gcc/gcc.c |   72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

Index: gcc41/gcc/gcc.c
===================================================================
--- gcc41.orig/gcc/gcc.c
+++ gcc41/gcc/gcc.c
@@ -334,6 +334,7 @@ static void display_help (void);
 static void add_preprocessor_option (const char *, int);
 static void add_assembler_option (const char *, int);
 static void add_linker_option (const char *, int);
+static void hijack_cflags (int *, const char ***);
 static void process_command (int, const char **);
 static int execute (void);
 static void alloc_args (void);
@@ -3143,6 +3144,76 @@ add_linker_option (const char *option, i
   linker_options [n_linker_options - 1] = save_string (option, len);
 }
 
+static const char **
+split_string (char *s, const char **vp, int *k, int sz)
+{
+  int j = 0;
+  while (s [j])
+    {
+      vp [*k] = &s [j];
+      while (s [j] && s [j] != ' ')
+	j ++;
+      if (s [j])
+	{
+	  s [j] = '\0';
+	  j ++;
+	  while (s [j] && s [j] == ' ')
+		j ++;
+	}
+      (*k) ++;
+      if ((*k) >= sz)
+	{
+	  sz += sz;
+	  vp = xrealloc (vp, sz * sizeof (char *));
+	}
+    }
+  vp [*k] = 0;
+  return vp;
+}
+
+static void
+hijack_cflags (int *argcp, const char ***argvp)
+{
+  char *s, *t, **sp;
+  const char **vp;
+  int ssz, vsz, nsp, nvp, j, q, skip;
+
+  s = getenv ("GCC_HIDDEN_CFLAGS");
+  t = getenv ("GCC_STRIP_CFLAGS");
+  if (s && s [0])
+    {
+      ssz = 4;
+      sp = xcalloc (ssz, sizeof (char *));
+      nsp = 0;
+      if (t && t [0])
+	sp = (char **) split_string (t, (const char **) sp, &nsp, ssz);
+      else
+	sp [0] = 0;
+      vsz = *argcp + 4;
+      vp = xcalloc (vsz, sizeof (char *));
+      nvp = q = 0;
+      skip = 0;
+      while (q < *argcp)
+	{
+	  for (j = 0; j < nsp; j ++)
+	    {
+	      if (!strcmp ((*argvp) [q], sp [j]))
+		skip = 1;
+	    }
+	  if (!skip)
+	    {
+	      vp [nvp] = (*argvp) [q];
+	      nvp ++;
+	    }
+	  skip = 0;
+	  q ++;
+	}
+      vp = split_string (s, vp, &nvp, vsz);
+      *argcp = nvp;
+      *argvp = vp;
+    }
+}
+
 /* Create the vector `switches' and its contents.
    Store its length in `n_switches'.  */
 
@@ -6125,6 +6196,7 @@ main (int argc, const char **argv)
      Make a table of specified input files (infiles, n_infiles).
      Decode switches that are handled locally.  */
 
+  hijack_cflags (&argc, &argv);
   process_command (argc, argv);
 
   /* Initialize the vector of specs to just the default.