Try to fix cross-compile build

CMakeLists.txt

@@ -95,9 +95,12 @@ target_compile_options(${PROJECT_NAME}-object PRIVATE -fno-exceptions
                                                       -fvisibility=hidden)
 target_include_directories(${PROJECT_NAME}-object
                            PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include)
+if(NOT LD_EXE)
+  set(LD_EXE ld)
+endif()
 add_custom_command(
   OUTPUT ${CMAKE_BINARY_DIR}/${PROJECT_NAME}.o
-  COMMAND ld -r $<TARGET_OBJECTS:${PROJECT_NAME}-object> -o
+  COMMAND ${LD_EXE} -r $<TARGET_OBJECTS:${PROJECT_NAME}-object> -o
           ${CMAKE_BINARY_DIR}/${PROJECT_NAME}.o
   DEPENDS $<TARGET_OBJECTS:${PROJECT_NAME}-object>
   COMMAND_EXPAND_LISTS)