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)

Dockerfile

@@ -8,6 +8,7 @@ RUN chmod -R 777 /tmp
 RUN apt-get update
 RUN apt-get upgrade -y
 RUN TZ=America/Los_Angeles DEBIAN_FRONTEND=noninteractive apt-get install -y \
+    binutils-aarch64-linux-gnu \
     build-essential \
     ccache \
     clang \

aarch64-toolchain.cmake

@@ -5,3 +5,4 @@ set(CMAKE_CXX_COMPILER "/usr/bin/aarch64-linux-gnu-g++")
 set(CMAKE_FIND_ROOT_PATH /usr/aarch64-linux-gnu)
 set(CMAKE_CROSSCOMPILING_EMULATOR "qemu-aarch64;-L;/usr/aarch64-linux-gnu/")
 set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE arm64)
+set(LD_EXE /usr/aarch64-linux-gnu/bin/ld)