lapack @3.8.0+gfortran+universal: Configure fails to link VerifyFortranC due to architecture mismatch

[demisjohn (Demis D. John)]

When building with +universal, fails to "configure", with error in main.log showing:

:info:configure     [100%] Linking C executable VerifyFortranC
:info:configure     /opt/local/bin/cmake -E cmake_link_script CMakeFiles/VerifyFortranC.dir/link.txt --verbose=1
:info:configure     /usr/bin/clang -pipe -Os -DNDEBUG -Wl,-search_paths_first -Wl,-headerpad_max_install_names -L/opt/local/lib -Wl,-headerpad_max_install_names -lvecLibFort CMakeFiles/VerifyFortranC.dir/main.c.o CMakeFiles/VerifyFortranC.dir/VerifyC.c.o  -o VerifyFortranC  -L/opt/local/lib/gcc7/gcc/x86_64-apple-darwin16/7.3.0  -L/opt/local/lib/gcc7 libVerifyFortran.a 
:info:configure     Undefined symbols for architecture x86_64:
:info:configure       "__gfortran_st_write", referenced from:
:info:configure           _verifyfortran_ in libVerifyFortran.a(VerifyFortran.f.o)
:info:configure       "__gfortran_st_write_done", referenced from:
:info:configure           _verifyfortran_ in libVerifyFortran.a(VerifyFortran.f.o)
:info:configure       "__gfortran_transfer_character_write", referenced from:
:info:configure           _verifyfortran_ in libVerifyFortran.a(VerifyFortran.f.o)
:info:configure     ld: symbol(s) not found for architecture x86_64
:info:configure     clang: error: linker command failed with exit code 1 (use -v to see invocation)

If run with -universal, it builds ok.

The file VerifyFortran.f.o is x86_64 only - should it be i386 & x86_64 for a universal build? Maybe doesn't explain the above error. No idea how to fix or debug.

XCode v9.2, MacOS 10.12.6, MacBook Pro (13-inch, 2017, Four Thunderbolt 3 Ports)

[demisjohn (Demis D. John)]

main.log from failed build

[tenomoto (Takeshi Enomoto)]

In 91cba72f9d8a039dd456cbaf4c3977a5508d25d6/macports-ports (master):

lapack: fix configure failure with +gfortran

Closes: #56088