Revert using _POSIX_C_SOURCE.

It didn't fix the issue.

src/Telodendria.c

@@ -41,14 +41,6 @@
 #include <Matrix.h>
 #include <Db.h>
 
-#ifdef __OpenBSD__
-extern int
-pledge(const char *, const char *);
-
-extern int
-unveil(const char *, const char *);
-#endif
-
 static void
 TelodendriaMemoryHook(MemoryAction a, MemoryInfo * i, void *args)
 {

tools/bin/td

@@ -22,7 +22,7 @@
 : "${TELODENDRIA_VERSION:=0.2.0}"
 : "${CVS_TAG:=Telodendria-$(echo $TELODENDRIA_VERSION | sed 's/\./_/g')}"
 
-: "${DEFINES:=-D_POSIX_C_SOURCE=200809L -DTELODENDRIA_VERSION=\"$TELODENDRIA_VERSION\"}"
+: "${DEFINES:=-D_DEFAULT_SOURCE -DTELODENDRIA_VERSION=\"$TELODENDRIA_VERSION\"}"
 : "${INCLUDES:=-Isrc/include}"
 
 : "${CC:=cc}"