reverted 87faea7 for #783 (just don't include OptimizerCeres if -DWIT…

…H_CERES=OFF even if floam or okvis did include it)

CMakeLists.txt

@@ -892,9 +892,9 @@ ENDIF()
 IF(NOT MRPT_FOUND)
    SET(MRPT "//")
 ENDIF(NOT MRPT_FOUND)
-IF(NOT CERES_FOUND)
+IF(NOT WITH_CERES OR NOT CERES_FOUND)
    SET(CERES "//")
-ENDIF(NOT CERES_FOUND)
+ENDIF(NOT WITH_CERES OR NOT CERES_FOUND)
 IF(NOT WITH_TORO)
    SET(TORO "//")
 ENDIF(NOT WITH_TORO)
@@ -1406,12 +1406,8 @@ ELSE()
 MESSAGE(STATUS " *With GTSAM                = NO (GTSAM not found)")
 ENDIF()
 
-IF(CERES_FOUND)
-IF(WITH_CERES)
+IF(WITH_CERES AND CERES_FOUND)
 MESSAGE(STATUS " *With Ceres ${Ceres_VERSION}         = YES (License: BSD)")
-ELSE()
-MESSAGE(STATUS " *With Ceres ${Ceres_VERSION}         = YES (License: BSD, WITH_CERES=OFF but it is enabled by okvis or floam dependencies)")
-ENDIF()
 ELSEIF(NOT WITH_CERES)
 MESSAGE(STATUS " *With Ceres                = NO (WITH_CERES=OFF)")
 ELSE()