Help needed: fix build issue with xdxf_makedict in older platforms

[Leonardo Brondani Schenkel]

On 2017-11-07 19:46, Ken Cunningham wrote:
> Leonardo, I find you can reproduce this build error on any system (I 
> just did it on high sierra) if you do this:
> 
> install clang-5.0 and libgcc as normally from the prebuilt packages
> 
> sudo port install libgcc clang-5.0
> 
> then run
> 
> sudo port -v -s destroot xdxf_makedict 
> configure.cxx_stdlib=macports-libstdc++ 
> configure.compiler=macports-clang-5.0
> 
> and you duplicate the errors promptly.

Unfortunately that did not work for me, the port fails at the configure 
phase:

-- The C compiler identification is Clang 5.0.0
-- The CXX compiler identification is Clang 5.0.0
-- Check for working C compiler: /opt/local/bin/clang-mp-5.0
-- Check for working C compiler: /opt/local/bin/clang-mp-5.0 -- broken
CMake Error at 
/opt/local/share/cmake-3.9/Modules/CMakeTestCCompiler.cmake:51 (message):
   The C compiler "/opt/local/bin/clang-mp-5.0" is not able to compile a
   simple test program.

[...]

   /opt/local/bin/clang-mp-5.0 -pipe -Os -DNDEBUG -arch x86_64
   -mmacosx-version-min=10.13 -Wl,-search_paths_first
   -Wl,-headerpad_max_install_names -L/opt/local/lib
   -Wl,-headerpad_max_install_names
   CMakeFiles/cmTC_16cfb.dir/testCCompiler.c.o -o cmTC_16cfb

   ld: unexpected token: !tapi-tbd-v2 file
 
'/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/lib/libSystem.tbd'
   for architecture x86_64

// Leonardo.