delete -Werror and -O3
diff --git a/octomap/CMakeModules/CompilerSettings.cmake b/octomap/CMakeModules/CompilerSettings.cmake
index bae0cc4..a4920fd 100644
--- a/octomap/CMakeModules/CompilerSettings.cmake
+++ b/octomap/CMakeModules/CompilerSettings.cmake
@@ -10,8 +10,8 @@ MESSAGE (STATUS "${PROJECT_NAME} building as ${CMAKE_BUILD_TYPE}")
 # COMPILER FLAGS
 IF (CMAKE_COMPILER_IS_GNUCC)
   SET (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-error ")
-  SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -Wextra -Wpedantic")
-  SET (CMAKE_CXX_FLAGS_RELEASE "-O3 -funroll-loops -DNDEBUG")
+  SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wpedantic")
+  SET (CMAKE_CXX_FLAGS_RELEASE "-funroll-loops -DNDEBUG")
   SET (CMAKE_CXX_FLAGS_DEBUG "-O0 -g")
   # Shared object compilation under 64bit (vtable)
   ADD_DEFINITIONS(-fPIC)