llvm dev - Jul 2020 - undefined reference witn DBUILD_SHARED_LIBS

Hi, all: 
During I merge my out-of-tree pass to in-tree, I meet some problem like
following, fpscan is my pass name:
If I open DBUILD_SHARED_LIBS option,: 
[1/2657] Linking CXX shared library lib/libLLVMfpscan.so.11git
FAILED: lib/libLLVMfpscan.so.11git 
: && /usr/bin/c++ -fPIC -fPIC -fvisibility-inlines-hidden
-Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings
-Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long
-Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-noexcept-type
-Wdelete-non-virtual-dtor -Wno-comment -fdiagnostics-color -ffunction-sections
-fdata-sections -O3 -DNDEBUG  -Wl,-z,defs -Wl,-z,nodelete  
-Wl,-rpath-link,/home/phantom/llvm/build/llvm/./lib  -Wl,-O3 -Wl,--gc-sections
-shared -Wl,-soname,libLLVMfpscan.so.11git -o lib/libLLVMfpscan.so.11git
lib/Transforms/fpscan/CMakeFiles/LLVMfpscan.dir/fpscan.cpp.o 
-Wl,-rpath,"\$ORIGIN/../lib" && :
lib/Transforms/fpscan/CMakeFiles/LLVMfpscan.dir/fpscan.cpp.o: In function
`llvm::fpscan::printLine(llvm::Instruction const*)':
fpscan.cpp:(.text._ZN4llvm6fpscan9printLineEPKNS_11InstructionE+0x19): undefined
reference to `llvm::outs()'
fpscan.cpp:(.text._ZN4llvm6fpscan9printLineEPKNS_11InstructionE+0xf7): undefined
reference to `llvm::raw_ostream::operatorfpscan.cpp:
fpscan.cpp:(.text._ZN4llvm6fpscan9printLineEPKNS_11InstructionE+0x16a):
undefined reference to `llvm::Value::print(llvm::raw_ostream&, bool)
const'
fpscan.cpp:(.text._ZN4llvm6fpscan9printLineEPKNS_11InstructionE+0x1d0):
undefined reference to `llvm::raw_ostream::write(char const*, unsigned
long)'
fpscan.cpp:(.text._ZN4llvm6fpscan9printLineEPKNS_11InstructionE+0x21a):
undefined reference to `llvm::MDString::getString() const'
fpscan.cpp:(.text._ZN4llvm6fpscan9printLineEPKNS_11InstructionE+0x271):
undefined reference to `llvm::raw_ostream::write(char const*, unsigned
long)'
fpscan.cpp:(.text._ZN4llvm6fpscan9printLineEPKNS_11InstructionE+0x2c3):
undefined reference to `llvm::raw_ostream::operatorfpscan.cpp:
...

I have include their hear file (I can run out-of-tree), and add require in LLVM
builder
type = Library
name = fpscan
parent = Transforms
library_name = fpscan
required_libraries = Core Support TransformUtils

So, I really have no idea why it still can't find the reference, did I still
miss something, thks