build: Maybe fix OpenBSD

We'll see how this goes...

3 files changed, 12 insertions, 5 deletions

diff --git a/config.h.in b/config.h.in
index eb2470a..ece0ddc 100644
--- a/config.h.in
+++ b/config.h.in
@@ -162,6 +162,15 @@
 #define DFM_MARGIN 3
 
 //
+// OS specific flags.
+//
+#ifdef __linux__
+#define _GNU_SOURCE
+#define _BSD_SOURCE
+#define _POSIX_C_SOURCE 200809L
+#endif
+
+//
 // Configuration overrides from ./configure.
 //
 #include "$CFG_MACRO_GEN"
diff --git a/configure b/configure
index b169a66..6c21732 100755
--- a/configure
+++ b/configure
@@ -63,11 +63,8 @@ export STRIP="${STRIP:-strip}"
 # Compiler flags.
 #
 export cc_flags="-std=$c_version -O2 -pipe"
-export cc_flags="$cc_flags -D_POSIX_C_SOURCE=200809L"
-export cc_flags="$cc_flags -D_BSD_SOURCE -D_GNU_SOURCE"
 export cc_flags="$cc_flags -Wall -Wextra -pedantic -Wshadow"
 
-
 #///////////////////////////////////////////////////////////////////////////////
 #
 # NOTE: Do not edit below this line.
diff --git a/dfm.c b/dfm.c
index c2fa0d5..6a2d16a 100644
--- a/dfm.c
+++ b/dfm.c
@@ -33,6 +33,9 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
+
+#include "config.h"
+
 #include <assert.h>
 #include <dirent.h>
 #include <errno.h>
@@ -50,8 +53,6 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
-#include "config.h"
-
 #include "lib/arg.h"
 #include "lib/bitset.h"
 #include "lib/date.h"