2003-03-10 Roland McGrath <roland@redhat.com>

	* configure.in: New check for -g on .S files.
	* configure: Regenerated.
	* config.make.in (have-cpp-asm-debuginfo): New variable.
	* config.h.in (HAVE_CPP_ASM_DEBUGINFO): New #undef.
	* Makeconfig (ASFLAGS): New variable, if undefined and
	$(have-cpp-asm-debuginfo), take options matching -g% from $(CFLAGS).
	* Makerules (compile.S, COMPILE.S): Use $(ASFLAGS).

6 files changed, 102 insertions, 6 deletions

diff --git a/Makeconfig b/Makeconfig
index 78852dc234..b2c81e1faa 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -716,6 +716,12 @@ CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
 libtype.oS = lib%_nonshared.a
 endif
 
+# The assembler can generate debug information too.
+ifndef ASFLAGS
+ifeq ($(have-cpp-asm-debuginfo),yes)
+ASFLAGS := $(filter -g%,$(CFLAGS))
+endif
+endif
 
 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
 
diff --git a/Makerules b/Makerules
index c4a28ae8bd..1b57e29553 100644
--- a/Makerules
+++ b/Makerules
@@ -396,8 +396,10 @@ endif
 
 # GCC can grok options after the file name, and it looks nicer that way.
 compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS)
-compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) $(ASFLAGS-$(suffix $@))
-COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) $(ASFLAGS-$(suffix $@))
+compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \
+		  $(ASFLAGS) $(ASFLAGS-$(suffix $@))
+COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \
+		  $(ASFLAGS) $(ASFLAGS-$(suffix $@))
 COMPILE.s = $(filter-out -pipe,$(CC)) -c $(ASFLAGS)
 
 # If we want to generate MD5 checksums for the sources do this now.
diff --git a/config.h.in b/config.h.in
index d00d33483b..29b809e8cf 100644
--- a/config.h.in
+++ b/config.h.in
@@ -58,6 +58,9 @@
 /* Define a symbol_name as a global .symbol_name for ld.  */
 #undef	HAVE_ASM_GLOBAL_DOT_NAME
 
+/* Define if the assembler generates debugging information directly.  */
+#undef	HAVE_CPP_ASM_DEBUGINFO
+
 /* Define if _Unwind_Find_FDE should be exported from glibc.  */
 #undef  EXPORT_UNWIND_FIND_FDE
 
diff --git a/config.make.in b/config.make.in
index ed0ad416a2..da6bb5cf4d 100644
--- a/config.make.in
+++ b/config.make.in
@@ -50,6 +50,7 @@ with-cvs = @with_cvs@
 old-glibc-headers = @old_glibc_headers@
 unwind-find-fde = @libc_cv_gcc_unwind_find_fde@
 have-initfini-array = @libc_cv_initfinit_array@
+have-cpp-asm-debuginfo = @libc_cv_cpp_asm_debuginfo@
 
 static-libgcc = @libc_cv_gcc_static_libgcc@
 
diff --git a/configure b/configure
index 0dfc3c6010..2fd3e54312 100755
--- a/configure
+++ b/configure
@@ -312,7 +312,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS with_fp with_cvs oldest_abi subdirs force_install all_warnings build build_cpu build_vendor build_os host host_cpu host_vendor host_os base_machine sysnames INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LN_S PWD_P CC MAKE MSGFMT MAKEINFO SED AUTOCONF CFLAGS LDFLAGS CPPFLAGS ac_ct_CC OBJEXT BUILD_CC cross_compiling CPP AR OBJDUMP RANLIB ac_ct_RANLIB MIG AS LD CCVERSION SYSINCLUDES libc_cv_gcc_static_libgcc BASH libc_cv_have_bash2 KSH libc_cv_have_ksh AWK PERL INSTALL_INFO OLD_DEBIAN_INSTALL_INFO BISON VERSIONING libc_cv_asm_protected_directive libc_cv_initfinit_array libc_cv_z_nodelete libc_cv_z_nodlopen libc_cv_z_initfirst libc_cv_Bgroup libc_cv_z_combreloc libc_cv_have_initfini no_whole_archive exceptions LIBGD EGREP sizeof_long_double libc_cv_gcc_unwind_find_fde uname_sysname uname_release uname_version old_glibc_headers libc_cv_slibdir libc_cv_localedir libc_cv_sysconfdir libc_cv_rootsbindir use_ldconfig ldd_rewrite_script gnu_ld gnu_as elf xcoff static shared pic_default profile omitfp bounded static_nss nopic_initfini DEFINES linux_doors mach_interface_list VERSION RELEASE LIBOBJS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS with_fp with_cvs oldest_abi subdirs force_install all_warnings build build_cpu build_vendor build_os host host_cpu host_vendor host_os base_machine sysnames INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LN_S PWD_P CC MAKE MSGFMT MAKEINFO SED AUTOCONF CFLAGS LDFLAGS CPPFLAGS ac_ct_CC OBJEXT BUILD_CC cross_compiling CPP AR OBJDUMP RANLIB ac_ct_RANLIB MIG AS LD CCVERSION SYSINCLUDES libc_cv_gcc_static_libgcc BASH libc_cv_have_bash2 KSH libc_cv_have_ksh AWK PERL INSTALL_INFO OLD_DEBIAN_INSTALL_INFO BISON VERSIONING libc_cv_asm_protected_directive libc_cv_initfinit_array libc_cv_z_nodelete libc_cv_z_nodlopen libc_cv_z_initfirst libc_cv_Bgroup libc_cv_z_combreloc libc_cv_have_initfini libc_cv_cpp_asm_debuginfo no_whole_archive exceptions LIBGD EGREP sizeof_long_double libc_cv_gcc_unwind_find_fde uname_sysname uname_release uname_version old_glibc_headers libc_cv_slibdir libc_cv_localedir libc_cv_sysconfdir libc_cv_rootsbindir use_ldconfig ldd_rewrite_script gnu_ld gnu_as elf xcoff static shared pic_default profile omitfp bounded static_nss nopic_initfini DEFINES linux_doors mach_interface_list VERSION RELEASE LIBOBJS LTLIBOBJS'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -5272,6 +5272,57 @@ _ACEOF
   ;;
 esac
 
