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authorUlrich Drepper <drepper@redhat.com>2009-07-09 23:52:22 -0700
committerUlrich Drepper <drepper@redhat.com>2009-07-09 23:52:22 -0700
commit415ac3df9b10ae426d4f71f9d48003f6a3c7bd8d (patch)
treeffdd1aed425688539db80ff7b9daf6f6ddbcbfff /configure
parentb4f55afd031f14531ba7681032fc5f75a1578320 (diff)
downloadglibc-415ac3df9b10ae426d4f71f9d48003f6a3c7bd8d.tar.gz
Implement STB_GNU_UNIQUE handling.
Some symbols have to be identified process-wide by their name. This is particularly important for some C++ features (e.g., class local static data and static variables in inline functions). This cannot completely be implemented with ELF functionality so far. The STB_GNU_UNIQUE binding helps by ensuring the dynamic linker will always use the same definition for all symbols with the same name and this binding.
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure26
1 files changed, 26 insertions, 0 deletions
diff --git a/configure b/configure
index e30778fd94..4e49f7068b 100755
--- a/configure
+++ b/configure
@@ -5994,6 +5994,32 @@ _ACEOF
fi
+{ $as_echo "$as_me:$LINENO: checking for assembler gnu_unique_object symbol type" >&5
+$as_echo_n "checking for assembler gnu_unique_object symbol type... " >&6; }
+if test "${libc_cv_asm_unique_object+set}" = set; then
+ $as_echo_n "(cached) " >&6
+else
+ cat > conftest.s <<EOF
+${libc_cv_dot_text}
+_sym:
+.type _sym, ${libc_cv_asm_type_prefix}gnu_unique_object
+EOF
+if ${CC-cc} -c $ASFLAGS conftest.s 1>&5 2>&5; then
+ libc_cv_asm_unique_object=yes
+else
+ libc_cv_asm_unique_object=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:$LINENO: result: $libc_cv_asm_unique_object" >&5
+$as_echo "$libc_cv_asm_unique_object" >&6; }
+if test $libc_cv_asm_unique_object = yes; then
+ cat >>confdefs.h <<\_ACEOF
+#define HAVE_ASM_UNIQUE_OBJECT 1
+_ACEOF
+
+fi
+
# For the multi-arch option we need support in the assembler.
if test "$multi_arch" = yes; then
if test "x$libc_cv_asm_type_prefix" != xno; then