Use optional package gl headers

src/add-ons/screen_savers/flurry/Jamfile

@@ -1,4 +1,5 @@
 SubDir HAIKU_TOP src add-ons screen_savers flurry ;
+SubDirSysHdrs $(HAIKU_MESA_HEADERS) ;
 
 AddResources Message : Flurry.rdef ;
 

src/add-ons/screen_savers/flurry/Shared.h

@@ -34,6 +34,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <math.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include <GL/gl.h>
 #include <GL/glu.h>

src/apps/glteapot/Jamfile

@@ -1,4 +1,5 @@
 SubDir HAIKU_TOP src apps glteapot ;
+SubDirSysHdrs $(HAIKU_MESA_HEADERS) ;
 
 SetSubDirSupportedPlatformsBeOSCompatible ;
 

src/apps/glteapot/util.h

@@ -7,6 +7,7 @@
 #define UTIL_H
 
 #include <memory.h>
+#include <stdlib.h>
 #include "error.h"
 
 template <class contents>

src/preferences/opengl/Jamfile

@@ -1,4 +1,5 @@
 SubDir HAIKU_TOP src preferences opengl ;
+SubDirSysHdrs $(HAIKU_MESA_HEADERS) ;
 
 UsePrivateHeaders interface ;