I plan to check in the following patch as obvious after it passed
testing.
cygwin has a MADV_DONTNEED, but does not use mmap. The ifdefs for
madvise assumed this wouldn't happen and it broke the cygwin build.
Just don't set USING_MADVISE when USING_MMAP is not set. Thanks
to Kai Titz for testing.
-Andi
2011-10-17 Andi Kleen <a...@linux.intel.com>
* ggc-page.c (USING_MADVISE): Adjust ifdef to check for
USING_MMAP.
diff --git a/gcc/ggc-page.c b/gcc/ggc-page.c
index 9b35291..2da99db 100644
--- a/gcc/ggc-page.c
+++ b/gcc/ggc-page.c
@@ -50,7 +50,7 @@ along with GCC; see the file COPYING3. If not see
#define USING_MALLOC_PAGE_GROUPS
#endif
-#if defined(HAVE_MADVISE) && defined(MADV_DONTNEED)
+#if defined(HAVE_MADVISE) && defined(MADV_DONTNEED) && defined(USING_MMAP)
# define USING_MADVISE
#endif
--
1.7.5.4
--
a...@linux.intel.com -- Speaking for myself only.
