aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
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
parente4f5eae8f004f236db11325df2adf338766c0543 (diff)
downloadglibc-7a4cb4ad1130e43e1256f85cea38a3227320f944.zip
glibc-7a4cb4ad1130e43e1256f85cea38a3227320f944.tar.gz
glibc-7a4cb4ad1130e43e1256f85cea38a3227320f944.tar.bz2
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.
-rw-r--r--ChangeLog4
-rwxr-xr-xconfigure52
-rw-r--r--configure.ac30
3 files changed, 4 insertions, 82 deletions
diff --git a/ChangeLog b/ChangeLog
index 38cb052..4ce7a92 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
2015-10-27 Joseph Myers <joseph@codesourcery.com>
+ * configure.ac (libc_cv_gcc___thread): Remove configure test.
+ (libc_cv_gcc_tls_model_attr): Likewise.
+ * configure: Regenerated.
+
* configure.ac (libc_cv_need_minus_P): Remove configure test.
* configure: Regenerated.
* Makeconfig (asm-CPPFLAGS): Remove reference to -P in comment.
diff --git a/configure b/configure
index 1e9eba1..45708b1 100755
--- a/configure
+++ b/configure
@@ -6142,58 +6142,6 @@ if test "$libc_cv_gcc_builtin_redirection" = no; then
as_fn_error $? "support for the symbol redirection needed" "$LINENO" 5
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __thread" >&5
-$as_echo_n "checking for __thread... " >&6; }
-if ${libc_cv_gcc___thread+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- cat > conftest.c <<\EOF
-__thread int a = 42;
-EOF
-if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&5'
- { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
- (eval $ac_try) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; }; then
- libc_cv_gcc___thread=yes
-else
- libc_cv_gcc___thread=no
-fi
-rm -f conftest*
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc___thread" >&5
-$as_echo "$libc_cv_gcc___thread" >&6; }
-if test "$libc_cv_gcc___thread" = no; then
- as_fn_error $? "support for the __thread keyword is required" "$LINENO" 5
-fi
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for tls_model attribute" >&5
-$as_echo_n "checking for tls_model attribute... " >&6; }
-if ${libc_cv_gcc_tls_model_attr+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- cat > conftest.c <<\EOF
-extern __thread int a __attribute__((tls_model ("initial-exec")));
-EOF
-if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&5'
- { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
- (eval $ac_try) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; }; then
- libc_cv_gcc_tls_model_attr=yes
-else
- libc_cv_gcc_tls_model_attr=no
-fi
-rm -f conftest*
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_tls_model_attr" >&5
-$as_echo "$libc_cv_gcc_tls_model_attr" >&6; }
-if test "$libc_cv_gcc_tls_model_attr" = no; then
- as_fn_error $? "support for the tls_model attribute is required" "$LINENO" 5
-fi
-
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler option to disable generation of FMA instructions" >&5
$as_echo_n "checking for compiler option to disable generation of FMA instructions... " >&6; }
if ${libc_cv_cc_nofma+:} false; then :
diff --git a/configure.ac b/configure.ac
index 4879c48..1be44f5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1564,36 +1564,6 @@ if test "$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