* Makefile.in (c-cppbuiltin.o): Depend on debug.h.

        * c-cppbuiltin.c (c_cpp_builtins): Define __GCC_HAVE_DWARF2_CFI_ASM.
        * doc/cpp.texi (__GCC_HAVE_DWARF2_CFI_ASM): Document it.
        * common.opt (fdwarf2-cfi-asm): New.
        * configure.ac (HAVE_GAS_CFI_DIRECTIVE): New.
        * config.in, configure: Rebuild.
        * dwarf2asm.c (dw2_asm_output_data_raw): New.
        (dw2_asm_output_data_uleb128_raw, dw2_asm_output_data_sleb128_raw): New.
        (dw2_force_const_mem): Externalize.
        * dwarf2asm.h: Update.
        * dwarf2out.c (dwarf2out_cfi_label): If flag_dwarf2_cfi_asm, don't
        generate a real label.
        (output_cfi_directive): New.
        (add_fde_cfi): If flag_dwarf2_cfi_asm, use it.
        (output_call_frame_info): Do nothing if flag_dwarf2_cfi_asm.
        (dwarf2out_begin_prologue): Emit .cfi_startproc, .cfi_personality,
        and .cfi_lsda.
        (dwarf2out_end_epilogue): Emit .cfi_endproc.
        (output_loc_operands_raw, output_loc_sequence_raw): New.
        (output_cfa_loc_raw): New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@138733 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 44 insertions, 0 deletions

diff --git a/gcc/configure b/gcc/configure
index a79664b708e..d1996bb7b4b 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -20832,6 +20832,50 @@ _ACEOF
 
 fi
 
+# Check if we have assembler support for unwind directives.
+echo "$as_me:$LINENO: checking assembler for cfi directives" >&5
+echo $ECHO_N "checking assembler for cfi directives... $ECHO_C" >&6
+if test "${gcc_cv_as_cfi_directive+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  gcc_cv_as_cfi_directive=no
+    if test $in_tree_gas = yes; then
+    if test $in_tree_gas_is_elf = yes \
+  && test $gcc_cv_gas_vers -ge `expr \( \( 2 \* 1000 \) + 17 \) \* 1000 + 0`
+  then gcc_cv_as_cfi_directive=yes
+fi
+  elif test x$gcc_cv_as != x; then
+    echo '	.text
+	.cfi_startproc
+	.cfi_offset 0, 0
+	.cfi_same_value 1
+	.cfi_def_cfa 1, 2
+	.cfi_escape 1, 2, 3, 4, 5
+	.cfi_endproc' > conftest.s
+    if { ac_try='$gcc_cv_as  -o conftest.o conftest.s >&5'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }
+    then
+	gcc_cv_as_cfi_directive=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+echo "$as_me:$LINENO: result: $gcc_cv_as_cfi_directive" >&5
+echo "${ECHO_T}$gcc_cv_as_cfi_directive" >&6
+
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_GAS_CFI_DIRECTIVE `if test $gcc_cv_as_cfi_directive = yes; then echo 1; else echo 0; fi`
+_ACEOF
+
+
 # GAS versions up to and including 2.11.0 may mis-optimize
 # .eh_frame data.
 echo "$as_me:$LINENO: checking assembler for eh_frame optimization" >&5