Add gcc-ar/nm/ranlib wrappers for slim LTO v2

gcc/:
2011-10-19  Andi Kleen  <ak@linux.intel.com>

	* Makefile.in (MOSTLYCLEANFILES): Add gcc-ar/nm/ranlib.
	(native): Add gcc-ar, gcc-nm, gcc-ranlib.
	(AR_LIBS, gcc-ar, gcc-ar.o, gcc-ranlib, gcc-ranlib.o,
         gcc-nm, gcc-nm.o, gcc-ranlib.c, gcc-nm.c): Add.
	(install): Depend on install-gcc-ar.
	(install-gcc-ar): Add.
	(uninstall): Uninstall gcc-ar, gcc-nm, gcc-ranlib.
	* gcc-ar.c: Add new file.

From-SVN: r180642

1 files changed, 96 insertions, 0 deletions

diff --git a/gcc/gcc-ar.c b/gcc/gcc-ar.c
new file mode 100644
index 0000000..fc7e4a2
--- /dev/null
+++ b/gcc/gcc-ar.c
@@ -0,0 +1,96 @@
+/* Wrapper for ar/ranlib/nm to pass the LTO plugin.
+   Copyright (C) 2011 Free Software Foundation, Inc.
+   Contributed by Andi Kleen.
+
+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 3, 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 COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include "config.h"
+#include "system.h"
+#include "libiberty.h"
+
+#ifndef PERSONALITY
+#error "Please set personality"
+#endif
+
+static const char standard_libexec_prefix[] = STANDARD_LIBEXEC_PREFIX;
+static const char standard_bin_prefix[] = STANDARD_BINDIR_PREFIX;
+
+static const char dir_separator[] = { DIR_SEPARATOR, 0 };
+
+int 
+main(int ac, char **av)
+{
+  const char *nprefix;
+  const char *exe_name;
+  char *plugin;
+  int k, status, err;
+  const char *err_msg;
+  const char **nargv;
+  bool is_ar = !strcmp (PERSONALITY, "ar");
+
+  exe_name = PERSONALITY;
+#ifdef CROSS_DIRECTORY_STRUCTURE
+  exe_name = concat (target_machine, "-", exe_name, NULL);
+#endif
+
+  /* Find plugin */
+  /* XXX implement more magic from gcc.c? */
+  nprefix = getenv ("GCC_EXEC_PREFIX");
+  if (!nprefix)
+    nprefix = standard_libexec_prefix;
+
+  nprefix = make_relative_prefix (av[0], 
+				  standard_bin_prefix, 
+				  nprefix);
+  plugin = concat (nprefix,
+		   dir_separator,
+                   DEFAULT_TARGET_MACHINE, 
+		   dir_separator,
+		   DEFAULT_TARGET_VERSION,
+	           dir_separator,
+		   LTOPLUGINSONAME,
+		   NULL);
+  if (access (plugin, X_OK))
+    {
+      fprintf (stderr, "%s: Cannot find plugin %s\n", av[0], plugin);
+      exit (1);
+    }
+
+  /* Create new command line with plugin */
+  nargv = XCNEWVEC (const char *, ac + 4);
+  nargv[0] = exe_name;
+  nargv[1] = "--plugin";
+  nargv[2] = plugin;
+  if (is_ar && av[1] && av[1][0] != '-')
+    av[1] = concat("-", av[1], NULL);
+  for (k = 1; k < ac; k++)
+    nargv[2 + k] = av[k];
+  nargv[2 + k] = NULL;
+
+  /* Run utility */
+  /* ??? the const is misplaced in pex_one's argv? */
+  err_msg = pex_one (PEX_LAST|PEX_SEARCH, 
+		     exe_name, 
+		     CONST_CAST2 (char * const *, const char **, nargv),
+		     concat("gcc-", exe_name, NULL), 
+		     NULL,NULL,  &status, &err);
+  if (err_msg) 
+    fprintf(stderr, "Error running %s: %s\n", exe_name, err_msg);
+
+  return err;
+}