GNU C Library master sources branch master updated. glibc-2.22-464-g7a4cb4a

jsm28@sourceware.org jsm28@sourceware.org
Tue Oct 27 10:48:00 GMT 2015


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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=7a4cb4ad1130e43e1256f85cea38a3227320f944

commit 7a4cb4ad1130e43e1256f85cea38a3227320f944
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue Oct 27 10:48:05 2015 +0000

    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.

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

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog    |    4 ++++
 configure    |   52 ----------------------------------------------------
 configure.ac |   30 ------------------------------
 3 files changed, 4 insertions(+), 82 deletions(-)


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