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-rw-r--r--common.cmake149
1 files changed, 104 insertions, 45 deletions
diff --git a/common.cmake b/common.cmake
index 2d5e9f9..2d9f7e0 100644
--- a/common.cmake
+++ b/common.cmake
@@ -1,15 +1,27 @@
# Copyright (c) 2017 Egor Tensin <Egor.Tensin@gmail.com>
-# It's a CMake code snippet I use in all of my CMake projects.
-# It makes targets link the runtime statically by default + strips debug
-# symbols in release builds.
-# The latest version can be found at
-# https://github.com/egor-tensin/cmake-common.
# Distributed under the MIT License.
-# Version: 2019-11-29T22:30:28Z
+# It's a CMake code snippet I use in all of my CMake projects.
+# It makes targets link the runtime statically by default, strips debug symbols
+# in release builds and sets a couple of useful compilation options.
+
+# Add this to the top-level CMakeLists.txt (unless a higher version has already
+# been specified):
+#
+# cmake_minimum_required(VERSION 3.1)
-get_directory_property(parent_directory PARENT_DIRECTORY)
-set(is_root_project $<NOT:parent_directory>)
+# Otherwise this line:
+#
+# if(toolset STREQUAL "MSVC")
+#
+# evaluates to false even when using Visual Studio (since MSVC is a predefined
+# variable; it's completely bonkers).
+if(NOT POLICY CMP0054)
+ message(FATAL_ERROR "common.cmake uses CMP0054, which is unsupported by this CMake version")
+endif()
+cmake_policy(SET CMP0054 NEW)
+
+# Toolset identification:
if(CMAKE_C_COMPILER)
set(toolset "${CMAKE_C_COMPILER_ID}")
@@ -18,79 +30,126 @@ elseif(CMAKE_CXX_COMPILER)
else()
set(toolset "unknown")
endif()
+message(STATUS "Toolset: ${toolset}")
+
+if(toolset STREQUAL "GNU")
+ set(is_gcc ON)
+elseif(toolset STREQUAL "MSVC")
+ set(is_msvc ON)
+else()
+ message(WARNING "Unrecognized toolset: ${toolset}")
+endif()
-set(USE_STATIC_RUNTIME "${is_root_project}" CACHE BOOL "Link the runtime statically")
-set(STRIP_SYMBOL_TABLE "${is_root_project}" CACHE BOOL "Strip symbol tables")
-set(CXX_STANDARD "17" CACHE BOOL "Set C++ standard version")
+# Compilation options almost always useful:
-if(is_root_project)
- if(MSVC)
- add_compile_options(/MP /W4)
- elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
- add_compile_options(-Wall -Wextra)
+function(best_practices_msvc target)
+ set(compile_options /MP /W4)
+ set(compile_definitions WIN32_LEAN_AND_MEAN NOMINMAX)
+ get_target_property(target_type "${target}" TYPE)
+ if(target_type STREQUAL "INTERFACE_LIBRARY")
+ target_compile_definitions("${target}" INTERFACE ${compile_definitions})
else()
- message(WARNING "Unrecognized toolset: ${toolset}")
+ target_compile_options("${target}" PRIVATE ${compile_options})
+ target_compile_definitions("${target}" PRIVATE ${compile_definitions})
+ endif()
+endfunction()
+
+function(best_practices_gcc target)
+ set(compile_options -Wall -Wextra)
+ get_target_property(target_type "${target}" TYPE)
+ if(NOT target_type STREQUAL "INTERFACE_LIBRARY")
+ target_compile_options("${target}" PRIVATE ${compile_options})
+ endif()
+endfunction()
+
+function(best_practices target)
+ if(is_msvc)
+ best_practices_msvc("${target}")
+ elseif(is_gcc)
+ best_practices_gcc("${target}")
endif()
+endfunction()
+
+# User-defined switches:
+
+set(default_value ON)
