Remove configure test for ARM TLS descriptors support.

GCC 4.7 added support for ARM TLS descriptors.  The binutils support
is present in binutils 2.22.  Thus, this patch removes the associated
configure test as obsolete (leaving Makefile conditionals, as NaCl
sets have-arm-tls-desc = no in its sysdeps fragment).

Tested for ARM that installed shared libraries are unchanged by the
patch.

	* sysdeps/arm/configure.ac (libc_cv_arm_tls_desc): Remove
	configure test.
	* sysdeps/arm/configure: Regenerated.
	* sysdeps/arm/Makefile [!have-arm-tls-desc] (have-arm-tls-desc):
	Define variable if not already defined.

diff --git a/ChangeLog b/ChangeLog
index a9a4ad088ad54a0f77d96623ab81bc48051b015c..362b0aaea0aded8c3de10429eafb1cd0177853a1 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2015-10-27  Joseph Myers  <joseph@codesourcery.com>
 
+       * sysdeps/arm/configure.ac (libc_cv_arm_tls_desc): Remove
+       configure test.
+       * sysdeps/arm/configure: Regenerated.
+       * sysdeps/arm/Makefile [!have-arm-tls-desc] (have-arm-tls-desc):
+       Define variable if not already defined.
+
        [BZ #17404]
        * sysdeps/mips/atomic-machine.h
        [__GNUC_PREREQ (4, 8) || (__mips16 && __GNUC_PREREQ (4, 7))]:

diff --git a/sysdeps/arm/Makefile b/sysdeps/arm/Makefile
index 17c129b2e15c6150886acc17c9e7b38ec0133f8d..2849aeda4238997975c5a8096da474e54da26932 100644 (file)
--- a/sysdeps/arm/Makefile
+++ b/sysdeps/arm/Makefile
@@ -1,6 +1,11 @@
 gnulib-arch = $(elf-objpfx)libgcc-stubs.a
 static-gnulib-arch = $(elf-objpfx)libgcc-stubs.a
 
+# All supported build tools support TLS descriptors, but the OS may not.
+ifndef have-arm-tls-desc
+have-arm-tls-desc = yes
+endif
+
 ifeq ($(subdir),elf)
 sysdep-dl-routines += tlsdesc dl-tlsdesc
 sysdep_routines += aeabi_unwind_cpp_pr1 find_exidx

diff --git a/sysdeps/arm/configure b/sysdeps/arm/configure
index 87ec430da159dd34bb1e4ff87b34f9f0da24c581..431e843b2b51694b84b14257b8a339b262840a64 100644 (file)
--- a/sysdeps/arm/configure
+++ b/sysdeps/arm/configure
@@ -176,42 +176,6 @@ else
 default-abi = soft"
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the build tools support the GNU descriptor TLS scheme" >&5
-$as_echo_n "checking whether the build tools support the GNU descriptor TLS scheme... " >&6; }
-if ${libc_cv_arm_tls_desc+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  old_CFLAGS="$CFLAGS"
-  CFLAGS="$CFLAGS -mtls-dialect=gnu2"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-asm (".word\tfoo(tlsdesc)");
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  libc_cv_arm_tls_desc=yes
-else
-  libc_cv_arm_tls_desc=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$old_CFLAGS"
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_tls_desc" >&5
-$as_echo "$libc_cv_arm_tls_desc" >&6; }
-if test $libc_cv_arm_tls_desc = yes; then
-  config_vars="$config_vars
-have-arm-tls-desc = yes"
-else
-  config_vars="$config_vars
-have-arm-tls-desc = no"
-fi
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether PC-relative relocs in movw/movt work properly" >&5
 $as_echo_n "checking whether PC-relative relocs in movw/movt work properly... " >&6; }
 if ${libc_cv_arm_pcrel_movw+:} false; then :

diff --git a/sysdeps/arm/configure.ac b/sysdeps/arm/configure.ac
index a9b114e3b9349424b78bea11eab04f902e83df87..90cdd69c7571e012a65b43775e4e3f6b2f8f15cc 100644 (file)
--- a/sysdeps/arm/configure.ac
+++ b/sysdeps/arm/configure.ac
@@ -26,19 +26,6 @@ else
   LIBC_CONFIG_VAR([default-abi], [soft])
 fi
 
-AC_CACHE_CHECK([whether the build tools support the GNU descriptor TLS scheme],
-  [libc_cv_arm_tls_desc],
-  [old_CFLAGS="$CFLAGS"
-  CFLAGS="$CFLAGS -mtls-dialect=gnu2"
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([asm (".word\tfoo(tlsdesc)");], [])],
-    [libc_cv_arm_tls_desc=yes], [libc_cv_arm_tls_desc=no])
-  CFLAGS="$old_CFLAGS"])
-if test $libc_cv_arm_tls_desc = yes; then
-  LIBC_CONFIG_VAR([have-arm-tls-desc], [yes])
-else
-  LIBC_CONFIG_VAR([have-arm-tls-desc], [no])
-fi
-
 AC_CACHE_CHECK([whether PC-relative relocs in movw/movt work properly],
               libc_cv_arm_pcrel_movw, [
 cat > conftest.s <<\EOF