dev-util/ltrace/files/ltrace-0.7.3-pid_t.patch

--- a/proc.h
+++ b/proc.h
@@ -26,6 +26,7 @@
 #include "config.h"
 
 #include <sys/time.h>
+#include <unistd.h> /* pid_t */
 
 #if defined(HAVE_LIBUNWIND)
 # include <libunwind.h>