11:32:38 zeev@Zmbp2 ~/ddcctl/ddcctl-master > make install
gcc -Wall -c -o DDC.o DDC.c
In file included from DDC.c:13:
./DDC.h:88:5: warning: declaration does not declare anything [-Wmissing-declarations]
    union inputbitmap {
    ^
./DDC.h:186:13: warning: declaration does not declare anything [-Wmissing-declarations]
            union sync {
            ^
DDC.c:99:24: warning: 'CGDisplayIOServicePort' is deprecated: first deprecated in OS X 10.9 [-Wdeprecated-declarations]
    if ((framebuffer = CGDisplayIOServicePort(displayID))) { // FIXME: DEPRECATED!
                       ^
/System/Library/Frameworks/CoreGraphics.framework/Headers/CGDisplayConfiguration.h:355:24: note:
      'CGDisplayIOServicePort' has been explicitly marked deprecated here
CG_EXTERN io_service_t CGDisplayIOServicePort(CGDirectDisplayID display)
                       ^
DDC.c:167:19: warning: unused variable 'kr' [-Wunused-variable]
    kern_return_t kr;
                  ^
DDC.c:16:21: warning: unused function 'IOServicePortFromCGDisplayID' [-Wunused-function]
static io_service_t IOServicePortFromCGDisplayID(CGDirectDisplayID displayID)
                    ^
5 warnings generated.
gcc -Wall -o ddcctl -lobjc -framework IOKit -framework AppKit -framework Foundation DDC.o ddcctl.m
In file included from ddcctl.m:20:
./DDC.h:88:5: warning: declaration does not declare anything [-Wmissing-declarations]
    union inputbitmap {
    ^
./DDC.h:186:13: warning: declaration does not declare anything [-Wmissing-declarations]
            union sync {
            ^
2 warnings generated.
install ddcctl /usr/local/bin