如何编写 CMakeLists.txt 来构建一些源代码及其示例代码？

Question

有几个 C++ 源代码不使用 CMake 作为构建系统。假设我有这样一个文件结构：

ProjectRepoDir
  |- include
     |- liba.h
     |- module1.h
  |- src
     |- main.cpp
     |- liba.cpp
     |- module1.cpp
  |- samples
     |- example1-dir
        |- main.cpp
     |- example2-dir
        |- main.cpp

我可以在ProjectRepoDir 下创建一个 CMakeLists.txt，并在该目录中执行这些命令来构建源代码和所有示例目录吗？原因是我不想在每个samples目录下都写CMakeLists.txt。

mkdir build && cd build
cmake ..
make

Answer 1

当然，您可以从顶级 CMakeLists.txt 执行所有操作：

# Extract the common parts in a (internal) static library
add_library(liba STATIC src/liba.cpp src/module1.cpp)
target_include_directories(liba PUBLIC include)

add_executable(my-project src/main.cpp)
target_link_libraries(my-project liba)

# Add a `samples` target that enables building the sample programs
# Not built by default.
add_executable(sample1 EXCLUDE_FROM_ALL samples/example1-dir/main.cpp)
target_link_libraries(sample1 liba)

add_executable(sample2 EXCLUDE_FROM_ALL samples/example2-dir/main.cpp)
target_link_libraries(sample2 liba)

add_custom_target(samples DEPENDS sample1 sample2)