collect2.c (find_a_file): Use HAVE_DOS_BASED_FILE_SYSTEM in place of the DIR_SEPARATOR test.

        * collect2.c (find_a_file): Use HAVE_DOS_BASED_FILE_SYSTEM in place
        of the DIR_SEPARATOR test.
        Consider any file starting with a drivename to be absolute.
        If the absolute filename test fails and EXECUTABLE_SUFFIX is
        defined, append EXECUTABLE_SUFFIX to the file and try again.
        * cppinit.c (base_name): Use HAVE_DOS_BASED_FILE_SYSTEM
        in place of __MSDOS__ and _WIN32.
        * cppfiles.c (simplify_pathname): Likewise.
        * gcc.c (IS_DIR_SEPARATOR): Define new macro. Returns true if a
        character is a directory separator.
        (find_a_file): Use it.
        (convert_filename): Likewise.
        (process_command): Likewise.
        (do_spec_1): Likewise.
        (is_directory): Likewise.
        (main): Likewise.
        * prefix.c (IS_DIR_SEPARATOR): Define. Tests whether a character is
        a directory separator.
        (translate_name): Use it.
        (update_path): Change DIR_SEPARATOR_2 to DIR_SEPARATOR. Fix
        warning in block where '/' is changed to DIR_SEPARATOR.
        * i386/xm-djgpp.h (DIR_SEPARATOR): Set to '/'.
        (DIR_SEPARATOR_2): New macro. Set to '\'.
        (HAVE_DOS_BASED_FILESYS): Define.
        * i386/xm-mingw32.h: Updated copyright. Set
        DIR_SEPARATOR_2 to '/'. Define HAVE_DOS_BASED_FILE_SYSTEM.
        * i386/xm-os2.h: Likewise.
        * winnt/xm-winnt.h: Likewise.
        * i386/xm-dos.h: Likewise.  Add copyright.

From-SVN: r26328

1 files changed, 33 insertions, 14 deletions

diff --git a/gcc/prefix.c b/gcc/prefix.c
index e5ca923..8bf5696 100644
--- a/gcc/prefix.c
+++ b/gcc/prefix.c
@@ -81,6 +81,17 @@ static char *lookup_key		PROTO((char *));
 static HKEY reg_key = (HKEY) INVALID_HANDLE_VALUE;
 #endif
 
+#ifndef DIR_SEPARATOR
+# define IS_DIR_SEPARATOR(ch) ((ch) == '/')
+#else /* DIR_SEPARATOR */
+# ifndef DIR_SEPARATOR_2
+#  define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
+# else /* DIR_SEPARATOR && DIR_SEPARATOR_2 */
+#  define IS_DIR_SEPARATOR(ch) \
+	(((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
+# endif /* DIR_SEPARATOR && DIR_SEPARATOR_2 */
+#endif /* DIR_SEPARATOR */
+
 /* Given KEY, as above, return its value.  */
 
 static const char *
@@ -241,11 +252,7 @@ translate_name (name)
     return name;
 
   for (keylen = 0;
-       (name[keylen + 1] != 0 && name[keylen + 1] != '/'
-#ifdef DIR_SEPARATOR
-	&& name[keylen + 1] != DIR_SEPARATOR
-#endif
-	);
+       (name[keylen + 1] != 0 && !IS_DIR_SEPARATOR (name[keylen + 1]));
        keylen++)
     ;
 
@@ -268,11 +275,7 @@ translate_name (name)
     prefix = PREFIX;
 
   /* Remove any trailing directory separator from what we got.  */
-  if (prefix[strlen (prefix) - 1] == '/'
-#ifdef DIR_SEPARATOR
-      || prefix[strlen (prefix) - 1] == DIR_SEPARATOR
-#endif
-      )
+  if (IS_DIR_SEPARATOR (prefix[strlen (prefix) - 1]))
     {
       char * temp = save_string (prefix, strlen (prefix));
       temp[strlen (temp) - 1] = 0;
@@ -299,17 +302,33 @@ update_path (path, key)
       while (path[0] == '@' || path[0] == '$')
 	path = translate_name (path);
     }
+
+#ifdef DIR_SEPARATOR_2
+  /* Convert DIR_SEPARATOR_2 to DIR_SEPARATOR. */
+  if (DIR_SEPARATOR != DIR_SEPARATOR_2)
+    {
+      int i;
+      int len = strlen (path);
+      char *new_path = save_string (path, len);
+      for (i = 0; i < len; i++)
+        if (new_path[i] == DIR_SEPARATOR_2)
+          new_path[i] = DIR_SEPARATOR;
+      path = new_path;
+    }
+#endif
       
-#ifdef DIR_SEPARATOR
+#if defined (DIR_SEPARATOR) && !defined (DIR_SEPARATOR_2)
   if (DIR_SEPARATOR != '/')
     {
       int i;
       int len = strlen (path);
+      char *new_path = save_string (path, len);
 
-      path = save_string (path, len);
       for (i = 0; i < len; i++)
-	if (path[i] == '/')
-	  path[i] = DIR_SEPARATOR;
+        if (new_path[i] == '/')
+          new_path[i] = DIR_SEPARATOR;
+
+      path = new_path;
     }
 #endif