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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)