Build failure: undefined symbol check_version(...)

[Andrew Janke]

Hi, Octave folks,

I'm compiling Octave on macOS 10.13.5 and running into a build failure.

  CXXLD    libinterp/dldfcn/__delaunayn__.la
Undefined symbols for architecture x86_64:
  "check_version(std::__1::basic_string<char, 
std::__1::char_traits<char>, std::__1::allocator<char> > const&, 
std::__1::basic_string<char, std::__1::char_traits<char>, 
std::__1::allocator<char> > const&)", referenced from:
      _G__delaunayn__ in __delaunayn___la-__delaunayn__.o
  "err_disabled_feature(std::__1::basic_string<char, 
std::__1::char_traits<char>, std::__1::allocator<char> > const&, 
std::__1::basic_string<char, std::__1::char_traits<char>, 
std::__1::allocator<char> > const&, std::__1::basic_string<char, 
std::__1::char_traits<char>, std::__1::allocator<char> > const&)", 
referenced from:
      F__delaunayn__(octave_value_list const&, int) in 
__delaunayn___la-__delaunayn__.o
  "octave_dld_function::create(octave_value_list (*)(octave_value_list 
const&, int), octave::dynamic_library const&, 
std::__1::basic_string<char, std::__1::char_traits<char>, 
std::__1::allocator<char> > const&, std::__1::basic_string<char, 
std::__1::char_traits<char>, std::__1::allocator<char> > const&)", 
referenced from:
      _G__delaunayn__ in __delaunayn___la-__delaunayn__.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see 
invocation)
make[2]: *** [libinterp/dldfcn/__delaunayn__.la] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

Does anyone know what might be causing this?

(And does anyone know how to turn on a verbose build so I can see the 
exact command which is failing? 'make VERBOSE=1' doesn't seem to do 
anything.)

I can see what looks like a matching check_version(std::string, 
std::string) definition in libinterp/corefcn/defun.cc. I wonder why it's 
not being linked?

I'm using the latest sources from the Hg repository.

Configuring using the following:

$ cat my_configure
./configure \
  --prefix=/tmp/test-octave \
  --disable-readline \
  --without-fltk \
  --without-x \
  --without-qhull

Cheers,
Andrew