+echo "$as_me:$LINENO: checking if -g produces usable source locations for assembler-with-cpp" >&5
+echo $ECHO_N "checking if -g produces usable source locations for assembler-with-cpp... $ECHO_C" >&6
+if test "${libc_cv_cpp_asm_debuginfo+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat > conftest.S <<EOF
+#include "confdefs.h"
+
+/* comment on
+   two lines */
+	${libc_cv_dot_text}
+	${libc_cv_asm_global_directive} foo
+foo:
+	/* Unfortunately this test only works for a real instruction,
+	   not for any of the machine-independent pseudo-ops.
+	   So we just have to assume everybody has a "nop".  */
+	nop
+	/* comment */
+	nop
+	/* comment */
+	nop
+EOF
+if { ac_try='${CC-cc} $CFLAGS -g -c conftest.S 1>&5'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+   ac_pattern='conftest\.S'
+   { ac_try='readelf --debug-dump=line conftest.o |
+		   grep $ac_pattern 1>&5'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  libc_cv_cpp_asm_debuginfo=yes
+else
+  libc_cv_cpp_asm_debuginfo=no
+fi
+rm -f conftest*
+fi
+echo "$as_me:$LINENO: result: $libc_cv_cpp_asm_debuginfo" >&5
+echo "${ECHO_T}$libc_cv_cpp_asm_debuginfo" >&6
+if test $libc_cv_cpp_asm_debuginfo = yes; then
+  cat >>confdefs.h <<\_ACEOF
+#define HAVE_CPP_ASM_DEBUGINFO 1
+_ACEOF
+
+fi
+
 echo "$as_me:$LINENO: checking for ld --no-whole-archive" >&5
 echo $ECHO_N "checking for ld --no-whole-archive... $ECHO_C" >&6
 if test "${libc_cv_ld_no_whole_archive+set}" = set; then
@@ -5393,7 +5444,7 @@ if test "${libc_cv_gcc_dwarf2_unwind_info+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat > conftest.c <<EOF
-#line 5396 "configure"
+#line 5447 "configure"
 static char *__EH_FRAME_BEGIN__;
 _start ()
 {
@@ -5493,7 +5544,7 @@ if test "${libc_cv_gcc_builtin_expect+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat > conftest.c <<EOF
-#line 5496 "configure"
+#line 5547 "configure"
 int foo (int a)
 {
   a = __builtin_expect (a, 10);
@@ -5561,7 +5612,7 @@ if test "${libc_cv_gcc_subtract_local_labels+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat > conftest.c <<EOF
-#line 5564 "configure"
+#line 5615 "configure"
 int foo (int a)
 {
   static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
@@ -7237,6 +7288,7 @@ s,@libc_cv_z_initfirst@,$libc_cv_z_initfirst,;t t
 s,@libc_cv_Bgroup@,$libc_cv_Bgroup,;t t
 s,@libc_cv_z_combreloc@,$libc_cv_z_combreloc,;t t
 s,@libc_cv_have_initfini@,$libc_cv_have_initfini,;t t
+s,@libc_cv_cpp_asm_debuginfo@,$libc_cv_cpp_asm_debuginfo,;t t
 s,@no_whole_archive@,$no_whole_archive,;t t
 s,@exceptions@,$exceptions,;t t
 s,@LIBGD@,$LIBGD,;t t
diff --git a/configure.in b/configure.in
index 3ba21bcce6..a9903146d0 100644
--- a/configure.in
+++ b/configure.in
@@ -1462,6 +1462,38 @@ EOF
   ;;
 esac
 
+AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
+	       libc_cv_cpp_asm_debuginfo, [dnl
+cat > conftest.S <<EOF
+#include "confdefs.h"
+
+/* comment on
+   two lines */
+	${libc_cv_dot_text}
+	${libc_cv_asm_global_directive} foo
+foo:
+	/* Unfortunately this test only works for a real instruction,
+	   not for any of the machine-independent pseudo-ops.
+	   So we just have to assume everybody has a "nop".  */
+	nop
+	/* comment */
+	nop
+	/* comment */
+	nop
+EOF
+if AC_TRY_COMMAND([${CC-cc} $CFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) &&
+   ac_pattern='conftest\.S'
+   AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
+		   grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]); then
+  libc_cv_cpp_asm_debuginfo=yes
+else
+  libc_cv_cpp_asm_debuginfo=no
+fi
+rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
+if test $libc_cv_cpp_asm_debuginfo = yes; then
+  AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
+fi
+
 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
 cat > conftest.c <<\EOF
 _start () {}