[CMake] Don't generate linker script only when shared library isn't statically linked

[phosek]

Summary

Since r337668, we support statically linking dependencies only to shared
or static library. However, that change hasn't updated the check whether
to generate a linker script. We shouldn't generate linker script only in
the case when we aren't statically linked ABI into the shared library.

libcxx/trunk/CMakeLists.txt

cmake_dependent_option(LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY
   "LIBCXX_ENABLE_STATIC_ABI_LIBRARY;LIBCXX_ENABLE_STATIC" OFF)
 
 # Generate and install a linker script inplace of libc++.so. The linker script
 # will link libc++ to the correct ABI library. This option is on by default
 # on UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY'
 # is on. This option is also disabled when the ABI library is not specified
 # or is specified to be "none".
 set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF)
-if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_ENABLE_STATIC_ABI_LIBRARY
+if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY
       AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"
       AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "default"
       AND PYTHONINTERP_FOUND
       AND LIBCXX_ENABLE_SHARED)
     set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON)
 endif()
 
 option(LIBCXX_ENABLE_ABI_LINKER_SCRIPT
if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
     if (NOT PYTHONINTERP_FOUND)
       message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT requires python but it was not found.")
     endif()
     if (NOT LIBCXX_ENABLE_SHARED)
       message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT is only available for shared library builds.")
     endif()
 endif()
 
-if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
+if (LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
     message(FATAL_ERROR "Conflicting options given.
         LIBCXX_ENABLE_STATIC_ABI_LIBRARY cannot be specified with
         LIBCXX_ENABLE_ABI_LINKER_SCRIPT")
 endif()
 
 if (LIBCXX_HAS_MUSL_LIBC AND NOT LIBCXX_INSTALL_SUPPORT_HEADERS)
   message(FATAL_ERROR "LIBCXX_INSTALL_SUPPORT_HEADERS can not be turned off"
                       "when building for Musl with LIBCXX_HAS_MUSL_LIBC.")