undefined reference to 'FreeLibraryAndExitThread'

[nxbear]

Hello.

I'm trying to use the FreeLibraryAndExitThread function for detaching a profiler from CLR.
so I've build a coreclr and link my profiler with 'libcoreclrpal.a' library.

But when I try to build my profiler, linker outputs error like this

/usr/bin/ld: /tmp/MODProfiler-7b0549.o: in function `MODProfiler::InitializeForAttach(IUnknown*, void*, unsigned int)':
MODProfiler.cpp:(.text+0xf48): undefined reference to `FreeLibraryAndExitThread'
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Is there any manual about how to link with coreclr static library for profiler?
I don't know what cause of this error.

this is my build.sh file

#!/bin/sh

[ -z "${CORECLR_PATH:-}" ] && CORECLR_PATH=~/coreclr
[ -z "${BuildOS:-}"      ] && BuildOS=Linux
[ -z "${BuildArch:-}"    ] && BuildArch=x64
[ -z "${BuildType:-}"    ] && BuildType=Debug
[ -z "${Output:-}"       ] && Output=CorProfiler.so

printf '  CORECLR_PATH : %s\n' "$CORECLR_PATH"
printf '  BuildOS      : %s\n' "$BuildOS"
printf '  BuildArch    : %s\n' "$BuildArch"
printf '  BuildType    : %s\n' "$BuildType"

printf '  Building %s ... ' "$Output"

CXX_FLAGS="$CXX_FLAGS --no-undefined -Wno-invalid-noreturn -fPIC -fms-extensions -DBIT64 -DPAL_STDCPP_COMPAT -DPLATFORM_UNIX -std=c++11"
INCLUDES="-I $CORECLR_PATH/src/pal/inc/rt -I $CORECLR_PATH/src/pal/prebuilt/inc -I $CORECLR_PATH/src/pal/inc -I $CORECLR_PATH/src/inc -I $CORECLR_PATH/bin/Product/$BuildOS.$BuildArch.$BuildType/inc"
LIBS="-lpthread -L $CORECLR_PATH/bin/Product/Linux.x64.Release/lib -lcoreclrpal"
SOURCE="ClassFactory.cpp MODProfiler.cpp dllmain.cpp Common.cpp ProfileManager.cpp FunctionMapper.cpp FunctionInfo.cpp Logger.cpp MetaDataUtil.cpp StringUtil.cpp ThreadManager.cpp CallstackInfo.cpp TreeNode.cpp sigparse.cpp SignatureParser.cpp Setting.cpp Environment.cpp"

clang++ -shared -o $Output $CXX_FLAGS $INCLUDES $LIBS $SOURCE $CORECLR_PATH/src/pal/prebuilt/idl/corprof_i.cpp

printf 'Done.\n'