Headers not found in coremodel_v2 (2.6) when installed with library

Code
1

Using this syntax:

install(TARGETS _core_lib
    LIBRARY DESTINATION lib
    FILE_SET HEADERS DESTINATION include
)

The headers in the FILE_SET are installed correctly, however they do not appear in the coremodel_v2 (2.6) reply

The intent is to use a large third-party project (multiple libraries with various headers) and reconstruct the artifacts from a subset of targets
The artifacts are found, but not their respective headers

2

Could you please provide a small example project showing the problem?

Cc: @brad.king

3

So, since then I learned a bit more about CMake syntax. Here is the project I use in my tests:

cmake_minimum_required(VERSION 3.28)
project(sckit_build_core_plugin LANGUAGES C)

add_executable(_core src/example.c)
add_library(_library STATIC src/example_lib.c)
target_sources(_library PUBLIC FILE_SET HEADERS BASE_DIRS include FILES include/example1.h include/example2.h)

install(TARGETS _core RUNTIME DESTINATION bin)
install(TARGETS _library
    ARCHIVE DESTINATION lib
    FILE_SET HEADERS DESTINATION include
)

I anticipated that the coremodel_v2 would list 2 targets (it does) and that the HEADERS fileset would be listed in the _library target, as per the definition of the target in the CMakeLists.txt, they are not, in fact example?.h are not found in the coremodel_v2, at all

The end goal was to identify the targets in a external project and configure which targets I wanted installed … right, this is not a thing I discovered, CMake does not install targets, please correct me.

So since then I moved onto defining COMPONENTS, which can be independently installed, but not all projects will associate their TARGETS with COMPONENTS, and if I only build part of the TARGETS, CMake will fail trying to install the non-built TARGETS.

I guess, I segway’d into my real problem as a ‘bonus’ question - though it is normal that the HEADERS are not found in the coremodel_v2?

For completeness, the rest of the test that selects TARGETS & COMPONENTS:

cmake_minimum_required(VERSION 3.28)
project(sckit_build_core_plugin LANGUAGES C)

add_executable(_core src/example.c)
add_library(_library STATIC src/example_lib.c)
target_sources(_library PUBLIC FILE_SET HEADERS BASE_DIRS include FILES include/example1.h include/example2.h)

install(TARGETS _core RUNTIME DESTINATION bin COMPONENT executables)
install(TARGETS _library
    ARCHIVE DESTINATION lib
    COMPONENT libraries
    FILE_SET HEADERS DESTINATION include
    COMPONENT headers
)

So, I also discovered the directory-... dataset. So, I first discover the TARGETS, build the ones I want, then look in the directory-... which COMPONENTS they belong to and if I find one Unspecified, then I rebuild all the targets and install all, because I would not know how the project intended to build/install the TARGETS. Hope this is not too confusing
Thank you