Fix CMake configuration for slick-shm dependency: allow installation, remove obsolete precompiled headers, and ensure proper handling in export targets

Author: kzhdev

CHANGELOG

@@ -11,6 +11,10 @@
   - All 22 tests pass (100% success rate)
   - No changes to public API - fully backward compatible at API level
   - Binary compatibility break: shared memory segments from previous versions are incompatible
+- Fixed CMake configuration to properly handle slick-shm dependency in export targets
+  - Removed `SLICK_SHM_INSTALL OFF` to allow slick-shm installation when fetched
+  - Added `find_dependency(slick-shm REQUIRED)` in slick-queueConfig.cmake.in
+  - Removed obsolete platform-specific precompiled headers (windows.h, sys/mman.h, etc.)
 
 # v1.2.3 - 2026-01-29
 - Initialize reserved counters for local and shared-memory queues

CMakeLists.txt

@@ -15,10 +15,9 @@ find_package(slick-shm CONFIG QUIET)
 if (NOT slick-shm_FOUND)
     include(FetchContent)
 
-    # Disable slick-shm tests and examples
+    # Disable slick-shm tests and examples, but allow installation
     set(SLICK_SHM_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
     set(SLICK_SHM_BUILD_TESTS OFF CACHE BOOL "" FORCE)
-    set(SLICK_SHM_INSTALL OFF CACHE BOOL "" FORCE)
     FetchContent_Declare(
         slick-shm
         GIT_REPOSITORY https://github.com/SlickQuant/slick-shm.git
@@ -59,20 +58,6 @@ target_precompile_headers(slick-queue INTERFACE
     <new>
 )
 
-if (WIN32)
-    target_precompile_headers(slick-queue INTERFACE 
-        <windows.h>
-        <tchar.h>
-    )
-else()
-    target_precompile_headers(slick-queue INTERFACE 
-        <sys/mman.h>
-        <sys/stat.h>
-        <fcntl.h>
-        <unistd.h>
-        <cerrno>
-    )
-endif()
 
 if(BUILD_SLICK_QUEUE_TESTS)
     enable_testing()

cmake/slick-queueConfig.cmake.in

@@ -1,5 +1,9 @@
 @PACKAGE_INIT@
 
+# Find slick-shm dependency
+include(CMakeFindDependencyMacro)
+find_dependency(slick-shm REQUIRED)
+
 include("${CMAKE_CURRENT_LIST_DIR}/slick-queueTargets.cmake")
 
 if(NOT TARGET slick::slick-queue AND TARGET slick::queue)