[MacPorts] #36111: ghc-7.4.2 fails to build on osx-12.1.0

[MacPorts]

#36111: ghc-7.4.2 fails to build on osx-12.1.0
------------------------+--------------------------------
 Reporter:  easieste@…  |      Owner:  macports-tickets@…
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.1.2
 Keywords:              |       Port:  ghc
------------------------+--------------------------------
 Building ghc-7.4.2 fails to build complaining about not being able to
 execute /opt/local/bin/gcc-mp-4.7:
 {{{
 "inplace/bin/ghc-stage1" -prof  -H32m -O    -package-name ghc-7.4.2 -hide-
 all-packages -i -icompiler/basicTypes -icompiler/cmm -icompiler/codeGen
 -icompiler/coreSyn -icompiler/deSugar -icompiler/ghci -icompiler/hsSyn
 -icompiler/iface -icompiler/llvmGen -icompiler/main -icompiler/nativeGen
 -icompiler/parser -icompiler/prelude -icompiler/profiling
 -icompiler/rename -icompiler/simplCore -icompiler/simplStg
 -icompiler/specialise -icompiler/stgSyn -icompiler/stranal
 -icompiler/typecheck -icompiler/types -icompiler/utils
 -icompiler/vectorise -icompiler/stage2/build
 -icompiler/stage2/build/autogen -Icompiler/stage2/build
 -Icompiler/stage2/build/autogen -Icompiler/../rts/dist/build
 -Icompiler/stage2 -Icompiler/../libraries/base/cbits
 -Icompiler/../libraries/base/include -Icompiler/. -Icompiler/parser
 -Icompiler/utils   -optP-DGHCI -optP-include
 -optPcompiler/stage2/build/autogen/cabal_macros.h -package Cabal-1.14.0
 -package array-0.4.0.0 -package base-4.5.1.0 -package bin-package-
 db-0.0.0.0 -package bytestring-0.9.2.1 -package containers-0.4.2.1
 -package directory-1.1.0.2 -package filepath-1.3.0.0 -package
 hoopl-3.8.7.3 -package hpc-0.5.1.1 -package old-time-1.1.0.0 -package
 process-1.1.0.1 -package template-haskell-2.7.0.0 -package unix-2.5.1.1
 -Wall -fno-warn-name-shadowing -fno-warn-orphans -XHaskell98
 -XNondecreasingIndentation -XCPP -XMagicHash -XUnboxedTuples
 -XPatternGuards -XForeignFunctionInterface -XEmptyDataDecls
 -XTypeSynonymInstances -XMultiParamTypeClasses -XFlexibleInstances
 -XRank2Types -XScopedTypeVariables -XDeriveDataTypeable -XBangPatterns
 -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -O2  -no-user-package-conf -rtsopts
 -odir compiler/stage2/build -hidir compiler/stage2/build -stubdir
 compiler/stage2/build -hisuf p_hi -osuf  p_o -hcsuf p_hc -c
 compiler/parser/LexCore.hs -o compiler/stage2/build/LexCore.p_o
 ghc-stage1: could not execute: /opt/local/bin/gcc-mp-4.7
 make[1]: *** [libraries/template-haskell/dist-
 install/build/Language/Haskell/TH/Syntax.o] Error 1
 make[1]: *** Waiting for unfinished jobs....
 make: *** [all] Error 2
 make: Leaving directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_ghc/ghc/work/ghc-7.4.2'
 Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_ghc/ghc/work/ghc-7.4.2"
 && /usr/bin/make -j4 -w all
 Exit code: 2
 Error: org.macports.build for port ghc returned: command execution failed
 Warning: targets not executed for ghc: org.macports.activate
 org.macports.build org.macports.destroot org.macports.install
 Error: Failed to install ghc
 }}}

 which is an odd message as the "inplace/bin/ghc-stage1" script gets used
 succesfully previously in the build, and
 {{{
 tethys:~$ ls -l /opt/local/bin/gcc-mp-4.7
 -rwxr-xr-x  3 root  admin  778760 Sep 12 12:46 /opt/local/bin/gcc-mp-4.7*
 tethys:~$ /opt/local/bin/gcc-mp-4.7 --version
 gcc-mp-4.7 (MacPorts gcc47 4.7.1_4) 4.7.1
 Copyright (C) 2012 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/36111>
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