[cdglove]

When file(GLOB ... CONFIGURE_DEPENDS) or file(GLOB_RECURSE ... CONFIGURE_DEPENDS) is evaluated, CMake's make style generators create a verification script (VerifyGlobs.cmake) that gets run on every build, outputting "Re-checking globbed directories....". This can cause a a noticeable delay on incremental builds.

Since the headers are only needed for IDE project navigation, limiting this check to that use case is a good compromise.

[sehe]

I asked a question about the validity of the reasoning here boostorg/assert#49 (comment)

[cmazakas]

@cdglove I don't understand how this is a problem. Are you using Boost as a subdirectory? Try cmake --install and then find_package().

[cdglove]

I'm using it like this:

FetchContent_Declare(
  Boost
  SYSTEM 
  OVERRIDE_FIND_PACKAGE 
  EXCLUDE_FROM_ALL
  URL https://github.com/boostorg/boost/releases/download/boost-1.92.0/boost-1.92.0-cmake.tar.xz
  URL_HASH MD5=542f895860ceb7a99c9aa4d02f6073c8
  DOWNLOAD_EXTRACT_TIMESTAMP True)

FetchContent_MakeAvailable(Boost)

And consuming it like this:

target_link_libraries(mytarget
  PUBLIC 
    Boost::describe
    Boost::stl_interfaces 
    Boost::serialization 
    Boost::filesystem 
  PRIVATE 
    Boost::nowide
)

When one does this, it re-runs every GLOB in every file whether the library is being consumed or not.

See my related post on the mailing list:
https://lists.boost.org/archives/list/boost@lists.boost.org/thread/LKPFNC3AMPIVWRAE75EFMYRMS6AL6MV4/

[cdglove]

Updated as per discussion on the mailing list and integrated into the assert library.

https://lists.boost.org/archives/list/boost@lists.boost.org/thread/LKPFNC3AMPIVWRAE75EFMYRMS6AL6MV4/

boostorg/assert#49