From a8c075f72b231c37823661ba0d7d082a21cd39d9 Mon Sep 17 00:00:00 2001 From: Dan Albert Date: Tue, 13 Oct 2015 16:28:19 -0700 Subject: Remove gcc-4.8. Change-Id: Iee9c6985c613f58c82e33a91722d371579eb290f --- gcc-4.8/config/tls.m4 | 129 -------------------------------------------------- 1 file changed, 129 deletions(-) delete mode 100644 gcc-4.8/config/tls.m4 (limited to 'gcc-4.8/config/tls.m4') diff --git a/gcc-4.8/config/tls.m4 b/gcc-4.8/config/tls.m4 deleted file mode 100644 index 4e170c8d6..000000000 --- a/gcc-4.8/config/tls.m4 +++ /dev/null @@ -1,129 +0,0 @@ -dnl Check whether the target supports TLS. -AC_DEFUN([GCC_CHECK_TLS], [ - AC_REQUIRE([AC_CANONICAL_HOST]) - GCC_ENABLE(tls, yes, [], [Use thread-local storage]) - AC_CACHE_CHECK([whether the target supports thread-local storage], - gcc_cv_have_tls, [ - AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }], - [dnl If the test case passed with dynamic linking, try again with - dnl static linking, but only if static linking is supported (not - dnl on Solaris 10). This fails with some older Red Hat releases. - chktls_save_LDFLAGS="$LDFLAGS" - LDFLAGS="-static $LDFLAGS" - AC_LINK_IFELSE([int main() { return 0; }], - [AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }], - [gcc_cv_have_tls=yes], [gcc_cv_have_tls=no],[])], - [gcc_cv_have_tls=yes]) - LDFLAGS="$chktls_save_LDFLAGS" - if test $gcc_cv_have_tls = yes; then - dnl So far, the binutils and the compiler support TLS. - dnl Also check whether the libc supports TLS, i.e. whether a variable - dnl with __thread linkage has a different address in different threads. - dnl First, find the thread_CFLAGS necessary for linking a program that - dnl calls pthread_create. - chktls_save_CFLAGS="$CFLAGS" - thread_CFLAGS=failed - for flag in '' '-pthread' '-lpthread'; do - CFLAGS="$flag $chktls_save_CFLAGS" - AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [#include - void *g(void *d) { return NULL; }], - [pthread_t t; pthread_create(&t,NULL,g,NULL);])], - [thread_CFLAGS="$flag"]) - if test "X$thread_CFLAGS" != Xfailed; then - break - fi - done - CFLAGS="$chktls_save_CFLAGS" - if test "X$thread_CFLAGS" != Xfailed; then - CFLAGS="$thread_CFLAGS $chktls_save_CFLAGS" - dnl Test for an old glibc bug that violated the __thread property. - dnl Use volatile to ensure the compiler won't optimize away pointer - dnl accesses it might otherwise assume to be redundant, or reorder - dnl them and reuse storage, which might lead to them pointing to - dnl the same location. - AC_RUN_IFELSE( - [AC_LANG_PROGRAM( - [#include - __thread int a; - static int *volatile a_in_other_thread; - static void * - thread_func (void *arg) - { - a_in_other_thread = &a; - return (void *)0; - }], - [pthread_t thread; - void *thread_retval; - int *volatile a_in_main_thread; - a_in_main_thread = &a; - if (pthread_create (&thread, (pthread_attr_t *)0, - thread_func, (void *)0)) - return 0; - if (pthread_join (thread, &thread_retval)) - return 0; - return (a_in_other_thread == a_in_main_thread);])], - [gcc_cv_have_tls=yes], [gcc_cv_have_tls=no], []) - CFLAGS="$chktls_save_CFLAGS" - fi - fi], - [gcc_cv_have_tls=no], - [dnl This is the cross-compiling case. Assume libc supports TLS if the - dnl binutils and the compiler do. - AC_LINK_IFELSE([__thread int a; int b; int main() { return a = b; }], - [chktls_save_LDFLAGS="$LDFLAGS" - dnl Shared library options may depend on the host; this check - dnl is only known to be needed for GNU/Linux. - case $host in - *-*-linux*) - LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS" - ;; - esac - chktls_save_CFLAGS="$CFLAGS" - CFLAGS="-fPIC $CFLAGS" - dnl If -shared works, test if TLS works in a shared library. - AC_LINK_IFELSE([int f() { return 0; }], - [AC_LINK_IFELSE([__thread int a; int b; int f() { return a = b; }], - [gcc_cv_have_tls=yes], - [gcc_cv_have_tls=no])], - [gcc_cv_have_tls=yes]) - CFLAGS="$chktls_save_CFLAGS" - LDFLAGS="$chktls_save_LDFLAGS"], [gcc_cv_have_tls=no]) - ] - )]) - if test "$enable_tls $gcc_cv_have_tls" = "yes yes"; then - AC_DEFINE(HAVE_TLS, 1, - [Define to 1 if the target supports thread-local storage.]) - fi]) - -dnl Check whether the target assembler supports TLS. -AC_DEFUN([GCC_CHECK_CC_TLS], [ - GCC_ENABLE(tls, yes, [], [Use thread-local storage]) - AC_CACHE_CHECK([whether the target assembler supports thread-local storage], - gcc_cv_have_cc_tls, [ - AC_COMPILE_IFELSE([__thread int a; int b; int main() { return a = b; }], - [gcc_cv_have_cc_tls=yes], [gcc_cv_have_cc_tls=no])] - )]) - if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then - AC_DEFINE(HAVE_CC_TLS, 1, - [Define to 1 if the target assembler supports thread-local storage.]) - fi]) - -dnl Check whether TLS is emulated. -AC_DEFUN([GCC_CHECK_EMUTLS], [ - AC_CACHE_CHECK([whether the thread-local storage support is from emutls], - gcc_cv_use_emutls, [ - gcc_cv_use_emutls=no - echo '__thread int a; int b; int main() { return a = b; }' > conftest.c - if AC_TRY_COMMAND(${CC-cc} -Werror -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD); then - if grep __emutls_get_address conftest.s > /dev/null; then - gcc_cv_use_emutls=yes - fi - fi - rm -f conftest.* - ]) - if test "$gcc_cv_use_emutls" = "yes" ; then - AC_DEFINE(USE_EMUTLS, 1, - [Define to 1 if the target use emutls for thread-local storage.]) - fi]) -- cgit v1.2.3