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-rw-r--r--CMakeLists.txt13
1 files changed, 12 insertions, 1 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5a588c..007c662 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,7 @@
cmake_minimum_required(VERSION 3.15)
project(ninja)
+# --- optional link-time optimization
if(CMAKE_BUILD_TYPE MATCHES "Release")
include(CheckIPOSupported)
check_ipo_supported(RESULT lto_supported OUTPUT error)
@@ -13,13 +14,23 @@ if(CMAKE_BUILD_TYPE MATCHES "Release")
endif()
endif()
+# --- compiler flags
if(MSVC)
set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
string(APPEND CMAKE_CXX_FLAGS " /W4 /GR- /Zc:__cplusplus")
else()
- string(APPEND CMAKE_CXX_FLAGS " -Wno-deprecated -fdiagnostics-color")
+ include(CheckCXXCompilerFlag)
+ check_cxx_compiler_flag(-Wno-deprecated flag_no_deprecated)
+ if(flag_no_deprecated)
+ string(APPEND CMAKE_CXX_FLAGS " -Wno-deprecated")
+ endif()
+ check_cxx_compiler_flag(-fdiagnostics-color flag_color_diag)
+ if(flag_color_diag)
+ string(APPEND CMAKE_CXX_FLAGS " -fdiagnostics-color")
+ endif()
endif()
+# --- optional re2c
find_program(RE2C re2c)
if(RE2C)
# the depfile parser and ninja lexers are generated using re2c.