Handle ROCTX using find_path and find_library instead of Findroctx.cmake module

[jsandham]

Summary of proposed changes:

• This better handles supporting rocTX in rocSPARSE given rocTRACER does not ship a roctxConfig.cmake file and so we cannot use find_package(roctracer) from rocSPARSE.
• Previously we tried using our own custom Findroctx.cmake module file included as part of rocSPARSE, but this was deemed not appropriate going forward. See Better handle building rocSPARSE with ROC-TX #484
• Instead I have gone back to doing something similar to how MIopen and rocBLAS handle incorporating rocTX by using find_path and find_library to search for the roctracer header files and roctx shared library.

[Copilot]

Pull Request Overview

This PR replaces the custom Findroctx.cmake module with direct find_path/find_library calls to locate rocTX (roctracer) headers and library, aligning rocSPARSE with how other ROCm components integrate rocTX.

• Introduce ROCTX_PATH cache variable and use find_path/find_library in library/CMakeLists.txt
• Replace hardcoded -lroctx64 linking in tests and benchmarks with conditional linking to discovered library
• Emit clear status and warning messages when rocTX components are found or missing

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
library/CMakeLists.txt	Added ROCTX_PATH, used find_path/find_library, conditional include/link logic and messages.
clients/tests/CMakeLists.txt	Updated rocsparse-test to include/link based on found rocTX, wrapped in additional guards.
clients/benchmarks/CMakeLists.txt	Updated rocsparse-bench similarly to use discovered rocTX include and library paths.

Comments suppressed due to low confidence (4)

library/CMakeLists.txt:128

• [nitpick] Inconsistent casing in comment: change 'rocTx' to 'roctx' to match the actual library name.

      # Link the rocTx lib

library/CMakeLists.txt:100

• ROCTX_PATH is introduced here but not mentioned in the project README or CMake usage docs; consider documenting its purpose and valid values.

    set(ROCTX_PATH "" CACHE STRING "Path to the roctx library (directory containing libroctx64.so)")

clients/tests/CMakeLists.txt:428

• [nitpick] Indent this endif() to align with the opening if(NOT WIN32) for clearer structure and readability.

endif()

clients/benchmarks/CMakeLists.txt:245

• [nitpick] Indent this endif() to match its corresponding if(NOT WIN32) block for consistent formatting.

endif()

[Copilot]

Use CACHE TYPE PATH instead of STRING for ROCTX_PATH so CMake GUI tools recognize it as a filesystem path.

Suggested change

	set(ROCTX_PATH "" CACHE STRING "Path to the roctx library (directory containing libroctx64.so)")
	set(ROCTX_PATH "" CACHE PATH "Path to the roctx library (directory containing libroctx64.so)")

[Copilot]

[nitpick] The rocTX integration logic is duplicated between the tests and benchmarks; consider extracting it into a reusable CMake function or macro to reduce duplication.

[TorreZuk]

Note I thought what you had originally had was okay, but this mostly matches rocBLAS. Ruban can look but that will be next week, you probably don't want to wait. I guess if the ROCTX_PATH is set as documented then a lot of the hints are off for relative directories but that is fine if you cover most installs or fail gracefully.

rocm-cmake could have been good location for temporary common workaround too? @cgmb ? Expect too late for that.

Ignore any of my AI pair programmer review comments that don't make sense.