RPATH_CHANGE fails when shared object is a GNU ld script

From LLVM build:

if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xcxxx" OR NOT CMAKE_INSTALL_COMPONENT)
  if(EXISTS "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libc++.so" AND
     NOT IS_SYMLINK "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libc++.so")
    file(RPATH_CHECK
         FILE "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libc++.so"
         RPATH "")
  endif()
  file(INSTALL DESTINATION "${CMAKE_INSTALL_PREFIX}/lib" TYPE SHARED_LIBRARY FILES "/home/user/llvm/llvm.stage1.build/lib/libc++.so")
  if(EXISTS "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libc++.so" AND
     NOT IS_SYMLINK "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libc++.so")
    file(RPATH_CHANGE
         FILE "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libc++.so"
         OLD_RPATH "/home/user/llvm/llvm.stage1.build/lib:"
         NEW_RPATH "")
    if(CMAKE_INSTALL_DO_STRIP)
      execute_process(COMMAND "/usr/bin/strip" "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libc++.so")
    endif()
  endif()
endif()

-- Installing: /home/user/llvm/llvm.stage1.bin/lib/libc++.so
CMake Error at projects/libcxx/src/cmake_install.cmake:88 (file):
  file RPATH_CHANGE could not write new RPATH:

    

  to the file:

    /home/user/llvm/llvm.stage1.bin/lib/libc++.so

Call Stack (most recent call first):
  projects/libcxx/cmake_install.cmake:56 (include)
  projects/cmake_install.cmake:49 (include)
  cmake_install.cmake:76 (include)


FAILED: CMakeFiles/install.util 
cd /home/user/llvm/llvm.stage1.build && /usr/bin/cmake -P cmake_install.cmake

$ cat llvm.stage1.bin/lib/libc++.so
INPUT(libc++.so.1 -lc++abi)