diff options
Diffstat (limited to 'common.cmake')
| -rw-r--r-- | common.cmake | 144 |
1 files changed, 125 insertions, 19 deletions
diff --git a/common.cmake b/common.cmake index 546db7d..f718dbf 100644 --- a/common.cmake +++ b/common.cmake @@ -23,7 +23,8 @@ if(NOT POLICY CMP0054) endif() cmake_policy(SET CMP0054 NEW) -# Toolset identification: +# Toolset identification +# ---------------------- if(CMAKE_C_COMPILER_ID) set(toolset "${CMAKE_C_COMPILER_ID}") @@ -37,11 +38,14 @@ if(toolset STREQUAL "GNU") set(is_gcc ON) elseif(toolset STREQUAL "MSVC") set(is_msvc ON) +elseif(toolset STREQUAL "Clang") + set(is_clang ON) else() message(WARNING "common.cmake: Unrecognized toolset: ${toolset}") endif() -# User-defined switches: +# User-defined switches +# --------------------- set(default_value ON) get_directory_property(parent_dir PARENT_DIRECTORY) @@ -63,10 +67,6 @@ if(NOT DEFINED CC_STATIC_RUNTIME) if(DEFINED Boost_USE_STATIC_LIBS AND NOT Boost_USE_STATIC_LIBS) # Linking to dynamic Boost libs and the static runtime is a no-no: set(static_runtime_default_value OFF) - elseif(CMAKE_SYSTEM_NAME STREQUAL "Windows" OR MINGW) - else() - # At this point, Linux-like environment & the GNU C Library are assumed. - set(static_runtime_default_value OFF) endif() option(CC_STATIC_RUNTIME "Link the runtime statically" "${static_runtime_default_value}") endif() @@ -87,13 +87,15 @@ if(NOT parent_dir) message(STATUS "common.cmake: Strip symbols: ${CC_STRIP_SYMBOLS}") endif() -# C++ standard version: +# C++ standard +# ------------ set(CMAKE_CXX_STANDARD "${CC_CXX_STANDARD}") set(CMAKE_CXX_STANDARD_REQUIRED ON) set(CMAKE_CXX_EXTENSIONS OFF) -# Common compiler options: +# Common compiler options +# ----------------------- function(_cc_best_practices_msvc target) set(compile_options /MP /W4) @@ -118,7 +120,8 @@ function(_cc_best_practices target) endif() endfunction() -# Useful Windows macros: +# Useful Windows macros +# --------------------- function(_cc_common_windows_definitions target) set(compile_definitions WIN32_LEAN_AND_MEAN NOMINMAX) @@ -135,12 +138,70 @@ function(_cc_common_windows_definitions target) endif() endfunction() -# Static runtime: +# Static runtime +# -------------- + +function(_cc_join output glue) + set(tmp "") + set(this_glue "") + foreach(arg ${ARGN}) + set(tmp "${tmp}${this_glue}${arg}") + set(this_glue "${glue}") + endforeach() + set("${output}" "${tmp}" PARENT_SCOPE) +endfunction() + +function(_cc_replace_flags str sub) + # Whenever this is used, it fucking sucks, but was tested on at least some + # CMake version. + set(flags_list + CMAKE_CXX_FLAGS + CMAKE_CXX_FLAGS_DEBUG + CMAKE_CXX_FLAGS_RELWITHDEBINFO + CMAKE_CXX_FLAGS_RELEASE + CMAKE_CXX_FLAGS_MINSIZEREL + CMAKE_C_FLAGS + CMAKE_C_FLAGS_DEBUG + CMAKE_C_FLAGS_RELWITHDEBINFO + CMAKE_C_FLAGS_RELEASE + CMAKE_C_FLAGS_MINSIZEREL) + foreach(flags ${flags_list}) + if(NOT ${flags}) + continue() + endif() + set(value "${${flags}}") + string(REPLACE "${str}" "${sub}" value "${value}") + get_property(original_docstring CACHE ${flags} PROPERTY HELPSTRING) + set(${flags} "${value}" CACHE STRING "${original_docstring}" FORCE) + endforeach() +endfunction() + +# MSVC_RUNTIME_LIBRARY is a convenient way to select the runtime library, but +# it's only available starting from 3.15. +# Additionally, it has to be enabled outside of this file (either via +# cmake_policy or setting the cmake_minimum_required to the appropriate value). + +if(POLICY CMP0091) + cmake_policy(GET CMP0091 msvc_runtime_policy) + # Use