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-rw-r--r--src/CMakeLists.txt11
1 files changed, 9 insertions, 2 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index db8645c64..6afa5b8fe 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -696,7 +696,7 @@ else()
set(RELEASE_WARNING_FLAGS "")
endif()
- if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+ if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
set(WARNING_FLAGS "${WARNING_FLAGS} -Wsign-compare")
endif()
if(APPLE AND USE_LUAJIT)
@@ -713,7 +713,14 @@ else()
if(CMAKE_SYSTEM_NAME MATCHES "(Darwin|BSD|DragonFly)")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Os")
else()
- set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -ffast-math -fomit-frame-pointer")
+ set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -fomit-frame-pointer")
+ if(CMAKE_SYSTEM_NAME STREQUAL "Linux"
+ AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
+ AND CMAKE_CXX_COMPILER_VERSION MATCHES "^9\\.")
+ # Clang 9 has broken -ffast-math on glibc
+ else()
+ set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -ffast-math")
+ endif()
endif(CMAKE_SYSTEM_NAME MATCHES "(Darwin|BSD|DragonFly)")
set(CMAKE_CXX_FLAGS_SEMIDEBUG "-g -O1 -Wall -Wabi ${WARNING_FLAGS} ${OTHER_FLAGS}")
set(CMAKE_CXX_FLAGS_DEBUG "-g -O0 -Wall -Wabi ${WARNING_FLAGS} ${OTHER_FLAGS}")