[CMake Build] Install necessary header files only?

[ThomsonTan]

Follow up for #1932 (comment)

we install all headers when we run cmake --install now.In my understanding, is it better to select a subset of headers to install(all exported classes and their dependencies). Maybe we can also improve it in another PR.

For cmake, we install header files as below, @owent, do you think we should list the files to install explicitly instead of relying on pattern with wildcard?

opentelemetry-cpp/api/CMakeLists.txt

Lines 24 to 29 in 6f0a30e

	install(
	DIRECTORY include/opentelemetry
	DESTINATION include
	FILES_MATCHING
	PATTERN "*.h"
	PATTERN "metrics" EXCLUDE)

[lalitb]

For API - need to install all headers
For SDK - need to check the public facing headers, and install accordingly.

PATTERN "metrics" EXCLUDE - Metrics header needn't be excluded.

[owent]

Or can we add install() in CMakeLists.txt of each target?
For example in sdk/src/common/CMakeLists.txt:

 install( 
   DIRECTORY ${PROJECT_SOURCE_DIR}/sdk/include/opentelemetry/sdk/common
   DESTINATION include/opentelemetry/sdk/) 

[lalitb]

Or can we add install() in CMakeLists.txt of each target?

Agree, that would be better approach.

[github-actions]

This issue was marked as stale due to lack of activity.