gcc.c (version_compare_spec_function): Use fatal() rather than abort().

	* gcc.c (version_compare_spec_function): Use fatal() rather than
	abort().

	* config/rs6000/darwin.h (DARWIN_CRT2_SPEC): New.
	(SUBTARGET_EXTRA_SPECS): Define %(darwin_crt2).
	* config/i386/darwin.h (SUBTARGET_EXTRA_SPECS): Define %(darwin_crt2)
	as empty.
	* config/darwin.h (STARTFILE_SPEC): Use %(darwin_crt2) to possibly
	link in crt2.o.
	
	* config/darwin.h (REAL_LIBGCC_SPEC): Link in shared libgcc depending
	on -mmacosx-version-min setting.

From-SVN: r106935

gcc/ChangeLog

+2005-11-14  Geoffrey Keating  <geoffk@apple.com>
+
+	* gcc.c (version_compare_spec_function): Use fatal() rather than
+	abort().
+
+	* config/rs6000/darwin.h (DARWIN_CRT2_SPEC): New.
+	(SUBTARGET_EXTRA_SPECS): Define %(darwin_crt2).
+	* config/i386/darwin.h (SUBTARGET_EXTRA_SPECS): Define %(darwin_crt2)
+	as empty.
+	* config/darwin.h (STARTFILE_SPEC): Use %(darwin_crt2) to possibly
+	link in crt2.o.
+	
+	* config/darwin.h (REAL_LIBGCC_SPEC): Link in shared libgcc depending
+	on -mmacosx-version-min setting.
+
 2005-11-14  Diego Novillo  <dnovillo@redhat.com>
 
 	PR 24840

gcc/config/darwin.h

@@ -302,23 +302,31 @@ Boston, MA 02110-1301, USA.  */
 
 #define LIB_SPEC "%{!static:-lSystem}"
 
-/* -dynamiclib implies -shared-libgcc just like -shared would on linux.  
-   Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
-   libraries to link against.  */
+/* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
+   libraries to link against, and by not linking against libgcc_s on
+   earlier-than-10.3.9.
+
+   Note that by default, -lgcc_eh is not linked against!  This is
+   because in a future version of Darwin the EH frame information may
+   be in a new format, or the fallback routine might be changed; if
+   you want to explicitly link against the static version of those
+   routines, because you know you don't need to unwind through system
+   libraries, you need to explicitly say -static-libgcc.  
+   
+   If it is linked against, it has to be before -lgcc, because it may
+   need symbols from -lgcc.  */
 #undef REAL_LIBGCC_SPEC
-#define REAL_LIBGCC_SPEC						\
-   "%{static|static-libgcc:-lgcc -lgcc_eh;				\
-      :%{shared-libgcc|Zdynamiclib					\
-         :%:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)	\
-          %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)	\
-          -lgcc;							\
-         :-lgcc -lgcc_eh}}"
-
+#define REAL_LIBGCC_SPEC						   \
+   "%{static-libgcc|static: -lgcc_eh -lgcc;				   \
+      shared-libgcc|fexceptions:					   \
+       %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)	   \
+       %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)	   \
+       -lgcc;								   \
+      :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
+       %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)	   \
+       -lgcc}"
+			 
 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
-/* We don't want anything to do with crt2.o in the 64-bit case;
-   testing the PowerPC-specific -m64 flag here is a little irregular,
-   but it's overkill to make copies of this spec for each target
-   arch.  */
 
 #undef  STARTFILE_SPEC
 #define STARTFILE_SPEC  \
@@ -326,11 +334,11 @@ Boston, MA 02110-1301, USA.  */
      %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
                      %{!static:%{object:-lgcrt0.o} \
                                %{!object:%{preload:-lgcrt0.o} \
-                                 %{!preload:-lgcrt1.o %{!m64: crt2.o%s}}}}} \
+                                 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
                 %{!pg:%{static:-lcrt0.o} \
                       %{!static:%{object:-lcrt0.o} \
                                 %{!object:%{preload:-lcrt0.o} \
-                                  %{!preload:-lcrt1.o %{!m64: crt2.o%s}}}}}}}"
+                                  %{!preload:-lcrt1.o %(darwin_crt2)}}}}}}"
 
 /* The native Darwin linker doesn't necessarily place files in the order
    that they're specified on the link line.  Thus, it is pointless

gcc/config/i386/darwin.h

@@ -50,6 +50,7 @@ Boston, MA 02110-1301, USA.  */
 #undef SUBTARGET_EXTRA_SPECS
 #define SUBTARGET_EXTRA_SPECS					\
   { "darwin_arch", "i386" },					\
+  { "darwin_crt2", "" },					\
   { "darwin_subarch", "i386" },
 
 /* Use the following macro for any Darwin/x86-specific command-line option

gcc/config/rs6000/darwin.h

@@ -124,9 +124,14 @@ do {									\
    mcpu=G5:ppc970;				\
    :ppc}}"
 
+/* crt2.o is at least partially required for 10.3.x and earlier.  */
+#define DARWIN_CRT2_SPEC \
+  "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
+
 #undef SUBTARGET_EXTRA_SPECS
 #define SUBTARGET_EXTRA_SPECS			\
   { "darwin_arch", "%{m64:ppc64;:ppc}" },	\
+  { "darwin_crt2", DARWIN_CRT2_SPEC },		\
   { "darwin_subarch", DARWIN_SUBARCH_SPEC },
 
 /* Output a .machine directive.  */

gcc/gcc.c

@@ -7699,13 +7699,13 @@ version_compare_spec_function (int argc, const char **argv)
   bool result;
 
   if (argc < 3)
-    abort ();
+    fatal ("too few arguments to %%:version-compare");
   if (argv[0][0] == '\0')
     abort ();
   if ((argv[0][1] == '<' || argv[0][1] == '>') && argv[0][0] != '!')
     nargs = 2;
   if (argc != nargs + 3)
-    abort ();
+    fatal ("too many arguments to %%:version-compare");
 
   switch_len = strlen (argv[nargs + 1]);
   for (i = 0; i < n_switches; i++)
@@ -7746,7 +7746,7 @@ version_compare_spec_function (int argc, const char **argv)
       break;
 
     default:
-      abort ();
+      fatal ("unknown operator %qs in %%:version-compare", argv[0]);
     }
   if (! result)
     return NULL;