[PATCH 3/4] Make workaround for old glibc getsubopt() glibc-specific

[Felix Janda <felix.janda@xxxxxxxxx>]

Signed-off-by: Felix Janda <felix.janda@xxxxxxxxx>
---
 include/linux.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux.h b/include/linux.h
index f6d0f80..873b682 100644
--- a/include/linux.h
+++ b/include/linux.h
@@ -132,7 +132,7 @@ platform_discard_blocks(int fd, uint64_t start, uint64_t 
len)
        return 0;
 }
 
-#if (__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ <= 1))
+#if defined(__GLIBC__) && ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && 
(__GLIBC_MINOR__ <= 1)))
 # define getsubopt(p, s, v)    getsubopt(p, (const char * const *)s, v)
 #endif
 
-- 
2.7.3