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authorJoseph Myers <joseph@codesourcery.com>2015-10-27 10:48:05 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-10-27 10:48:05 +0000
commit7a4cb4ad1130e43e1256f85cea38a3227320f944 (patch)
tree94076fad4cc4e997011f65d0b6e2a0b9044bbc8d /configure.ac
parente4f5eae8f004f236db11325df2adf338766c0543 (diff)
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Remove TLS configure tests.
There seemed to be support in response to <https://sourceware.org/ml/libc-alpha/2015-10/msg00510.html> for removing configure tests that exist only to produce errors, where we expect that tool versions failing the tests would also fail the tests of minimum GCC / binutils versions. This patch removes the tests for TLS support as one instance of such tests. Since the addition of TLS emulation support in GCC 4.3, I don't think these tests would have failed even if proper TLS support (as required by glibc) was missing in that architecture's GCC back end, so any new glibc ports wanting a substantive test (if there are actual GCC or binutils versions for those architectures, with supported version numbers, missing TLS support) would have needed an architecture-specific test anyway. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_gcc___thread): Remove configure test. (libc_cv_gcc_tls_model_attr): Likewise. * configure: Regenerated.
Diffstat (limited to 'configure.ac')
-rw-r--r--configure.ac30
1 files changed, 0 insertions, 30 deletions
diff --git a/configure.ac b/configure.ac
index 4879c48db7..1be44f596e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1564,36 +1564,6 @@ if test "$libc_cv_gcc_builtin_redirection" = no; then
AC_MSG_ERROR([support for the symbol redirection needed])
fi
-dnl Check whether the compiler supports the __thread keyword.
-AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
-[cat > conftest.c <<\EOF
-__thread int a = 42;
-EOF
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
- libc_cv_gcc___thread=yes
-else
- libc_cv_gcc___thread=no
-fi
-rm -f conftest*])
-if test "$libc_cv_gcc___thread" = no; then
- AC_MSG_ERROR([support for the __thread keyword is required])
-fi
-
-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 $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then
- libc_cv_gcc_tls_model_attr=yes
-else
- libc_cv_gcc_tls_model_attr=no
-fi
-rm -f conftest*])
-if test "$libc_cv_gcc_tls_model_attr" = no; then
- AC_MSG_ERROR([support for the tls_model attribute is required])
-fi
-
dnl Determine how to disable generation of FMA instructions.
AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions],
libc_cv_cc_nofma, [dnl