remove -Wnested-externs warning for CMake/unix, since this is used a lot, if we want to remove it can be re-enabled.

fix view3d python errors with no object/edit object.

CMakeLists.txt

@@ -72,6 +72,7 @@ OPTION(WITH_FFTW3         "Enable FFTW3 support" OFF)
 OPTION(WITH_JACK          "Enable Jack Support (http://www.jackaudio.org)" OFF)
 OPTION(WITH_SNDFILE       "Enable libsndfile Support (http://www.mega-nerd.com/libsndfile)" OFF)
 OPTION(WITH_CXX_GUARDEDALLOC "Enable GuardedAlloc for C++ memory allocation" OFF)
+# OPTION(WITH_BUILDINFO     "Include extra build details" ON)
 OPTION(WITH_INSTALL       "Install accompanying scripts and language files needed to run blender" ON)
 
 IF(NOT WITH_GAMEENGINE AND WITH_PLAYER)
@@ -212,7 +213,7 @@ IF(UNIX AND NOT APPLE)
   SET(PLATFORM_LINKFLAGS "-pthread")
 
   # Better warnings
-  SET(C_WARNINGS "-Wall -Wno-char-subscripts -Wpointer-arith -Wcast-align -Wnested-externs -Wdeclaration-after-statement")
+  SET(C_WARNINGS "-Wall -Wno-char-subscripts -Wpointer-arith -Wcast-align -Wdeclaration-after-statement")
   SET(CXX_WARNINGS "-Wall -Wno-invalid-offsetof -Wno-sign-compare")
 
   INCLUDE_DIRECTORIES(${JPEG_INCLUDE_DIR} ${PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
@@ -511,6 +512,17 @@ IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
   SET(BINRELOC_INC ${BINRELOC}/include)
 ENDIF(CMAKE_SYSTEM_NAME MATCHES "Linux")
 
+
+# TODO - buildinfo
+# IF(UNIX)
+#   IF(WITH_BUILDINFO)
+#     EXEC_PROGRAM("date \"+%Y-%m-%d\"" OUTPUT_VARIABLE BUILD_DATE)
+#     EXEC_PROGRAM("date \"+%H:%M:%S\"" OUTPUT_VARIABLE BUILD_TIME)  
+#     EXEC_PROGRAM("svnversion ${CMAKE_SOURCE_DIR}" OUTPUT_VARIABLE BUILD_REV)
+#     SET(BUILD_TYPE ${CMAKE_BUILD_TYPE})
+#   ENDIF(WITH_BUILDINFO)
+# ENDIF(UNIX)
+
 #-----------------------------------------------------------------------------
 # Common.