Actually fully support "gnu" alias for "gas" parser. A number of places

do a check against the parser name.

Reported by: rugxulo@gmail.com

svn path=/trunk/yasm/; revision=1749

frontends/yasm/yasm.c

@@ -474,7 +474,8 @@ do_assemble(FILE *in)
 
     /* Check for undefined symbols */
     yasm_symtab_parser_finalize(yasm_object_get_symtab(object),
-				strcmp(cur_parser_module->keyword, "gas")==0,
+				strcmp(cur_parser_module->keyword, "gas")==0 ||
+				strcmp(cur_parser_module->keyword, "gnu")==0,
 				cur_objfmt, errwarns);
     check_errors(errwarns, object);
 

modules/arch/x86/x86arch.c

@@ -65,7 +65,8 @@ x86_create(const char *machine, const char *parser,
 
     if (yasm__strcasecmp(parser, "nasm") == 0)
 	arch_x86->parser = X86_PARSER_NASM;
-    else if (yasm__strcasecmp(parser, "gas") == 0)
+    else if (yasm__strcasecmp(parser, "gas") == 0
+	     || yasm__strcasecmp(parser, "gnu") == 0)
 	arch_x86->parser = X86_PARSER_GAS;
     else {
 	yasm_xfree(arch_x86);