build: implicitly include config.h

config.h is meant to be around in all files, as it contains stuff like
_GNU_SOURCE, NDEBUG and HAVE_*.

Make these definitions available without needing to #include config.h
every single time.

Signed-off-by: Ran Benita <ran234@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

Makefile.am

@@ -11,6 +11,7 @@ noinst_LTLIBRARIES = libkmscon-core.la
 AM_CFLAGS = \
 	-Wall
 AM_CPPFLAGS = \
+	-include $(top_builddir)/config.h \
 	-I $(srcdir)/src \
 	-I $(srcdir)/external
 AM_LDFLAGS = \

src/log.h

@@ -38,8 +38,6 @@
 #include <stdarg.h>
 #include <stdlib.h>
 
-#include "config.h"
-
 /* LOG_EMERG and LOG_ALERT do not make sense for this application */
 #define LOG_CRIT	"<2>" /* error that cannot be handled correctly */
 #define LOG_ERR		"<3>" /* error detected */

src/pty.c

@@ -23,9 +23,6 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-/* for pty functions */
-#define _XOPEN_SOURCE 700
-
 #include <errno.h>
 #include <fcntl.h>
 #include <paths.h>

tests/test_console.c

@@ -39,8 +39,6 @@
  * $ ls -la | ./test_console
  */
 
-#define _BSD_SOURCE
-
 #include <errno.h>
 #include <inttypes.h>
 #include <locale.h>