Question

给出以下CMakeLists.txt和一些任意的hello.c：

cmake_minimum_required(VERSION 2.6)

get_filename_component(debug_rpath ${CMAKE_CURRENT_BINARY_DIR}/hello-debug.exe REALPATH)
message(STATUS "debug exe: ${debug_rpath}")
get_filename_component(release_rpath ${CMAKE_CURRENT_BINARY_DIR}/hello-release.exe REALPATH)
message(STATUS "release exe: ${release_rpath}")

add_custom_command(
  OUTPUT hello-release.exe
  COMMAND clang ${CMAKE_SOURCE_DIR}/hello.c -O3 -o ${release_rpath}
  MAIN_DEPENDENCY hello.c
#  DEPENDS hello.c
  IMPLICIT_DEPENDS hello.c
  COMMENT "Compiling release..."
  VERBATIM)

add_custom_command(
  OUTPUT ${debug_rpath}
  COMMAND clang ${CMAKE_SOURCE_DIR}/hello.c -g -DNDEBUG -o ${debug_rpath}
  MAIN_DEPENDENCY hello.c
#  DEPENDS hello.c
  IMPLICIT_DEPENDS hello.c
  COMMENT "Compiling debug..."
  VERBATIM)


add_custom_target(hello-release ALL
  DEPENDS ${release_rpath}
  SOURCES hello.c
  VERBATIM)


add_custom_target(hello-debug ALL
  DEPENDS ${debug_rpath}
  SOURCES hello.c
  VERBATIM)

（作为编译器的调试/发布和clang是示例，我知道cmake有自己的机制。重要的细节是我有两个使用相同主输入文件的自定义命令）

执行hello-debug目标输出：

> mingw32-make hello-debug
[ 50%] Compiling release...
[100%] Compiling debug...
[100%] Built target hello-debug

为什么它还会构建发布版？

取消注释SOURCES或MAIN_DEPENDENCY选项只构建所选目标。我理解像这两个选项的文档只会影响Visual Studio项目的生成。我使用＆＃34; MinGW Makefiles＆＃34;和＃34; Visual Studio＆＃34;生成器同时，因此保持SOURCES选项实际上是好的。我还在监视某些错误？

add_custom_target SOURCES选项将依赖项添加到MAIN_DEPENDENCY自定义命令

0 个答案: