updated cmake for mac/linux

src/cmake/FindASSIMP.cmake

@@ -115,7 +115,7 @@ if (WIN32)
 
 ELSEIF(APPLE)
 
-    FIND_PATH(ASSIMP_INCLUDE_PATH assimp/defs.h
+    FIND_PATH(ASSIMP_INCLUDE_DIR assimp/defs.h
 	PATHS
 		${ASSIMP_ADDITIONAL_SEARCH_DIRS}
     ${ASSIMP_ROOT_ENV}/include)
@@ -129,7 +129,7 @@ ELSEIF(APPLE)
 
 ELSE()
 
-    FIND_PATH(ASSIMP_INCLUDE_PATH assimp/defs.h
+    FIND_PATH(ASSIMP_INCLUDE_DIR assimp/defs.h
 	PATHS ${ASSIMP_ADDITIONAL_SEARCH_DIRS}
 		)
     FIND_LIBRARY(ASSIMP_LIBRARY

src/cmake/FindOpenGL3.cmake

@@ -7,7 +7,9 @@
 # OpenGL3_LIBRARY
 # 
 
-file(TO_CMAKE_PATH $ENV{OpenGL_ROOT} OpenGL_ROOT_ENV)
+IF(DEFINED ENV{OpenGL_ROOT})
+	file(TO_CMAKE_PATH $ENV{OpenGL_ROOT} OpenGL_ROOT_ENV)
+ENDIF()
 
 IF (WIN32)
   FIND_PATH( OpenGL3_INCLUDE_PATH