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-rw-r--r--gcc/cccp.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/cccp.c b/gcc/cccp.c
index ecc4b3b65cd..eff9c915e25 100644
--- a/gcc/cccp.c
+++ b/gcc/cccp.c
@@ -4626,9 +4626,13 @@ static int
absolute_filename (filename)
char *filename;
{
-#if defined (__MSDOS__) || defined (_WIN32)
+#if defined (__MSDOS__) || (defined (_WIN32) && !defined (__CYGWIN32__))
if (isalpha (filename[0]) && filename[1] == ':') filename += 2;
#endif
+#if defined (__CYGWIN32__)
+ /* At present, any path that begins with a drive spec is absolute. */
+ if (isalpha (filename[0]) && filename[1] == ':') return 1;
+#endif
if (filename[0] == '/') return 1;
#ifdef DIR_SEPARATOR
if (filename[0] == DIR_SEPARATOR) return 1;