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132 lines
3.3 KiB
132 lines
3.3 KiB
3 years ago
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cmake_minimum_required(VERSION 3.18)
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project(PchReuseFromObjLib)
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set(CMAKE_PCH_WARN_INVALID OFF)
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if(CMAKE_CXX_COMPILE_OPTIONS_USE_PCH)
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add_definitions(-DHAVE_PCH_SUPPORT)
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endif()
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######################################################################
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file(WRITE ${CMAKE_BINARY_DIR}/CONFIG/config.hxx "/*empty*/\n")
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file(WRITE ${CMAKE_BINARY_DIR}/pch.cxx [=[
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void nothing()
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{
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}
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]=])
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file(WRITE ${CMAKE_BINARY_DIR}/string.hxx [=[
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#include <string.h>
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namespace std {
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struct string
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{
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char storage[20];
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string(const char* s) {
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strcpy(storage, s);
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}
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const char* c_str() const {
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return storage;
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}
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};
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}
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]=])
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add_library(pch-generator OBJECT ${CMAKE_BINARY_DIR}/pch.cxx)
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set_property(TARGET pch-generator PROPERTY POSITION_INDEPENDENT_CODE ON)
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target_precompile_headers(pch-generator PRIVATE ${CMAKE_BINARY_DIR}/string.hxx)
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target_include_directories(pch-generator PRIVATE ${CMAKE_BINARY_DIR}/CONFIG)
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######################################################################
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file(WRITE ${CMAKE_BINARY_DIR}/message.cxx [=[
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#include "message.hxx"
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#ifndef HAVE_PCH_SUPPORT
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#include "string.hxx"
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#endif
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const char* message()
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{
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static std::string greeting("hi there");
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return greeting.c_str();
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}
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]=])
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file(WRITE ${CMAKE_BINARY_DIR}/message.hxx [=[
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#include "config.hxx"
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#ifdef WIN32_BUILD_SHARED
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#ifdef BUILD_LIBRARY
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#define MESSAGE_EXPORT __declspec(dllexport)
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#else
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#define MESSAGE_EXPORT __declspec(dllimport)
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#endif
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#else
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#define MESSAGE_EXPORT
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#endif
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MESSAGE_EXPORT const char* message();
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]=])
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######################################################################
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file(WRITE ${CMAKE_BINARY_DIR}/main.cxx [=[
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#include "message.hxx"
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#include <string.h>
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int main()
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{
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return strcmp(message(), "hi there");
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}
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]=])
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######################################################################
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enable_testing()
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function(add_library_and_executable type)
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add_library(message_${type} ${type} ${CMAKE_BINARY_DIR}/message.cxx)
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target_precompile_headers(message_${type} REUSE_FROM pch-generator)
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set_property(TARGET message_${type} PROPERTY POSITION_INDEPENDENT_CODE ON)
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set_property(TARGET message_${type} PROPERTY DEFINE_SYMBOL "")
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if (WIN32 AND type STREQUAL "SHARED")
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file(WRITE ${CMAKE_BINARY_DIR}/SHARED/config.hxx [=[
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#define BUILD_LIBRARY
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#define WIN32_BUILD_SHARED
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]=])
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target_include_directories(message_${type} PRIVATE ${CMAKE_BINARY_DIR}/SHARED)
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# Workaround for VS2008, the compiler fails with
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# c1xx : fatal error C1083: Cannot open source file: '_WINDLL': No such file or directory
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file(WRITE ${CMAKE_BINARY_DIR}/_WINDLL "/*empty*/\n")
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else()
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target_include_directories(message_${type} PRIVATE ${CMAKE_BINARY_DIR}/CONFIG)
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endif()
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add_executable(main_${type} ${CMAKE_BINARY_DIR}/main.cxx)
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target_include_directories(main_${type} PRIVATE ${CMAKE_BINARY_DIR})
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if (WIN32 AND type STREQUAL "SHARED")
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file(WRITE ${CMAKE_BINARY_DIR}/main_SHARED/config.hxx "#define WIN32_BUILD_SHARED\n")
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target_include_directories(main_${type} PRIVATE ${CMAKE_BINARY_DIR}/main_SHARED)
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else()
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target_include_directories(main_${type} PRIVATE ${CMAKE_BINARY_DIR}/CONFIG)
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endif()
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target_link_libraries(main_${type} PRIVATE message_${type})
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add_test(NAME main_${type} COMMAND main_${type})
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endfunction()
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foreach(type OBJECT STATIC SHARED)
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add_library_and_executable(${type})
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endforeach()
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