What is the minimal number of submodules to compile boost::regex with cmake + ExternalProject?

Question

I need to compile boost from sources, it is a requirement. But I only need one library regex for a benchmark.

I have success if I clone the entire boost project with the snippet below. However downloading the entire boost every time is very expensive for the type of usage we have in mind.

However when I uncomment the line # GIT_SUBMODULES I get many errors, in particular complaining about boost-install.jam not existing.

ExternalProject_Add(
    libboost
    GIT_REPOSITORY "https://github.com/boostorg/boost.git"
    # GIT_SUBMODULES tools/build tools/bcp libs/regex libs/config tools/boostdep libs/predef libs/core  libs/detail  libs/io libs/iterator libs/predef libs/preprocessor  libs/smart_ptr libs/throw_exception libs/system libs/filesystem  libs/integer tools/build tools/bcp 
    GIT_SHALLOW ON
    GIT_SUBMODULES_RECURSE OFF
    BUILD_IN_SOURCE ON
    PREFIX ${CMAKE_CURRENT_SOURCE_DIR}
    SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/boost
    TMP_DIR ${PROJECT_BINARY_DIR}/boost-tmp
    STAMP_DIR ${PROJECT_BINARY_DIR}/boost-stamp
    #BINARY_DIR ${PROJECT_BINARY_DIR}/boost-build
    DOWNLOAD_DIR ${PROJECT_BINARY_DIR}/boost-down
    CONFIGURE_COMMAND 
        cd ${CMAKE_CURRENT_SOURCE_DIR}/boost &&
        ./bootstrap.sh 
        --with-toolset=clang 
    BUILD_COMMAND 
        cd ${CMAKE_CURRENT_SOURCE_DIR}/boost &&
        ./b2 headers &&
        ./b2 install -q  
        --prefix=${CMAKE_CURRENT_SOURCE_DIR}/local 
        --build-type=minimal  
        --layout=system 
        --disable-icu
        --with-regex 
        --with-system 
        variant=release link=static runtime-link=static 
        threading=single address-model=64 architecture=x86 
        toolset=clang
    INSTALL_COMMAND ""
)

So the question is: what is the minimal number of submodules that I need to download/clone in order to make boost::regex available?

Thank you for your help!

[6/54] Performing build step for 'libboost'
FAILED: boost-stamp/libboost-build /home/hbucher/git/regex-performance/build/boost-stamp/libboost-build 
cd /home/hbucher/git/regex-performance/vendor/boost && cd /home/hbucher/git/regex-performance/vendor/boost && ./b2 headers && ./b2 install -q --prefix=/home/hbucher/git/regex-performance/vendor/local --build-type=minimal --layout=system --disable-icu --with-regex variant=release link=static runtime-link=static threading=single address-model=64 architecture=x86 toolset=clang && /usr/local/bin/cmake -E touch /home/hbucher/git/regex-performance/build/boost-stamp/libboost-build
[errno 2] boost-install.jam (No such file or directory)
Jamroot:308: in boost-install
ERROR: rule "boost-install.boost-install" unknown in module "Jamfile</home/hbucher/git/regex-performance/vendor/boost>".
libs/filesystem/build/Jamfile.v2:171: in modules.load

What is the minimal number of submodules to compile boost::regex with cmake + ExternalProject?

0 Answers0