src/sigs.c: Define "_BSD_SOURCE" and "__BSD_VISIBLE"

SIGWINCH isn't POSIX-compatible and causes a compile error on several
platforms, such as OpenBSD:

    sigs.c: In function 'generic_hdlr':
    sigs.c:63: error: 'SIGWINCH' undeclared (first use in this function)
    sigs.c:63: error: (Each undeclared identifier is reported only once
    sigs.c:63: error: for each function it appears in.)
    sigs.c: In function 'sigs_init':
    sigs.c:97: error: 'SIGWINCH' undeclared (first use in this function)
    *** Error code 1

Define "_BSD_SOURCE" explicitly in this compilation unit to enforce
definition of the "SIGWINCH" constant. Also, set "__BSD_VISIBLE" to 1
since FreeBSD doesn't honor "_BSD_SOURCE".

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/sigs.c b/src/sigs.c
index 4f5d982..4cc01bf 100644
--- a/src/sigs.c
+++ b/src/sigs.c
@@ -34,6 +34,16 @@
  *
  */
 
+#ifndef _BSD_SOURCE
+/* Needed for SIGWINCH on OpenBSD. */
+#define _BSD_SOURCE
+#endif
+
+#ifndef __BSD_VISIBLE
+/* Needed for SIGWINCH on FreeBSD. */
+#define __BSD_VISIBLE 1
+#endif
+
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>