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include(CheckCXXCompilerFlag)
include(CheckCCompilerFlag)
include(CheckLinkerFlag)
function(EnableCompilerFlag _flag _C _CXX _LD)
string(REGEX REPLACE "\\+" "PLUS" varname "${_flag}")
string(REGEX REPLACE "[^A-Za-z0-9]+" "_" varname "${varname}")
string(REGEX REPLACE "^_+" "" varname "${varname}")
string(TOUPPER "${varname}" varname)
if (_C)
CHECK_C_COMPILER_FLAG(${_flag} C_FLAG_${varname})
if (C_FLAG_${varname})
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_flag}" PARENT_SCOPE)
endif ()
endif ()
if (_CXX)
CHECK_CXX_COMPILER_FLAG(${_flag} CXX_FLAG_${varname})
if (CXX_FLAG_${varname})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${_flag}" PARENT_SCOPE)
endif ()
endif ()
if (_LD)
CHECK_LINKER_FLAG(C ${_flag} LD_FLAG_${varname})
if (LD_FLAG_${varname})
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${_flag}" PARENT_SCOPE)
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${_flag}" PARENT_SCOPE)
endif ()
endif ()
endfunction()
macro(ADD_ZSTD_COMPILATION_FLAGS)
if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang" OR MINGW) #Not only UNIX but also WIN32 for MinGW
# It's possible to select the exact standard used for compilation.
# It's not necessary, but can be employed for specific purposes.
# Note that zstd source code is compatible with both C++98 and above
# and C-gnu90 (c90 + long long + variadic macros ) and above
# EnableCompilerFlag("-std=c++11" false true) # Set C++ compilation to c++11 standard
# EnableCompilerFlag("-std=c99" true false) # Set C compiation to c99 standard
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND MSVC)
# clang-cl normally maps -Wall to -Weverything.
EnableCompilerFlag("/clang:-Wall" true true false)
else ()
EnableCompilerFlag("-Wall" true true false)
endif ()
EnableCompilerFlag("-Wextra" true true false)
EnableCompilerFlag("-Wundef" true true false)
EnableCompilerFlag("-Wshadow" true true false)
EnableCompilerFlag("-Wcast-align" true true false)
EnableCompilerFlag("-Wcast-qual" true true false)
EnableCompilerFlag("-Wstrict-prototypes" true false false)
# Enable asserts in Debug mode
if (CMAKE_BUILD_TYPE MATCHES "Debug")
EnableCompilerFlag("-DDEBUGLEVEL=1" true true false)
endif ()
# Add noexecstack flags
# LDFLAGS
EnableCompilerFlag("-z noexecstack" false false true)
# CFLAGS & CXXFLAGS
EnableCompilerFlag("-Qunused-arguments" true true false)
EnableCompilerFlag("-Wa,--noexecstack" true true false)
elseif (MSVC) # Add specific compilation flags for Windows Visual
set(ACTIVATE_MULTITHREADED_COMPILATION "ON" CACHE BOOL "activate multi-threaded compilation (/MP flag)")
if (CMAKE_GENERATOR MATCHES "Visual Studio" AND ACTIVATE_MULTITHREADED_COMPILATION)
EnableCompilerFlag("/MP" true true false)
endif ()
# UNICODE SUPPORT
EnableCompilerFlag("/D_UNICODE" true true false)
EnableCompilerFlag("/DUNICODE" true true false)
# Enable asserts in Debug mode
if (CMAKE_BUILD_TYPE MATCHES "Debug")
EnableCompilerFlag("/DDEBUGLEVEL=1" true true false)
endif ()
endif ()
# Remove duplicates compilation flags
foreach (flag_var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if( ${flag_var} )
separate_arguments(${flag_var})
string(REPLACE ";" " " ${flag_var} "${${flag_var}}")
endif()
endforeach ()
if (MSVC AND ZSTD_USE_STATIC_RUNTIME)
foreach (flag_var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if ( ${flag_var} )
string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
endif()
endforeach ()
endif ()
endmacro()
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