--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -673,11 +673,6 @@
         "${CMAKE_BUILD_TYPE}" STREQUAL "release-internal" OR
         "${CMAKE_BUILD_TYPE}" STREQUAL "releaseinternal")
         set (COMMON_COMPILE_OPTIONS ${COMMON_COMPILE_OPTIONS}
-            -O3                 # optimize for speed with conforming optimizations
-            -ffast-math         # enable fast-math optimizations (equivalent intent to -Ofast)
-            -Werror             # treats warning as errors
-            -fvisibility=hidden # hides non-exported symbols
-            -flto               # enables Link-Time Optimization (LTO) at compile-time; must be consistent with LTO at link-time
             -fPIC               # generates position-independent code during the compilation phase
             )
     endif ()