libc-symbols.h (attribute_tls_model_ie): Define.
	* include/errno.h (errno): Define to __libc_errno in libc.so.
	Add attribute_tls_model_ie.
	* include/netdb.h (h_errno): Define to __libc_h_errno in libc.so.
	Add attribute_tls_model_ie.
	* include/resolv.h (_res): Define to __libc_res in libc.so.  Add
	attribute_tls_model_ie.
	* inet/herrno.c (__libc_h_errno): Add hidden alias to h_errno.
	(h_errno): Define.
	* resolv/res_libc.c (__libc_res): Add hidden alias to _res.
	(_res): Define.
	* sysdeps/generic/bits/libc-tsd.h (__libc_tsd_define): Add
	attribute_tls_model_ie.
	* sysdeps/generic/errno-loc.c (errno): Only undefine if not using
	__thread.
	* sysdeps/generic/errno.c (__libc_errno): Add hidden alias to errno.
	* sysdeps/unix/sysv/linux/i386/sysdep.h (SYSCALL_ERROR_HANDLER): Use
	__libc_errno in USE___THREAD case.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h (SYSCALL_ERROR_HANDLER):
	Likewise.
	* configure.in (HAVE_TLS_MODEL_ATTRIBUTE): Check for
	__attribute__((tls_model (""))).
	* configure: Rebuilt.
	* config.h.in (HAVE_TLS_MODEL_ATTRIBUTE): Add.
Diffstat (limited to 'configure.in')
-rw-r--r--configure.in16
1 files changed, 16 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index c115be5414..89830313a1 100644
--- a/configure.in
+++ b/configure.in
@@ -1624,6 +1624,22 @@ if test "$libc_cv_gcc___thread" = yes; then
   AC_DEFINE(HAVE___THREAD)
 fi
 
+if test "$libc_cv_gcc___thread" = yes; then
+  dnl Check whether the compiler supports the tls_model attribute.
+  AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl
+  cat > conftest.c <<\EOF
+extern __thread int a __attribute__((tls_model ("initial-exec")));
+EOF
+  if AC_TRY_COMMAND([${CC-cc} $CFLAGS -S -Werror conftest.c >&AC_FD_CC]); then
+    libc_cv_gcc_tls_model_attr=yes
+  else
+    libc_cv_gcc_tls_model_attr=no
+  fi
+  rm -f conftest*])
+  if test "$libc_cv_gcc_tls_model_attr" = yes; then
+    AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE)
+  fi
+fi
 
 dnl Check whether we have the gd library available.
 AC_MSG_CHECKING(for libgd)