gcc.c (modify_target): New variable and struct.

	* gcc.c (modify_target): New variable and struct.
	(process_command): Handle MODIFY_TARGET_NAME.
	* tm.texi (MODIFY_TARGET_NAME): Add documentation for new macro.
	* config/pa/pa.h (MODIFY_TARGET_NAME): New macro.

From-SVN: r36555

1 files changed, 71 insertions, 0 deletions

diff --git a/gcc/gcc.c b/gcc/gcc.c
index 95cea0b..9884ff7 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -164,6 +164,21 @@ static const char *cross_compile = "1";
 static const char *cross_compile = "0";
 #endif
 
+#ifdef MODIFY_TARGET_NAME
+
+/* Information on how to alter the target name based on a command-line
+   switch.  The only case we support now is simply appending or deleting a
+   string to or from the end of the first part of the configuration name.  */
+
+struct modify_target
+{
+  const char *sw;
+  enum add_del {ADD, DELETE} add_del;
+  const char *str;
+}
+modify_target[] = MODIFY_TARGET_NAME;
+#endif
+ 
 /* The number of errors that have occurred; the link phase will not be
    run if this is non-zero.  */
 static int error_count = 0;
@@ -2832,6 +2847,7 @@ process_command (argc, argv)
      const char *const *argv;
 {
   register int i;
+  unsigned int j;
   const char *temp;
   char *temp1;
   const char *spec_lang = 0;
@@ -2839,6 +2855,9 @@ process_command (argc, argv)
   int have_c = 0;
   int have_o = 0;
   int lang_n_infiles = 0;
+#ifdef MODIFY_TARGET_NAME
+  int is_modify_target_name;
+#endif
 
   GET_ENV_PATH_LIST (gcc_exec_prefix, "GCC_EXEC_PREFIX");
 
@@ -3005,6 +3024,7 @@ process_command (argc, argv)
 
   /* Scan argv twice.  Here, the first time, just count how many switches
      there will be in their vector, and how many input files in theirs.
+     Also parse any switches that determine the configuration name, such as -b.
      Here we also parse the switches that cc itself uses (e.g. -v).  */
 
   for (i = 1; i < argc; i++)
@@ -3316,6 +3336,46 @@ process_command (argc, argv)
 
 	    default:
 	    normal_switch:
+
+#ifdef MODIFY_TARGET_NAME
+	      is_modify_target_name = 0;
+
+	      for (j = 0;
+		   j < sizeof modify_target / sizeof modify_target[0]; j++)
+		if (! strcmp (argv[i], modify_target[j].sw))
+		  {
+		    char *new_name
+		      = (char *) xmalloc (strlen (modify_target[j].str)
+					  + strlen (spec_machine));
+		    const char *p, *r;
+		    char *q;
+		    int made_addition = 0;
+
+		    is_modify_target_name = 1;
+		    for (p = spec_machine, q = new_name; *p != 0; )
+		      {
+			if (modify_target[j].add_del == DELETE
+			    && (! strncmp (q, modify_target[j].str,
+					   strlen (modify_target[j].str))))
+			  p += strlen (modify_target[j].str);
+			else if (modify_target[j].add_del == ADD
+				 && ! made_addition && *p == '-')
+			  {
+			    for (r = modify_target[j].str; *r != 0; )
+			      *q++ = *r++;
+			    made_addition = 1;
+			  }
+
+			*q++ = *p++;
+		      }
+
+		    spec_machine = new_name;
+		  }
+
+	      if (is_modify_target_name)
+		break;
+#endif		      
+
 	      n_switches++;
 
 	      if (SWITCH_TAKES_ARG (c) > (p[1] != 0))
@@ -3413,6 +3473,17 @@ process_command (argc, argv)
   for (i = 1; i < argc; i++)
     {
       /* Just skip the switches that were handled by the preceding loop.  */
+#ifdef MODIFY_TARGET_NAME
+      is_modify_target_name = 0;
+
+      for (j = 0; j < sizeof modify_target / sizeof modify_target[0]; j++)
+	if (! strcmp (argv[i], modify_target[j].sw))
+	  is_modify_target_name = 1;
+
+      if (is_modify_target_name)
+	;
+      else
+#endif
       if (! strncmp (argv[i], "-Wa,", 4))
 	;
       else if (! strncmp (argv[i], "-Wp,", 4))