摘要

Question

在Win7上使用cmake版本3.7.0-rc3，我可以使用ExternalProject_Add_Step运行以下代码没问题。但是在Ubuntu16上使用cmake版本3.7.0，我收到错误：

add_custom_command given APPEND option with output "ExternalProjects/Stamp/boost/boost-CONFIGURE" which is not already a custom command output.

这是重现问题的简化代码。

ExternalProject_Add(
    boost
    URL https://sourceforge.net/projects/boost/files/boost/1.62.0/boost_1_62_0.tar.gz/download
    URL_HASH MD5=6f4571e7c5a66ccc3323da6c24be8f05
    CONFIGURE_COMMAND ""
    BUILD_COMMAND ""
    INSTALL_COMMAND ""
)

ExternalProject_Add_Step(
    boost UNIX_CONFIGURE DEPENDEES DOWNLOAD DEPENDERS CONFIGURE
    WORKING_DIRECTORY "<SOURCE_DIR>" COMMAND ./bootstrap.sh
)

罪魁祸首似乎是DEPENDERS CONFIGURE。如果我把它拿出来，那就行了。但是......我希望能够指定步骤CONFIGURE依赖于此自定义步骤，而在Windows上我可以，但在Ubuntu上我无法做到。有什么想法吗？

Answer 1

我没有在documentation中看到它，但您只是遇到了一个区分大小写的问题。将您的CMakeLists.txt修改为：

❯ cat ../CMakeLists.txt 
cmake_minimum_required(VERSION 3.7)
include(ExternalProject)
ExternalProject_Add(
    boost
    URL https://sourceforge.net/projects/boost/files/boost/1.62.0/boost_1_62_0.tar.gz/download
    URL_HASH MD5=6f4571e7c5a66ccc3323da6c24be8f05
    CONFIGURE_COMMAND ""
    BUILD_COMMAND ""
    INSTALL_COMMAND ""
    )

ExternalProject_Add_Step(
    boost UNIX_CONFIGURE DEPENDEES download DEPENDERS configure
    WORKING_DIRECTORY "boost-prefix/src/boost/" COMMAND ./bootstrap.sh
    )

请注意＆＃34;下载＆＃34;和＆＃34;配置＆＃34; ExternalProject_Add_Step()中的❯ cmake .. -- The C compiler identification is AppleClang 8.0.0.8000042 -- The CXX compiler identification is AppleClang 8.0.0.8000042 -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done -- Generating done -- Build files have been written to: /Users/nega/foo/build ❯ make Scanning dependencies of target boost [ 11%] Creating directories for 'boost' [ 22%] Performing download step (download, verify and extract) for 'boost' -- verifying file... file='/Users/nega/foo/build/boost-prefix/src/boost_1_62_0.tar.gz' -- File already exists and hash match (skip download): file='/Users/nega/foo/build/boost-prefix/src/boost_1_62_0.tar.gz' MD5='6f4571e7c5a66ccc3323da6c24be8f05' -- extracting... src='/Users/nega/foo/build/boost-prefix/src/boost_1_62_0.tar.gz' dst='/Users/nega/foo/build/boost-prefix/src/boost' -- extracting... [tar xfz] -- extracting... [analysis] -- extracting... [rename] -- extracting... [clean up] -- extracting... done [ 33%] Performing UNIX_CONFIGURE step for 'boost' Building Boost.Build engine with toolset darwin... tools/build/src/engine/bin.macosxx86_64/b2 Detecting Python version... 2.7 Detecting Python root... /Users/nega/i3/virtenv Unicode/ICU support for Boost.Regex?... not found. Generating Boost.Build configuration in project-config.jam... Bootstrapping is done. To build, run: ./b2 To adjust configuration, edit 'project-config.jam'. Further information: - Command line help: ./b2 --help - Getting started guide: http://www.boost.org/more/getting_started/unix-variants.html - Boost.Build documentation: http://www.boost.org/build/doc/html/index.html [ 44%] No update step for 'boost' [ 55%] No patch step for 'boost' [ 66%] No configure step for 'boost' [ 77%] No build step for 'boost' [ 88%] No install step for 'boost' [100%] Completed 'boost' [100%] Built target boost现在已经落后了。现在，cmake并成功完成。

boost-prefix/src/boost-stamp

现在，查看构建目录的❯ v boost-prefix/src/boost-stamp total 32 drwxr-xr-x 15 nega staff 510 Dec 20 12:29 ./ drwxr-xr-x 6 nega staff 204 Dec 20 12:28 ../ -rw-r--r-- 1 nega staff 0 Dec 20 12:29 boost-UNIX_CONFIGURE -rw-r--r-- 1 nega staff 0 Dec 20 12:29 boost-build -rw-r--r-- 1 nega staff 0 Dec 20 12:29 boost-configure -rw-r--r-- 1 nega staff 0 Dec 20 12:29 boost-done -rw-r--r-- 1 nega staff 0 Dec 20 12:28 boost-download -rw-r--r-- 1 nega staff 0 Dec 20 12:29 boost-install -rw-r--r-- 1 nega staff 0 Dec 20 12:28 boost-mkdir -rw-r--r-- 1 nega staff 0 Dec 20 12:29 boost-patch -rw-r--r-- 1 nega staff 0 Dec 20 12:29 boost-update -rw-r--r-- 1 nega staff 173 Dec 20 12:18 boost-urlinfo.txt -rw-r--r-- 1 nega staff 4424 Dec 20 12:18 download-boost.cmake -rw-r--r-- 1 nega staff 1611 Dec 20 12:28 extract-boost.cmake -rw-r--r-- 1 nega staff 0 Dec 20 12:28 verify-boost.cmake：

❯ grep -i unix ../CMakeLists.txt 
    boost uNiX_CoNFiGuRe DEPENDEES download DEPENDERS configure
❯ make | grep -i unix
[ 33%] Performing uNiX_CoNFiGuRe step for 'boost'
❯ find boost-prefix/src/boost-stamp | grep -i unix
boost-prefix/src/boost-stamp/boost-uNiX_CoNFiGuRe

你会注意到每一步都有一个＆＃34;文件标记＆＃34;以它命名。默认步骤全部为小写，您的自定义步骤＆＃34; UNIX_CONFIGURE＆＃34;是大写的，就像你定义它一样。如果您将自定义步骤与大小写混合，则可以将其作为输出。

make

另外，请查看[ 22%] Performing download step (download, verify and extract) for 'boost' [....] [ 33%] Performing uNiX_CoNFiGuRe step for 'boost' [....] [ 44%] No update step for 'boost' [ 55%] No patch step for 'boost' [ 66%] No configure step for 'boost' [ 77%] No build step for 'boost' [ 88%] No install step for 'boost' [100%] Completed 'boost' [100%] Built target boost输出。

ExternalProject

所有默认步骤均以小写形式引用。

摘要

在CMake的{{1}}模块中，请参阅小写的默认步骤。

ExternalProject_Add_Step ERROR add_custom_command给定APPEND选项和输出

1 个答案:

摘要