Add a flag to control the balance between GNAT encodings and std. DWARF

In order to accomodate the debugger's support evolution for "new" DWARF
constructs, we need to have an flag that controls the amount of GNAT
encodings/standard DWARF information that is emitted in the debug info.
Propagate this new parameter into the Ada front-end.

gcc/ChangeLog:

	* common.opt (gnat_encodings): New variable
	(dwarf_gnat_encodings): New enum type.
	(fgnat_encodings): New option.
	* flag-types.h (enum dwarf_gnat_encodings): New.

gcc/ada/ChangeLog:

	* gcc-interface/misc.c (gnat_encodings): Undefine macro and
	declare a global variable.
	(gnat_post_options): Initialize this global from options.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231761 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 3 insertions, 1 deletions

diff --git a/gcc/ada/gcc-interface/misc.c b/gcc/ada/gcc-interface/misc.c
index 2a6514278653..ef0fe3f0daf7 100644
--- a/gcc/ada/gcc-interface/misc.c
+++ b/gcc/ada/gcc-interface/misc.c
@@ -68,7 +68,8 @@ extern const char **gnat_argv;
 
 /* Ada code requires variables for these settings rather than elements
    of the global_options structure because they are imported.  */
-int gnat_encodings = 0;
+#undef gnat_encodings
+enum dwarf_gnat_encodings gnat_encodings = DWARF_GNAT_ENCODINGS_DEFAULT;
 
 #undef optimize
 int optimize;
@@ -276,6 +277,7 @@ gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
 		"supported anymore");
 
   /* Copy global settings to local versions.  */
+  gnat_encodings = global_options.x_gnat_encodings;
   optimize = global_options.x_optimize;
   optimize_size = global_options.x_optimize_size;
   flag_compare_debug = global_options.x_flag_compare_debug;