2010-04-14 Manuel López-Ibáñez <manu@gcc.gnu.org>

[pf3gnuchains/gcc-fork.git] / gcc / configure.ac

diff --git a/gcc/configure.ac b/gcc/configure.ac
index aa0fa4c..a6a148b 100644 (file)
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -3276,7 +3276,7 @@ foo:      nop
       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
         [Define if your assembler supports the subtraction of symbols in different sections.])])
 
-    # This one is used unconditionally by i386.[ch]; it is to be defined
+    # These two are used unconditionally by i386.[ch]; it is to be defined
     # to 1 if the feature is present, 0 otherwise.
     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
@@ -3288,6 +3288,15 @@ foo:     nop
     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
       [Define true if the assembler supports '.long foo@GOTOFF'.])
+
+    gcc_GAS_CHECK_FEATURE([rep and lock prefix],
+        gcc_cv_as_ix86_rep_lock_prefix,,,
+       [rep movsl
+        lock orl $0, (%esp)])
+    AC_DEFINE_UNQUOTED(HAVE_AS_IX86_REP_LOCK_PREFIX,
+      [`if test $gcc_cv_as_ix86_rep_lock_prefix = yes; then echo 1; else echo 0; fi`],
+      [Define true if the assembler supports 'rep <insn>, lock <insn>'.])
+
     ;;
 
   ia64*-*-*)
@@ -3839,7 +3848,8 @@ EOF
     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
         | grep "gc-sections option ignored" > /dev/null; then
       gcc_cv_ld_eh_gc_sections=no
-    elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+    elif $gcc_cv_objdump -h conftest 2> /dev/null \
+         | grep gcc_except_table > /dev/null; then
       gcc_cv_ld_eh_gc_sections=yes
       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
       if test x$gcc_cv_as_comdat_group != xyes; then
@@ -3866,7 +3876,8 @@ EOF
          if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
               | grep "gc-sections option ignored" > /dev/null; then
            gcc_cv_ld_eh_gc_sections=no
-         elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
+         elif $gcc_cv_objdump -h conftest 2> /dev/null \
+              | grep gcc_except_table > /dev/null; then
            gcc_cv_ld_eh_gc_sections=yes
          fi
        fi
@@ -4506,7 +4517,7 @@ if test x"$enable_plugin" = x"yes"; then
   else
     AC_MSG_CHECKING([for -rdynamic])
     ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
-    if $export_sym_check conftest | grep foobar > /dev/null; then
+    if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
       plugin_rdynamic=yes
       pluginlibs="-rdynamic"
     else