[游戏开发]CMAKE_step3:库的interface用法需求

可以带这些用法的有如下函数：

• target_compile_definitions()

• target_compile_options()

• target_include_directories()

• target_link_libraries()

以target_include_directories()的INTERFACE用法为例，

将上一文章中的MathFunctions库为例，

MathFunctions文件夹中的CMakeLists.txt与文件夹外的CMakeLists.txt变化如下，

• 文件夹内CMakeLists.txt

add_library(MathFunctions mysqrt.cxx)

target_include_directories(MathFunctions
? ? ? ? ? INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
? ? ? ? ? )

• 文件夹外CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

#set the project name and version
project(Tutorial VERSION 1.0)

#specify the C++ standard
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED True)

option(USE_MYMATH "Use tutorial provided math implementation" ON)

configure_file(TutorialConfig.h.in TutorialConfig.h)

if(USE_MYMATH)
? ? #add the MathFunctions Library
? ? add_subdirectory(MathFunctions)

? ? list(APPEND EXTRA_LIBS MathFunctions)
endif()

#add the executable
add_executable(Tutorial tutorial.cxx)

target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS})?

target_include_directories(Tutorial PUBLIC
? ? ? ? ? ? ? ? ? ? ? ? ? ?"${PROJECT_BINARY_DIR}"
? ? ? ? ? ? ? ? ? ? ? ? ? ?)

?

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