gcc7 fails to build because of missing library libisl

[programmingkidx]

Hi, I tried to build a program using gcc7 but it fails due to a missing library.

Here is the full error:

dyld: Library not loaded: /usr/local/lib/libisl.15.dylib
  Referenced from: /usr/local/gcc7/7.5.0/bin/../libexec/gcc/powerpc-apple-darwin8.11.0/7.5.0/cc1
  Reason: image not found
gcc-7: internal compiler error: Trace/BPT trap (program cc1)

I did a search of my hard drive for libisl and could not find it. I suggest including this file in the archive.