使用CMake在主项目之前强制构建外部项目（使用buildtools） [英] Force building external project (with buildtools) before main project with CMake

问题描述

我想在开始构建主项目之前先构建gsl。我在根 CMakeLists.txt 文件中添加了以下几行。

I want to build gsl before I start building my main project. I added following lines to root CMakeLists.txt file.

cmake_minimum_required(VERSION 2.8)
project(moose)
include(CheckIncludeFiles)
include(ExternalProject)
# Use local gsl
ExternalProject_Add(gsl_local
    URL ${CMAKE_CURRENT_SOURCE_DIR}/external/gsl/gsl-1.16.tar.gz
    PREFIX ${CMAKE_CURRENT_SOURCE_DIR}/gsl
    CONFIGURE_COMMAND ./../gsl_local/configure --prefix=${CMAKE_CURRENT_SOURCE_DIR}/gsl
    BUILD_COMMAND make
    INSTALL_COMMAND ""
    )

麻烦的是首先不构建gsl，而是继续构建项目 moose ，该项目需要 gsl / gsl.h 。它失败是因为 gsl / gsl.h 不在正确的位置。如何在开始构建主项目之前强制CMake构建外部项目。

The trouble is that it does not build gsl first but goes on to build project moose which requires gsl/gsl.h. It fails because gsl/gsl.h is not in proper place. How to force CMake to build external project before it starts building main project.

推荐答案

使用add_library / add_executable定义主库/可执行文件后，请使用<$将gsl_local设置为项目的依赖项c $ c> add_dependencies 命令（ link ）。

After you define your main library/executable with add_library/add_executable, set gsl_local as a dependency of your project using the add_dependencies command (link).

add_dependencies(moosebin gsl_local)

请注意， moosebin是您使用 add_library 或<$ c $创建的目标的名称。 c> add_executable ，不一定与您使用 project（）定义的内容相同。

Note that "moosebin" here is the name of the target you create with add_library or add_executable, which is not necessarily the same as what you define with project().

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