invoke.texi (Debugging Options): Document -g0.

	* doc/invoke.texi (Debugging Options): Document -g0.
	* config/darwin.h (LINK_COMMAND_SPEC): Replace -gnone with -g0.
	* config/darwin9.h (LINK_COMMAND_SPEC): Likewise.

From-SVN: r120013

gcc/ChangeLog

+2006-12-18  Geoffrey Keating  <geoffk@apple.com>
+
+	* doc/invoke.texi (Debugging Options): Document -g0.
+	* config/darwin.h (LINK_COMMAND_SPEC): Replace -gnone with -g0.
+	* config/darwin9.h (LINK_COMMAND_SPEC): Likewise.
+
 2006-12-18  Ian Lance Taylor  <iant@google.com>
 
 	* c.opt (Wmissing-declarations): Add C++ and ObjC++.

gcc/config/darwin.h

@@ -240,7 +240,7 @@ extern GTY(()) int darwin_ms_struct;
     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
     %{.c|.cc|.C|.cpp|.c++|.CPP|.m|.mm: \
-    %{gdwarf-2:%{!gstabs*:%{!gnone: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
+    %{gdwarf-2:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
 
 #ifdef TARGET_SYSTEM_ROOT
 #define LINK_SYSROOT_SPEC \

gcc/config/darwin9.h

@@ -16,4 +16,4 @@
     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
     %{.c|.cc|.C|.cpp|.c++|.CPP|.m|.mm: \
-    %{g*:%{!gstabs*:%{!gnone: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
+    %{g*:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"

gcc/doc/invoke.texi

@@ -3664,6 +3664,9 @@ supported).  This is the format used by DEBUG on VMS systems.
 Request debugging information and also use @var{level} to specify how
 much information.  The default level is 2.
 
+Level 0 produces no debug information at all.  Thus, @option{-g0} negates
+@option{-g}.
+
 Level 1 produces minimal information, enough for making backtraces in
 parts of the program that you don't plan to debug.  This includes
 descriptions of functions and external variables, but no information