gcc/testsuite/ChangeLog:

2014-11-05  Anthony Brandon  <anthony.brandon@gmail.com>

	PR driver/36312
	* gcc.misc-tests/output.exp: New test case for identical input and
	output files.

include/ChangeLog:

2014-11-05  Anthony Brandon  <anthony.brandon@gmail.com>

	PR driver/36312
	* filenames.h: Add prototype for canonical_filename_eq.

gcc/ChangeLog:

2014-11-05  Anthony Brandon  <anthony.brandon@gmail.com>

	PR driver/36312
	* diagnostic-core.h: Add prototype for fatal_error.
	* diagnostic.c (fatal_error): New function fatal_error.
	* gcc.c (store_arg): Remove have_o_argbuf_index.
	(process_command): Check if input and output files are the same.
	* toplev.c (init_asm_output): Check if input and output files are
	the same.

libiberty/ChangeLog:

2014-11-05  Anthony Brandon  <anthony.brandon@gmail.com>

	PR driver/36312
	* filename_cmp.c (canonical_filename_eq): New function to check if
	file names are the same.
	* functions.texi: Updated with documentation for new function.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@217149 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 50 insertions, 4 deletions

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index ff06b184aaa..738965cc99f 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,10 @@
+2014-11-05  Anthony Brandon  <anthony.brandon@gmail.com>
+
+	PR driver/36312
+	* filename_cmp.c (canonical_filename_eq): New function to check if
+	file names are the same.
+	* functions.texi: Updated with documentation for new function.
+
 2014-11-05  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* sigsetmask.c (_POSIX_SOURCE): Remove.
diff --git a/libiberty/filename_cmp.c b/libiberty/filename_cmp.c
index 9e16d242086..150488cbab1 100644
--- a/libiberty/filename_cmp.c
+++ b/libiberty/filename_cmp.c
@@ -24,8 +24,13 @@
 #include <string.h>
 #endif
 
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
 #include "filenames.h"
 #include "safe-ctype.h"
+#include "libiberty.h"
 
 /*
 
@@ -190,3 +195,27 @@ filename_eq (const void *s1, const void *s2)
   /* The casts are for -Wc++-compat.  */
   return filename_cmp ((const char *) s1, (const char *) s2) == 0;
 }
+
+/*
+
+@deftypefn Extension int canonical_filename_eq (const char *@var{a}, const char *@var{b})
+
+Return non-zero if file names @var{a} and @var{b} are equivalent.
+This function compares the canonical versions of the filenames as returned by
+@code{lrealpath()}, so that so that different file names pointing to the same
+underlying file are treated as being identical.
+
+@end deftypefn
+
+*/
+
+int
+canonical_filename_eq (const char * a, const char * b)
+{
+  char * ca = lrealpath(a);
+  char * cb = lrealpath(b);
+  int res = filename_eq (ca, cb);
+  free (ca);
+  free (cb);
+  return res;
+}
diff --git a/libiberty/functions.texi b/libiberty/functions.texi
index 3627285f905..9ed9ff03438 100644
--- a/libiberty/functions.texi
+++ b/libiberty/functions.texi
@@ -125,6 +125,16 @@ Uses @code{malloc} to allocate storage for @var{nelem} objects of
 
 @end deftypefn
 
+@c filename_cmp.c:201
+@deftypefn Extension int canonical_filename_eq (const char *@var{a}, const char *@var{b})
+
+Return non-zero if file names @var{a} and @var{b} are equivalent.
+This function compares the canonical versions of the filenames as returned by
+@code{lrealpath()}, so that so that different file names pointing to the same
+underlying file are treated as being identical.
+
+@end deftypefn
+
 @c choose-temp.c:45
 @deftypefn Extension char* choose_temp_base (void)
 
@@ -286,7 +296,7 @@ value 1).  If @var{valu} is zero, zero is returned.
 
 @end deftypefn
 
-@c filename_cmp.c:32
+@c filename_cmp.c:37
 @deftypefn Extension int filename_cmp (const char *@var{s1}, const char *@var{s2})
 
 Return zero if the two file names @var{s1} and @var{s2} are equivalent.
@@ -303,7 +313,7 @@ and backward slashes are equal.
 
 @end deftypefn
 
-@c filename_cmp.c:178
+@c filename_cmp.c:183
 @deftypefn Extension int filename_eq (const void *@var{s1}, const void *@var{s2})
 
 Return non-zero if file names @var{s1} and @var{s2} are equivalent.
@@ -311,7 +321,7 @@ This function is for use with hashtab.c hash tables.
 
 @end deftypefn
 
-@c filename_cmp.c:147
+@c filename_cmp.c:152
 @deftypefn Extension hashval_t filename_hash (const void *@var{s})
 
 Return the hash value for file name @var{s} that will be compared
@@ -320,7 +330,7 @@ This function is for use with hashtab.c hash tables.
 
 @end deftypefn
 
-@c filename_cmp.c:89
+@c filename_cmp.c:94
 @deftypefn Extension int filename_ncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n})
 
 Return zero if the two file names @var{s1} and @var{s2} are equivalent