CMake 是否总是为所有可能的项目配置生成配置?

2021-12-26 00:00:00 configuration cmake c++ projects-and-solutions

我有调试和发布选项的特定配置(MSVC 和 GCC 不同).假设我们通过 cmake .. 生成默认项目.CMake 是否总是为所有可能的项目配置(调试和发布)生成配置，还是总是只获得一组配置选项?

I have specific configuration for debug and release options (diferent for MSVC and for GCC). Say we generate default project via cmake ... Does CMake always generate configurations for all possible project configurations (Debug and Release) or one always gets only one set of comfiguration options?

推荐答案

正如@cplusplusrat 所评论的，这取决于生成器/构建环境:

As @cplusplusrat has commented, this depends on the generator/build environment:

  • 对于 MSVC 或 XCode 等多配置环境，是的.
  • 对于 GCC 等单一配置环境，否.

单配置环境的默认设置既不是 Debug 也不是 Release(参见 此处 或 此处).

And the default for single-configuration environments is neither Debug nor Release (see here or here).

所以我一直定义一个CMAKE_BUILD_TYPE 用于单配置环境作为默认值.你也可以这样做，例如在调用 CMake 的构建脚本中:

So I have always defined one CMAKE_BUILD_TYPE for single-configuration environments as a default. You could also do this e.g. in build scripts calling CMake:

mingw_build.cmd

@ECHO off
SETLOCAL ENABLEDELAYEDEXPANSION
:: usage:
::          mingw_build.cmd <target> <config>
::                  <target> - target to be built (default: all)
::                  <config> - configuration to be used for build (default: Debug)

if NOT "%1" == "" (set CMAKE_TARGET=%1) else (set CMAKE_TARGET=all)
if NOT "%2" == "" (set CMAKE_BUILD_TYPE=%2) else (set CMAKE_BUILD_TYPE=Debug)
SET CMAKE_BINARY_DIR=%CMAKE_BUILD_TYPE%

IF NOT EXIST "%CMAKE_BINARY_DIR%Makefile" (
    cmake -H"." -B"%CMAKE_BINARY_DIR%" -DCMAKE_BUILD_TYPE=%CMAKE_BUILD_TYPE% -G"MinGW Makefiles"
)
cmake --build %CMAKE_BINARY_DIR% --target %CMAKE_TARGET%

ENDLOCAL

vs_x64_build.cmd

@ECHO off
SETLOCAL ENABLEDELAYEDEXPANSION
:: usage:
::          vs_x64_build.cmd <target> <config>
::                  <target> - target to be built (default: ALL_BUILD)
::                  <config> - configuration to be used for build (default: Debug)

if NOT "%1" == "" (SET CMAKE_TARGET=%1) else (SET CMAKE_TARGET=ALL_BUILD)
if NOT "%2" == "" (set CMAKE_BUILD_TYPE=%2) else (set CMAKE_BUILD_TYPE=Debug)
SET CMAKE_BINARY_DIR=x64

IF NOT EXIST "%CMAKE_BINARY_DIR%*.sln" (
    cmake -H"." -B"%CMAKE_BINARY_DIR%" -G"Visual Studio 14 2015 Win64"
)
cmake --build "%CMAKE_BINARY_DIR%" --target "%CMAKE_TARGET%" --config "%CMAKE_BUILD_TYPE%"

ENDLOCAL

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