Avoid using non-existing symbols in .map

to fix:

"ld.lld: error: version script assignment of 'UMF_1.0' to symbol
'umfLevelZeroMemoryProviderOps' failed: symbol not defined"

when using lld linker

Author: igchor

CMakeLists.txt

@@ -325,6 +325,14 @@ else()
     )
 endif()
 
+set(UMF_OPTIONAL_SYMBOLS_LINUX "")
+set(UMF_OPTIONAL_SYMBOLS_WINDOWS "")
+
+# Conditional configuration for Level Zero provider
+if(UMF_BUILD_LEVEL_ZERO_PROVIDER)
+    add_optional_symbol(umfLevelZeroMemoryProviderOps)
+endif()
+
 add_subdirectory(src)
 
 if(UMF_BUILD_TESTS)
@@ -343,17 +351,6 @@ if(UMF_BUILD_EXAMPLES)
     endif()
 endif()
 
-# Conditional configuration for Level Zero provider
-if(UMF_BUILD_LEVEL_ZERO_PROVIDER)
-    set(OPTIONAL_SYMBOLS "umfLevelZeroMemoryProviderOps")
-else()
-    set(OPTIONAL_SYMBOLS "")
-endif()
-
-# Configure the DEF file based on whether Level Zero provider is built
-configure_file("${CMAKE_CURRENT_SOURCE_DIR}/src/libumf.def.in"
-               "${CMAKE_CURRENT_BINARY_DIR}/src/libumf.def" @ONLY)
-
 if(UMF_FORMAT_CODE_STYLE)
     find_program(CLANG_FORMAT NAMES clang-format-15 clang-format-15.0
                                     clang-format)

cmake/helpers.cmake

@@ -417,3 +417,12 @@ macro(add_sanitizer_flag flag)
 
     set(CMAKE_REQUIRED_FLAGS ${SAVED_CMAKE_REQUIRED_FLAGS})
 endmacro()
+
+function(add_optional_symbol symbol)
+    set(UMF_OPTIONAL_SYMBOLS_WINDOWS
+        "${UMF_OPTIONAL_SYMBOLS_WINDOWS} \n    ${symbol}"
+        PARENT_SCOPE)
+    set(UMF_OPTIONAL_SYMBOLS_LINUX
+        "${UMF_OPTIONAL_SYMBOLS_LINUX} \n    ${symbol};"
+        PARENT_SCOPE)
+endfunction()

src/CMakeLists.txt

@@ -112,8 +112,27 @@ if(NOT UMF_DISABLE_HWLOC)
         provider/provider_os_memory_windows.c)
 
     set(UMF_LIBS ${UMF_LIBS} ${LIBHWLOC_LIBRARIES})
+
+    add_optional_symbol(umfMemspaceCreateFromNumaArray)
+    add_optional_symbol(umfMemspaceHighestBandwidthGet)
+    add_optional_symbol(umfMemspaceHighestCapacityGet)
+    add_optional_symbol(umfMemspaceHostAllGet)
+    add_optional_symbol(umfMemspaceLowestLatencyGet)
+endif()
+
+if(WINDOWS)
+    message(STATUS "UMF_OPTIONAL_SYMBOLS: ${UMF_OPTIONAL_SYMBOLS_WINDOWS}")
+else()
+    message(STATUS "UMF_OPTIONAL_SYMBOLS: ${UMF_OPTIONAL_SYMBOLS_LINUX}")
 endif()
 
+# Configure the DEF file based on whether Level Zero provider is built
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/libumf.def.in"
+               "${CMAKE_CURRENT_BINARY_DIR}/libumf.def" @ONLY)
+
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/libumf.map.in"
+               "${CMAKE_CURRENT_BINARY_DIR}/libumf.map" @ONLY)
+
 set(UMF_PRIVATE_LIBRARY_DIRS ${UMF_PRIVATE_LIBRARY_DIRS}
                              ${LIBHWLOC_LIBRARY_DIRS})
 
@@ -140,7 +159,7 @@ if(UMF_BUILD_SHARED_LIBRARY)
         TYPE SHARED
         SRCS ${UMF_SOURCES}
         LIBS ${UMF_LIBS} ${HWLOC_LIB}
-        LINUX_MAP_FILE ${CMAKE_CURRENT_SOURCE_DIR}/libumf.map
+        LINUX_MAP_FILE ${CMAKE_CURRENT_BINARY_DIR}/libumf.map
         WINDOWS_DEF_FILE ${CMAKE_CURRENT_BINARY_DIR}/libumf.def)
     set(UMF_COMMON_COMPILE_DEFINITIONS ${UMF_COMMON_COMPILE_DEFINITIONS}
                                        "UMF_SHARED_LIBRARY")

src/libumf.def.in

@@ -62,4 +62,4 @@ EXPORTS
     umfProxyPoolOps
     umfPutIPCHandle
     umfScalablePoolOps
-    @OPTIONAL_SYMBOLS@
+    @UMF_OPTIONAL_SYMBOLS_WINDOWS@

src/libumf.map renamed to src/libumf.map.in

@@ -11,7 +11,6 @@ UMF_1.0 {
         umfFree;
         umfGetIPCHandle;
         umfGetLastFailedMemoryProvider;
-        umfLevelZeroMemoryProviderOps;
         umfMemoryTrackerGetAllocInfo;
         umfMemoryProviderAlloc;
         umfMemoryProviderAllocationMerge;
@@ -35,14 +34,9 @@ UMF_1.0 {
         umfMempolicyDestroy;
         umfMempolicySetCustomSplitPartitions;
         umfMempolicySetInterleavePartSize;
-        umfMemspaceCreateFromNumaArray;
         umfMemspaceDestroy;
         umfMemspaceMemtargetNum;
         umfMemspaceMemtargetGet;
-        umfMemspaceHighestBandwidthGet;
-        umfMemspaceHighestCapacityGet;
-        umfMemspaceHostAllGet;
-        umfMemspaceLowestLatencyGet;
         umfMemtargetGetType;
         umfOpenIPCHandle;
         umfOsMemoryProviderOps;
@@ -62,6 +56,7 @@ UMF_1.0 {
         umfProxyPoolOps;
         umfPutIPCHandle;
         umfScalablePoolOps;
+        @UMF_OPTIONAL_SYMBOLS_LINUX@
     local:
         *;
 };