ghc @8.8.3 iconv not found in build stage

[p-bro]

On Mac OS 10.13.6 (High Sierra) a build of ghc @8.8.3 fails at the build stage with the following error:

:info:build checking for library containing iconv... no
:info:build configure: error: iconv is required on non-Windows platforms
:info:build make[1]: *** [libraries/base/dist-install/package-data.mk] Error 1

Full log is attached.

However, libiconv @1.16_0 is installed (as indirect dependency via gnupg2 and pkgconfig), so I'm not sure why it is not found.

[p-bro]

ghc build log

[essandess (Steve Smith)]

Scratching my head on this one. The buildbot worked for 10.14. I tested it on 10.15.

[snowflake (Dave Evans)]

It broke for me too on 10.11

However the buildbot for 10.11 and later now shows it building OK in the last few days.

[ryandesign (Ryan Carsten Schmidt)]

ghc does not declare a dependency on port:libiconv. If ghc requires libiconv, which this error message seems to indicate it does, then the port should declare that dependency.

[essandess (Steve Smith)]

Do not add libiconv as a ghc dependency. Without the missing fix to use it for the entire build, this will break stuff. The workaround is to temporarily deactivate libiconv.

See:

• #61222
• ​https://gitlab.haskell.org/ghc/ghc/-/issues/18743

[essandess (Steve Smith)]

See ​https://github.com/macports/macports-ports/pull/8523

[essandess (Steve Smith)]

In ab891551d4693be90aa6492b0f4e5b8d98cebf29/macports-ports (master):

ghc: Bugfixes for test and iconv linking

Fixes:

• #61223
• #61222
• #61221
• #61220
• #60171