added missing includes and a define to compile it for recent machines

I use arch btw

CMakeLists.txt

@@ -668,6 +668,8 @@ install(FILES DSView/icons/logo.svg DESTINATION share/pixmaps RENAME dsview.svg)
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")	
 	install(FILES DSView/DSView.desktop DESTINATION /usr/share/applications RENAME dsview.desktop)
 	
+	add_compile_definitions(_DEFAULT_SOURCE)
+
 	if(IS_DIRECTORY /usr/lib/udev/rules.d)
 		install(FILES DSView/DreamSourceLab.rules DESTINATION /usr/lib/udev/rules.d RENAME 60-dreamsourcelab.rules)
 	elseif(IS_DIRECTORY /lib/udev/rules.d)

libsigrok4DSL/input/in_wav.c

@@ -24,6 +24,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
+#include <strings.h>
 #include "../log.h"
 #include <stdlib.h>
 

libsigrok4DSL/strutil.c

@@ -21,6 +21,7 @@
 #include "libsigrok-internal.h"
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <stdio.h>
 #include "log.h"