libsupport: fix sort_r.h to work on FreeBSD

FreeBSD defines __GNU_SOURCE so this is not reliable marker that the
OS is using a glibc-style qsort_r(3).

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/lib/support/sort_r.h b/lib/support/sort_r.h
index 156e990..3292a26 100644 (file)
--- a/lib/support/sort_r.h
+++ b/lib/support/sort_r.h
@@ -24,7 +24,7 @@ void sort_r(void *base, size_t nel, size_t width,
 
 #define _SORT_R_INLINE inline
 
-#if (defined _GNU_SOURCE || defined __gnu_hurd__ || defined __GNU__ || \
+#if (defined __gnu_hurd__ || defined __GNU__ || \
        defined __linux__ || defined __MINGW32__ || defined __GLIBC__)
 #  define _SORT_R_LINUX
 #elif (defined __APPLE__ || defined __MACH__ || defined __DARWIN__ || \