Use canonicalize_file_name unconditionally

gdb:

2014-11-28  Yao Qi  <yao@codesourcery.com>

	* configure.ac (AC_CHECK_FUNCS): Remove canonicalize_file_name
	and realpath.
	* config.in: Re-generated.
	* configure: Re-generated.
	* utils.c (gdb_realpath): Remove code calling realpath,
	canonicalize_file_name and pathconf.
	[!_WIN32]: Call canonicalize_file_name.

1 files changed, 7 insertions, 61 deletions

diff --git a/gdb/utils.c b/gdb/utils.c
index ff5c00d..b3720f6 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -2868,67 +2868,6 @@ string_to_core_addr (const char *my_string)
 char *
 gdb_realpath (const char *filename)
 {
-  /* Method 1: The system has a compile time upper bound on a filename
-     path.  Use that and realpath() to canonicalize the name.  This is
-     the most common case.  Note that, if there isn't a compile time
-     upper bound, you want to avoid realpath() at all costs.  */
-#if defined (HAVE_REALPATH) && defined (PATH_MAX)
-  {
-    char buf[PATH_MAX];
-    const char *rp = realpath (filename, buf);
-
-    if (rp == NULL)
-      rp = filename;
-    return xstrdup (rp);
-  }
-#endif /* HAVE_REALPATH */
-
-  /* Method 2: The host system (i.e., GNU) has the function
-     canonicalize_file_name() which malloc's a chunk of memory and
-     returns that, use that.  */
-#if defined(HAVE_CANONICALIZE_FILE_NAME)
-  {
-    char *rp = canonicalize_file_name (filename);
-
-    if (rp == NULL)
-      return xstrdup (filename);
-    else
-      return rp;
-  }
-#endif
-
-  /* FIXME: cagney/2002-11-13:
-
-     Method 2a: Use realpath() with a NULL buffer.  Some systems, due
-     to the problems described in method 3, have modified their
-     realpath() implementation so that it will allocate a buffer when
-     NULL is passed in.  Before this can be used, though, some sort of
-     configure time test would need to be added.  Otherwize the code
-     will likely core dump.  */
-
-  /* Method 3: Now we're getting desperate!  The system doesn't have a
-     compile time buffer size and no alternative function.  Query the
-     OS, using pathconf(), for the buffer limit.  Care is needed
-     though, some systems do not limit PATH_MAX (return -1 for
-     pathconf()) making it impossible to pass a correctly sized buffer
-     to realpath() (it could always overflow).  On those systems, we
-     skip this.  */
-#if defined (HAVE_REALPATH) && defined (_PC_PATH_MAX)
-  {
-    /* Find out the max path size.  */
-    long path_max = pathconf ("/", _PC_PATH_MAX);
-
-    if (path_max > 0)
-      {
-	/* PATH_MAX is bounded.  */
-	char *buf = alloca (path_max);
-	char *rp = realpath (filename, buf);
-
-	return xstrdup (rp ? rp : filename);
-      }
-  }
-#endif
-
   /* The MS Windows method.  If we don't have realpath, we assume we
      don't have symlinks and just canonicalize to a Windows absolute
      path.  GetFullPath converts ../ and ./ in relative paths to
@@ -2946,6 +2885,13 @@ gdb_realpath (const char *filename)
     if (len > 0 && len < MAX_PATH)
       return xstrdup (buf);
   }
+#else
+  {
+    char *rp = canonicalize_file_name (filename);
+
+    if (rp != NULL)
+      return rp;
+  }
 #endif
 
   /* This system is a lost cause, just dup the buffer.  */