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-rw-r--r--CMakeModules/AppendCompilerFlags.cmake38
1 files changed, 38 insertions, 0 deletions
diff --git a/CMakeModules/AppendCompilerFlags.cmake b/CMakeModules/AppendCompilerFlags.cmake
new file mode 100644
index 000000000000..58d3f99ec2bb
--- /dev/null
+++ b/CMakeModules/AppendCompilerFlags.cmake
@@ -0,0 +1,38 @@
+include(CheckCSourceCompiles)
+include(CheckCXXSourceCompiles)
+
+macro(append_c_compiler_flags _flags _name _result)
+ set(SAFE_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+ string(REGEX REPLACE "[-+/ ]" "_" cname "${_name}")
+ string(TOUPPER "${cname}" cname)
+ foreach(flag ${_flags})
+ string(REGEX REPLACE "^[-+/ ]+(.*)[-+/ ]*$" "\\1" flagname "${flag}")
+ string(REGEX REPLACE "[-+/ ]" "_" flagname "${flagname}")
+ string(TOUPPER "${flagname}" flagname)
+ set(have_flag "HAVE_${cname}_${flagname}")
+ set(CMAKE_REQUIRED_FLAGS "${flag}")
+ check_c_source_compiles("int main() { return 0; }" ${have_flag})
+ if(${have_flag})
+ set(${_result} "${${_result}} ${flag}")
+ endif(${have_flag})
+ endforeach(flag)
+ set(CMAKE_REQUIRED_FLAGS ${SAFE_CMAKE_REQUIRED_FLAGS})
+endmacro(append_c_compiler_flags)
+
+macro(append_cxx_compiler_flags _flags _name _result)
+ set(SAFE_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+ string(REGEX REPLACE "[-+/ ]" "_" cname "${_name}")
+ string(TOUPPER "${cname}" cname)
+ foreach(flag ${_flags})
+ string(REGEX REPLACE "^[-+/ ]+(.*)[-+/ ]*$" "\\1" flagname "${flag}")
+ string(REGEX REPLACE "[-+/ ]" "_" flagname "${flagname}")
+ string(TOUPPER "${flagname}" flagname)
+ set(have_flag "HAVE_${cname}_${flagname}")
+ set(CMAKE_REQUIRED_FLAGS "${flag}")
+ check_cxx_source_compiles("int main() { return 0; }" ${have_flag})
+ if(${have_flag})
+ set(${_result} "${${_result}} ${flag}")
+ endif(${have_flag})
+ endforeach(flag)
+ set(CMAKE_REQUIRED_FLAGS ${SAFE_CMAKE_REQUIRED_FLAGS})
+endmacro(append_cxx_compiler_flags)