a variable as an indicator that the policy is in effect. + if(msvc_runtime_policy STREQUAL "NEW") + set(msvc_runtime_policy ON) + else() + unset(msvc_runtime_policy) + endif() +endif() + +function(_cc_static_runtime_via_policy target) + set_property(TARGET "${target}" PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>") +endfunction() function(_cc_static_runtime_msvc target) - target_compile_options("${target}" PRIVATE - $<$<CONFIG:Debug>:/MTd> - $<$<NOT:$<CONFIG:Debug>>:/MT>) + if(msvc_runtime_policy) + _cc_static_runtime_via_policy("${target}") + else() + _cc_replace_flags("/MDd" "/MTd") + _cc_replace_flags("/MD" "/MT") + endif() endfunction() function(_cc_static_runtime_gcc target) @@ -148,10 +209,51 @@ function(_cc_static_runtime_gcc target) # target_link_libraries: #target_link_libraries("${target}" PRIVATE -static) - set_property(TARGET "${target}" APPEND_STRING PROPERTY LINK_FLAGS " -static") + set(flags -static-libstdc++ -static-libgcc) + if(CYGWIN) + set(flags -static-libgcc) + endif() + + if(CMAKE_VERSION VERSION_LESS "3.13") + _cc_join(flags_str " " ${flags}) + set_property(TARGET "${target}" APPEND_STRING PROPERTY LINK_FLAGS " ${flags_str}") + else() + target_link_options("${target}" PRIVATE ${flags}) + endif() +endfunction() + +function(_cc_static_runtime_clang target) + if(NOT WIN32) + # On Linux, clang/clang++ is used, which is treated as GCC. + # This is consistent with CMake (see Modules/Platform/Linux-Clang-CXX.cmake). + _cc_static_runtime_gcc("${target}") + return() + endif() + + # On Windows, clang/clang++ can be used since 3.15; otherwise, clang-cl is + # is used, which is treated as MSVC. + # This is consistent with CMake (see Modules/Platform/Windows-Clang.cmake). + if(CMAKE_VERSION VERSION_LESS "3.15") + _cc_static_runtime_msvc("${target}") + return() + endif() + + # If the policy is enabled, we don't need to patch the flags manually. + if(msvc_runtime_policy) + _cc_static_runtime_via_policy("${target}") + return() + endif() + + if("${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "MSVC" OR "${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "MSVC") + # It's 3.15 or higher, but we're in luck: clang-cl is used, which can + # be treated as MSVC. + _cc_static_runtime_msvc("${target}") + return() + endif() - # Or (haven't tested this), if CMake 3.13+ is used: - #target_link_options("${target}" PRIVATE -static) + # Well, that sucks, but works for versions 3.15--3.18 at least. + _cc_replace_flags("-D_DLL" "") + _cc_replace_flags("--dependent-lib=msvcrt" "--dependent-lib=libcmt") endfunction() function(_cc_static_runtime target) @@ -163,11 +265,14 @@ function(_cc_static_runtime target) _cc_static_runtime_msvc("${target}") elseif(is_gcc) _cc_static_runtime_gcc("${target}") + elseif(is_clang) + _cc_static_runtime_clang("${target}") endif() endif() endfunction() -# Symbol stripping: +# Symbol stripping +# ---------------- function(_cc_strip_symbols_gcc target) # This causes issues with mixing keyword- and plain- versions of @@ -183,13 +288,14 @@ function(_cc_strip_symbols target) get_target_property(aliased "${target}" ALIASED_TARGET) if(NOT target_type STREQUAL "INTERFACE_LIBRARY" AND NOT aliased) message(STATUS "common.cmake: ${target}: Stripping symbols for release configurations") - if(is_gcc) + if(is_gcc OR is_clang) _cc_strip_symbols_gcc("${target}") endif() endif() endfunction() -# Main macros: +# Main macros +# ----------- function(_cc_apply_settings target) if(TARGET "${target}") |