小编Qia*_*Yao的帖子

我想使用 cmake 来构建我的项目，我的 CMakeLists.txt 非常简单：

cmake_minimum_required(VERSION 3.20)

 project(YuvParallelProcess)

 message("$(PROJECT_SOURCE_DIR)")

 include_directories($(PROJECT_SOURCE_DIR)/inc)
 link_directories($(PROJECT_SOURCE_DIR)/lib/libyuv)

 add_executable(YuvParallelProcess  $(PROJECT_SOURCE_DIR)/src/main.cpp)

 target_link_libraries(YuvParallelProcess  libyuv.a)

我的项目文件的组织方式如下：

 YuvParallelProcess
                      build
                      data
                      inc
                      lib
                      src
                      CMakeLists.txt

当我cmake ..在build目录中运行时，外壳打印：

$(PROJECT_SOURCE_DIR)
-- Configuring done
CMake Error at CMakeLists.txt:10 (add_executable):
  Cannot find source file:

    $(PROJECT_SOURCE_DIR)/src/main.cpp


CMake Error at CMakeLists.txt:10 (add_executable):
  No SOURCES given to target: YuvParallelProcess

我不知道为什么 shell 只打印$(PROJECT_SOURCE_DIR)除了值之外的值PROJECT_SOURCE_DIR 如何打印值PROJECT_SOURCE_DIR 顺便说一句，我不明白为什么 cmake 无法编译我的项目