[refactor]: cmake library installation

[1a1a11a]

I am in the process of re-enabling the plugin system and noticed that the current library installation does not work. So this PR tries to fix the library installation.
Previously, we compiled each folder as a static library and installed all of them; however, we do not have a combined library. In this PR, each subfolder is compiled into an object, and we will install one library for libCacheSim. Currently we install both static and shared library.

[haochengxia]

Should we use an option to determine building the shared lib or not?

[1a1a11a]

Should we use an option to determine building the shared lib or not?

Sounds good!

[1a1a11a]

updated

[Copilot]

Pull Request Overview

This PR refactors the CMake build to produce a unified libCacheSim static (and optional shared) library by compiling submodules as OBJECT libraries and updating the library installation.

• Converted each module (cache, traceReader, profiler, etc.) into OBJECT libraries and removed individual installations.
• Added a combined static libCacheSim target (with optional shared variant) including proper target_include_directories, linking, and installation rules.
• Updated the request_t struct to nest key_size/val_size inside a kv sub-struct and adjusted relevant trace reader code.

Reviewed Changes

Copilot reviewed 15 out of 23 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/CMakeLists.txt	Switched test executables to link against ${PROJECT_NAME} and added manual include paths.
libCacheSim/utils/CMakeLists.txt	Converted utils_lib to an OBJECT library.
libCacheSim/traceReader/*.h	Updated request_t field references from req->key_size to req->kv.key_size.
libCacheSim/traceReader/CMakeLists.txt	Converted traceReader_lib to an OBJECT library.
libCacheSim/traceAnalyzer/reuse.h	Removed vtime_granularity_ member and its constructor parameter.
libCacheSim/traceAnalyzer/CMakeLists.txt	Converted traceAnalyzer_lib to an OBJECT library and adjusted linking.
libCacheSim/profiler/CMakeLists.txt	Converted profiler_lib to an OBJECT library.
libCacheSim/mrcProfiler/CMakeLists.txt	Converted mrcProfiler_lib to an OBJECT library.
libCacheSim/include/libCacheSim/request.h	Wrapped bitfields key_size/val_size in a kv struct.
libCacheSim/dataStructure/CMakeLists.txt	Converted dataStructure_lib to an OBJECT library.
libCacheSim/cache/CMakeLists.txt	Converted cache_lib_c/cache_lib_cpp to OBJECT libraries.
CMakeLists.txt	Enabled CMAKE_POSITION_INDEPENDENT_CODE, added BUILD_SHARED_LIBS, centralized dependencies into ${PROJECT_NAME} static/shared library, and updated installation rules.

Comments suppressed due to low confidence (3)

libCacheSim/include/libCacheSim/request.h:49

• The request_t struct now nests key_size and val_size inside kv, which breaks existing code references (e.g., in print_request). Ensure all accesses (including in print_request and any other modules) are updated to use req->kv.key_size and consider providing helper accessors if needed for clarity.

  } kv;

test/CMakeLists.txt:28

• [nitpick] Since the ${PROJECT_NAME} target exports INTERFACE include directories, you can remove or reduce these manual target_include_directories entries and rely on the imported interface includes. This centralizes include paths and reduces duplication.

        ${CMAKE_SOURCE_DIR}/libCacheSim  # Add source dir to find utils/include/mymath.h

CMakeLists.txt:283

• The install() call for the static libCacheSim target includes a LIBRARY DESTINATION, which only applies to shared libraries. You can drop the LIBRARY DESTINATION for this static-only install and keep only ARCHIVE DESTINATION to avoid confusion.

    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}