Installing IPOPT on M1 mac Issue with HSL

[AnthonyDario]

Hello, I'm trying to install IPOPT on an M1 mac and I'm running into problems running the .configure step from the instructions. It looks like the HSL library is being built for x86 for some reason. The output of the configure script ends with:

...
checking for function ma27ad_ in -L/usr/local/lib -lcoinhsl   ... no
checking for function ma27ad in -L/usr/local/lib -lcoinhsl   ... no
checking for function MA27AD_ in -L/usr/local/lib -lcoinhsl   ... no
checking for function MA27AD in -L/usr/local/lib -lcoinhsl   ... no
checking for function ma27ad__ in -L/usr/local/lib -lcoinhsl   ... no
checking for function ma27ad_ in -L/usr/local/lib -lcoinhsl   ... no
checking for function MA27AD__ in -L/usr/local/lib -lcoinhsl   ... no
checking for function MA27AD_ in -L/usr/local/lib -lcoinhsl   ... no
configure: error: Provided package HSL is not working or does not contain MA27.

The relevant piece from config.log seems to be:

...
configure:24545: checking for function ma27ad_ in -L/usr/local/lib -lcoinhsl                  
configure:24570: gcc -o conftest -O2 -DNDEBUG    conftest.c -L/usr/local/lib -lcoinhsl    >&5
ld: warning: ignoring file /usr/local/lib/libcoinhsl.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
Undefined symbols for architecture arm64:
  "_ma27ad_", referenced from:
      _main in conftest-2123bd.old: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
...

Running the steps in the IPOPT installation instructions for HSL I don't see any error output. I have tried running both configure scripts with the CC=gcc-11 CXX=g++-11 flags without success. Is there something I'm missing? Help would be much appreciated!

[svigerske]

You'll have to look into the build of the HSL library. Maybe the Fortran compiler defaults to build for macOS-x86_64 and some extra flags need to be given (ADD_FFLAGS, ADD_FCFLAGS)?
(I have no M1 mac to try this out.)

[AnthonyDario]

Thanks for the prompt reply! I was able to get it working with coinbrew. The command I used was arch -x86_64 ./coinbrew build Ipopt --prefix /usr/local --test --no-prompt --verbosity=3 CC=gcc-11 CXX=g++-11.

I did have a problem with my metis installation from homebrew though. I needed to install it using an x86 installation of homebrew. The instructions for getting this version of homebrew I found on stackoverflow.