When compiling xfstests with either gcc 6.4.1 or 7.2.1 I see the following
warning:
In file included from /usr/include/stdio.h:27:0,
from fssum.c:25:
/usr/include/features.h:148:3: warning: #warning "_BSD_SOURCE and _SVID_SOURCE
are deprecated, use _DEFAULT_SOURCE" [-Wcpp]
# warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
^~~~~~~
The feature_test_macros(7) man page says this about _BSD_SOURCE:
Since glibc 2.20, this macro is deprecated. It now has the same effect as
defining _DEFAULT_SOURCE, but generates a compile-time warning (unless
_DEFAULT_SOURCE is also defined). Use _DEFAULT_SOURCE instead. To allow
code that requires _BSD_SOURCE in glibc 2.19 and earlier and
_DEFAULT_SOURCE in glibc 2.20 and later to compile without warnings,
define both _BSD_SOURCE and _DEFAULT_SOURCE.
Keep backwards compatibility with older code by defining both _BSD_SOURCE
and _DEFAULT_SOURCE.
Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
---
src/fssum.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/fssum.c b/src/fssum.c
index 04052cdc..13111d6f 100644
--- a/src/fssum.c
+++ b/src/fssum.c
@@ -17,6 +17,7 @@
*/
#ifdef __linux__
#define _BSD_SOURCE
+#define _DEFAULT_SOURCE
#define _LARGEFILE64_SOURCE
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
--
2.14.3
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