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[PATCH] Check for POSIX_MADV_WILLNEED to support building against the LSB


The Linux Standard Base APIs include posix_madvise() but don't define
values for the 'advice' argument.  Check to see if POSIX_MADV_WILLNEED
is defined before using.

OK for trunk?

-- Michael

2012-06-11 Michael Hope <michael.hope@linaro.org>

	* dwarf2read.c (dwarf2_read_section): Check for
	POSIX_MADV_WILLNEED.

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 589361e..91fab5a 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -1773,7 +1773,7 @@ dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)

       if ((caddr_t)info->buffer != MAP_FAILED)
        {
-#if HAVE_POSIX_MADVISE
+#if HAVE_POSIX_MADVISE && defined(POSIX_MADV_WILLNEED)
          posix_madvise (info->map_addr, info->map_len, POSIX_MADV_WILLNEED);
 #endif
          return;


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