[getdns-users] [PATCH] define _DEFAULT_SOURCE as well as _BSD_SOURCE for glibc version 2.20 and up

[Daniel Kahn Gillmor]

in recent versions of feature_test_macros(7), it says of _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.
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 5e6d663..fe086ba 100644
--- a/configure.ac
+++ b/configure.ac
@@ -98,7 +98,7 @@ AX_CHECK_COMPILE_FLAG([-xc99],[CFLAGS="$CFLAGS -xc99"],[],[])
 AX_CHECK_COMPILE_FLAG([-Wall],[CFLAGS="$CFLAGS -Wall"],[],[])
 
 case "$host_os" in
-  linux* ) CFLAGS="$CFLAGS -D_BSD_SOURCE"
+  linux* ) CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"
   ;;
   solaris* ) CFLAGS="$CFLAGS -D__EXTENSIONS__"  # for strdup() from <string.h>
   ;;
-- 
2.6.4