# Headers not found in coremodel\_v2 (2.6) when installed with library
**URL:** https://discourse.cmake.org/t/headers-not-found-in-coremodel-v2-2-6-when-installed-with-library/10591
**Category:** Code
**Created:** [April 5, 2024, 5:01pm UTC](https://discourse.cmake.org/t/headers-not-found-in-coremodel-v2-2-6-when-installed-with-library/10591 "2024-04-05T17:01:36Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@MementoRC](https://discourse.cmake.org/u/MementoRC)
#### Post date: [April 5, 2024, 5:01pm UTC](https://discourse.cmake.org/t/headers-not-found-in-coremodel-v2-2-6-when-installed-with-library/10591/1 "2024-04-05T17:01:36Z")
Using this syntax:
```auto
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
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [April 11, 2024, 4:47pm UTC](https://discourse.cmake.org/t/headers-not-found-in-coremodel-v2-2-6-when-installed-with-library/10591/2 "2024-04-11T16:47:06Z")
Could you please provide a small example project showing the problem?
Cc: @brad.king
---
### Author:  [@MementoRC](https://discourse.cmake.org/u/MementoRC)
#### Post date: [April 11, 2024, 6:39pm UTC](https://discourse.cmake.org/t/headers-not-found-in-coremodel-v2-2-6-when-installed-with-library/10591/3 "2024-04-11T18:39:31Z")
So, since then I learned a bit more about CMake syntax. Here is the project I use in my tests:
```auto
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:
```auto
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