Add searching for hwloc in CMake

Fixes: #252

Signed-off-by: Lukasz Dorau <[email protected]>

Author: ldorau

.github/workflows/pr_push.yml

@@ -78,6 +78,7 @@ jobs:
           cmake
           -B ${{github.workspace}}/build
           -DUMF_FORMAT_CODE_STYLE=ON
+          -DUMF_BUILD_OS_MEMORY_PROVIDER=OFF
 
       - name: Build
         run: >

CMakeLists.txt

@@ -42,6 +42,7 @@ endforeach()
 include(CTest)
 include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
+find_package(PkgConfig)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 include(helpers)

cmake/FindLIBHWLOC.cmake

@@ -0,0 +1,19 @@
+# Copyright (C) 2024 Intel Corporation
+# Under the Apache License v2.0 with LLVM Exceptions. See LICENSE.TXT.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+message(STATUS "Checking for module 'libhwloc' using find_library()")
+
+find_library(LIBHWLOC_LIBRARY NAMES libhwloc hwloc)
+set(LIBHWLOC_LIBRARIES ${LIBHWLOC_LIBRARY})
+
+if(LIBHWLOC_LIBRARY)
+	message(STATUS "  Found libhwloc using find_library()")
+else()
+	set(MSG_NOT_FOUND "libhwloc NOT found (set CMAKE_PREFIX_PATH to point the location)")
+	if(LIBHWLOC_FIND_REQUIRED)
+		message(FATAL_ERROR ${MSG_NOT_FOUND})
+	else()
+		message(WARNING ${MSG_NOT_FOUND})
+	endif()
+endif()

src/CMakeLists.txt

@@ -58,8 +58,15 @@ if(UMF_BUILD_OS_MEMORY_PROVIDER)
         provider/provider_os_memory_linux.c
         memory_targets/memory_target_numa.c
         memspaces/memspace_numa.c)
+
     if(LINUX)
-        set(UMF_LIBS ${UMF_LIBS} hwloc)
+        if(PkgConfig_FOUND)
+            pkg_check_modules(LIBHWLOC hwloc)
+        endif()
+        if(NOT LIBHWLOC_FOUND)
+            find_package(LIBHWLOC REQUIRED hwloc)
+        endif()
+        set(UMF_LIBS ${UMF_LIBS} ${LIBHWLOC_LIBRARIES})
     endif()
 endif()