CMake: fix building without libmv

extern/ceres/CMakeLists.txt

@@ -257,8 +257,13 @@ set(SRC
 )
 
 set(LIB
+)
+
+if(WITH_LIBMV OR WITH_GTESTS OR (WITH_CYCLES AND WITH_CYCLES_LOGGING))
+	list(APPEND LIB
 		extern_glog
 	)
+endif()
 
 if(WITH_LIBMV_SCHUR_SPECIALIZATIONS)
 	list(APPEND SRC

extern/glog/CMakeLists.txt

@@ -54,8 +54,13 @@ set(SRC
 )
 
 set(LIB
+)
+
+if(NOT WITH_SYSTEM_GFLAGS)
+	list(APPEND LIB
 		extern_gflags
 	)
+endif()
 
 if(WIN32)
 	list(APPEND SRC

intern/libmv/CMakeLists.txt

@@ -34,8 +34,7 @@ set(SRC
 )
 
 set(LIB
-	extern_ceres
-	extern_glog
+
 )
 
 if(WITH_LIBMV)
@@ -58,6 +57,11 @@ if(WITH_LIBMV)
 		${ZLIB_INCLUDE_DIRS}
 	)
 
+	list(APPEND LIB
+		extern_ceres
+		extern_glog
+	)
+
 	add_definitions(
 		-DWITH_LIBMV_GUARDED_ALLOC
 		-DLIBMV_NO_FAST_DETECTOR=

intern/libmv/bundle.sh

@@ -113,8 +113,7 @@ set(SRC
 )
 
 set(LIB
-	extern_ceres
-	extern_glog
+
 )
 
 if(WITH_LIBMV)
@@ -137,6 +136,11 @@ if(WITH_LIBMV)
 		\${ZLIB_INCLUDE_DIRS}
 	)
 
+	list(APPEND LIB
+		extern_ceres
+		extern_glog
+	)
+
 	add_definitions(
 		-DWITH_LIBMV_GUARDED_ALLOC
 		-DLIBMV_NO_FAST_DETECTOR=