cmake - 当我调用git时，cmake execute_process()总是失败并带有 “No such file or directory”

Question

在Linux计算机上，从cmake项目中，我试图使用execute_process调用git，以便可以将源代码控制中的信息包含到我的应用程序中。

我创建了一个小测试来尝试打印git版本:

cmake_minimum_required (VERSION 2.8)

set (git_cmd "/usr/bin/git --version")
#set (git_cmd "ls") # returns success if you uncomment this line 
message(STATUS "git cmd: ${git_cmd}")
execute_process(COMMAND ${git_cmd}
  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
  RESULT_VARIABLE git_result
  OUTPUT_VARIABLE git_ver)

message(STATUS "git ver[${git_result}]: ${git_ver}")

configure_file (
  "${PROJECT_SOURCE_DIR}/versionInfo.h.in"
  "${PROJECT_BINARY_DIR}/versionInfo.h"
  )

运行make时，将提供以下输出:

-- git cmd: /usr/bin/git --version
-- git ver[No such file or directory]: 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/rsanderson/build/githash: 

但是，如果将命令更改为 ls，则结果有效，并且我看到目录列表已打印。我还检查了/ usr / bin中确实存在哪些git。

关于我在这里缺少什么的任何想法？

Answer 1

您必须像这样将参数作为第二个选项传递:

cmake_minimum_required (VERSION 2.8)

set (git_cmd "git")
set (git_arg "--version")
message(STATUS "git cmd: ${git_cmd}")
execute_process(COMMAND ${git_cmd} ${git_arg}
  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
  RESULT_VARIABLE git_result
  OUTPUT_VARIABLE git_ver)

message(STATUS "git ver[${git_result}]: ${git_ver}")