[libiberty/filename_cmp] Darwin has case-insensitive filesystems

include/ChangeLog:

        * filenames.h (HAVE_CASE_INSENSITIVE_FILE_SYSTEM): Define
        on Darwin, as well as on the systems that use a DOS-like
        filesystem.

libiberty/ChangeLog:

        * filename_cmp.c (filename_cmp, filename_ncmp): Add handling of
        HAVE_CASE_INSENSITIVE_FILE_SYSTEM.

1 files changed, 22 insertions, 6 deletions

diff --git a/libiberty/filename_cmp.c b/libiberty/filename_cmp.c
index 0eed120..5179f8d 100644
--- a/libiberty/filename_cmp.c
+++ b/libiberty/filename_cmp.c
@@ -50,19 +50,27 @@ and backward slashes are equal.
 int
 filename_cmp (const char *s1, const char *s2)
 {
-#ifndef HAVE_DOS_BASED_FILE_SYSTEM
+#if !defined(HAVE_DOS_BASED_FILE_SYSTEM) \
+    && !defined(HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
   return strcmp(s1, s2);
 #else
   for (;;)
     {
-      int c1 = TOLOWER (*s1);
-      int c2 = TOLOWER (*s2);
+      int c1 = *s1;
+      int c2 = *s2;
 
+#if defined (HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
+      c1 = TOLOWER (c1);
+      c2 = TOLOWER (c2);
+#endif
+
+#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
       /* On DOS-based file systems, the '/' and the '\' are equivalent.  */
       if (c1 == '/')
         c1 = '\\';
       if (c2 == '/')
         c2 = '\\';
+#endif
 
       if (c1 != c2)
         return (c1 - c2);
@@ -100,21 +108,29 @@ and backward slashes are equal.
 int
 filename_ncmp (const char *s1, const char *s2, size_t n)
 {
-#ifndef HAVE_DOS_BASED_FILE_SYSTEM
+#if !defined(HAVE_DOS_BASED_FILE_SYSTEM) \
+    && !defined(HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
   return strncmp(s1, s2, n);
 #else
   if (!n)
     return 0;
   for (; n > 0; --n)
   {
-      int c1 = TOLOWER (*s1);
-      int c2 = TOLOWER (*s2);
+      int c1 = *s1;
+      int c2 = *s2;
 
+#if defined (HAVE_CASE_INSENSITIVE_FILE_SYSTEM)
+      c1 = TOLOWER (c1);
+      c2 = TOLOWER (c2);
+#endif
+
+#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
       /* On DOS-based file systems, the '/' and the '\' are equivalent.  */
       if (c1 == '/')
         c1 = '\\';
       if (c2 == '/')
         c2 = '\\';
+#endif
 
       if (c1 == '\0' || c1 != c2)
         return (c1 - c2);