+get_directory_property(parent_directory PARENT_DIRECTORY)
+if(parent_directory)
+ set(default_value OFF)
endif()
-set(CMAKE_CXX_STANDARD "${CXX_STANDARD}")
+option(CC_BEST_PRACTICES "Apply useful compilation options" "${default_value}")
+option(CC_STATIC_RUNTIME "Link the runtime statically" "${default_value}")
+option(CC_STRIP_SYMBOLS "Strip debug symbols" "${default_value}")
+set(CC_CXX_STANDARD "14" CACHE STRING "C++ standard version")
+
+message(STATUS "Best practices: ${CC_BEST_PRACTICES}")
+message(STATUS "Static runtime: ${CC_STATIC_RUNTIME}")
+message(STATUS "Strip symbols: ${CC_STRIP_SYMBOLS}")
+message(STATUS "C++ standard: ${CC_CXX_STANDARD}")
+
+# C++ standard version:
+
+set(CMAKE_CXX_STANDARD "${CC_CXX_STANDARD}")
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
-function(use_static_runtime_msvc target)
+# Static runtime routines:
+
+function(static_runtime_msvc target)
get_target_property(target_type "${target}" TYPE)
- if(target_type STREQUAL INTERFACE_LIBRARY)
- else()
+ if(NOT target_type STREQUAL "INTERFACE_LIBRARY")
target_compile_options("${target}" PRIVATE
$<$<CONFIG:Debug>:/MTd>
$<$<NOT:$<CONFIG:Debug>>:/MT>)
endif()
endfunction()
-function(use_static_runtime_gcc target)
+function(static_runtime_gcc target)
get_target_property(target_type "${target}" TYPE)
- if(target_type STREQUAL EXECUTABLE)
+ if(target_type STREQUAL "EXECUTABLE")
target_link_libraries("${target}" PRIVATE -static)
endif()
endfunction()
-function(use_static_runtime target)
- if(MSVC)
- use_static_runtime_msvc("${target}")
- elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
- use_static_runtime_gcc("${target}")
- else()
- message(WARNING "Unrecognized toolset: ${toolset}")
+function(static_runtime target)
+ if(is_msvc)
+ static_runtime_msvc("${target}")
+ elseif(is_gcc)
+ static_runtime_gcc("${target}")
endif()
endfunction()
-function(strip_symbol_table_gcc target)
+# Symbol stripping routines:
+
+function(strip_symbols_gcc target)
get_target_property(target_type "${target}" TYPE)
- set(release_build $<OR:$<CONFIG:Release>,$<CONFIG:MinSizeRel>>)
- if(target_type STREQUAL INTERFACE_LIBRARY)
- else()
+ if(NOT target_type STREQUAL "INTERFACE_LIBRARY")
+ set(release_build $<OR:$<CONFIG:Release>,$<CONFIG:MinSizeRel>>)
target_link_libraries("${target}" PRIVATE $<${release_build}:-s>)
endif()
endfunction()
-function(strip_symbol_table target)
- if(MSVC)
- elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
- strip_symbol_table_gcc("${target}")
- else()
- message(WARNING "Unrecognized toolset: ${toolset}")
+function(strip_symbols target)
+ if(is_gcc)
+ strip_symbols_gcc("${target}")
endif()
endfunction()
+# Main macros:
+
function(apply_common_settings target)
if(TARGET "${target}")
get_target_property(target_imported "${target}" IMPORTED)
- if(target_imported STREQUAL NOTFOUND OR NOT target_imported)
- if(STRIP_SYMBOL_TABLE)
- strip_symbol_table("${target}")
+ if(NOT target_imported)
+ if(CC_BEST_PRACTICES)
+ best_practices("${target}")
+ endif()
+ if(CC_STRIP_SYMBOLS)
+ strip_symbols("${target}")
endif()
- if(USE_STATIC_RUNTIME)
- use_static_runtime("${target}")
+ if(CC_STATIC_RUNTIME)
+ static_runtime("${target}")
endif()
endif()
endif()
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