dummy-checksum.c: New.

2005-05-18  Geoffrey Keating  <geoffk@apple.com>

	* dummy-checksum.c: New.
	* genchecksum.c: New.
	* c.opt (print_pch_checksum): New flag.
	* c-pch.c (struct c_pch_validity): Make much shorter.
	(no_checksum): New.
	(host_machine): Remove.
	(target_machine): Remove.
	(get_ident): Change PCH version number.
	(pch_init): When -fverbose-asm, print out the compiler fingerprint.
	Don't put triplets or version string in PCH validity data.
	Do put the compiler checksum in the validity data.
	(c_common_valid_pch): Don't check triplets or version string.  Do
	check checksum.
	(c_common_print_pch_checksum): New.
	* c-opts.c (c_common_handle_option): Add OPT_print_pch_checksum.
	Print fingerprint with -v.
	* c-common.h (c_common_print_pch_checksum): New.
	(executable_checksum): New.
	* Makefile.in (STAGEMOVESTUFF): Add cc1*-dummy, *-checksum.c.
	(cc1-dummy): New rule.
	(cc1-checksum.c): New rule.
	(cc1-checksum.o): New rule.
	(cc1): Add checksum support.
	(build/genchecksum): New.
	(build/genchecksum.o): New.
	(dummy-checksum.o): New.
	(genobjnames): Add genchecksum.o.
	(mostlyclean): Remove *-checksum.c.
	(gnucompare): Add libgcc to list of directories checked.
	Make comparison problems in libgcc/ and with checksum files only
	be warnings.
	* doc/invoke.texi (Precompiled Headers): Remove caution.
	Document that it must be the exact same binary.  Add a few
	known-safe flags to the list.

In cp/:
2005-05-18  Geoffrey Keating  <geoffk@apple.com>

	* Make-lang.in (cc1plus-dummy): New.
	(cc1plus-checksum.c): New.
	(cc1plus-checksum.o): New.
	(cc1plus): Add cc1plus-checksum.o.

In objc/:
2005-05-18  Geoffrey Keating  <geoffk@apple.com>

	* Make-lang.in (cc1obj-dummy): New.
	(cc1obj-checksum.c): New.
	(cc1obj-checksum.o): New.
	(cc1obj): Add cc1obj-checksum.o.

In objcp/:
2005-05-18  Geoffrey Keating  <geoffk@apple.com>

	* Make-lang.in (cc1objplus-dummy): New.
	(cc1objplus-checksum.c): New.
	(cc1objplus-checksum.o): New.
	(cc1objplus): Add cc1objplus-checksum.o.

From-SVN: r99928

1 files changed, 77 insertions, 0 deletions

diff --git a/gcc/genchecksum.c b/gcc/genchecksum.c
new file mode 100644
index 0000000..465a4f6
--- /dev/null
+++ b/gcc/genchecksum.c
@@ -0,0 +1,77 @@
+/* Generate checksums of executables for PCH validation
+   Copyright (C) 2005
+   Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+#include "bconfig.h"
+#include "system.h"
+#include "md5.h"
+
+static void
+usage (void)
+{
+  fputs ("Usage: genchecksums <filename>\n", stderr);
+}
+
+static void
+dosum (const char *file)
+{
+  FILE *f;
+  unsigned char result[16];
+  int i;
+  
+  f = fopen (file, "rb");
+  if (!f)
+    {
+      fprintf (stderr, "opening %s: %s\n", file, xstrerror (errno));
+      exit (1);
+    }
+  
+  /* Some executable formats have timestamps in the first 16 bytes, yuck.  */
+  if (fseek (f, 16, SEEK_SET) != 0)
+     {
+      fprintf (stderr, "seeking in %s: %s\n", file, xstrerror (errno));
+      exit (1);
+    }
+  
+  if (md5_stream (f, result) != 0
+      || fclose (f) != 0)
+     {
+      fprintf (stderr, "reading %s: %s\n", file, xstrerror (errno));
+      exit (1);
+    }
+
+  fputs ("const unsigned char executable_checksum[16] = { ", stdout);
+  for (i = 0; i < 16; i++)
+    printf ("%#02x%s", result[i], i == 15 ? " };\n" : ", ");
+}
+
+int
+main (int argc, char ** argv)
+{
+  if (argc != 2)
+    {
+      usage ();
+      return 1;
+    }
+
+  dosum (argv[1]);
+
+  return 0;
+}