arm-none-eabi-gcc: broken build on 10.13 / Xcode 10 (isl issue)

[mojca (Mojca Miklavec)]

I had arm-none-eabi-gcc installed from the buildbot, but when I tried to build it from source, I was stuck with a build error.

:info:build clang: error: unsupported option '-print-multi-os-directory'
:info:build clang: error: no input files
...
:info:build /path/to/arm-none-eabi-gcc/work/gcc-7.3.0/gcc/graphite-dependences.c:48:16: error: use of undeclared identifier 'isl_space_get_tuple_id'; did you mean 'isl_map_get_tuple_id'?
:info:build   isl_id *id = isl_space_get_tuple_id (d, isl_dim_in);
:info:build                ^~~~~~~~~~~~~~~~~~~~~~
:info:build                isl_map_get_tuple_id

See:

• ​https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86724
• ​https://github.com/osx-cross/homebrew-avr/commit/ef705e991484b05742037a7ec2137fd346fb2fd4
• ​https://github.com/osx-cross/homebrew-avr/commit/9880124718b22b04b7049e149a0fc8f25905fffa

[mojca (Mojca Miklavec)]

Build error of arm-none-eabi-gcc

[mojca (Mojca Miklavec)]

The build works after ​https://github.com/macports/macports-ports/pull/2988, but I probably need to add dependency on isl and I suspect other ports might be affected as well.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

In 84402f32c850371a1c46d72452d4fc99d462f347/macports-ports (master):

cross/*-gcc: add isl dep & patch for latest version

No revbump because port with builds correctly or not at all.

Fixes #57573
Closes ​https://github.com/macports/macports-ports/pull/2988