[GHC] #12193: Include target versions of unlit and hsc2hs when cross-compiling

[GHC]

#12193: Include target versions of unlit and hsc2hs when cross-compiling
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           Reporter:  glaubitz       |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Hello!

 I have been working on getting ghc packaged on Debian for m68k and sh4.

 While ghc itself works without any major issues on these targets, the
 performance is a bit too low to just build ghc from sources on the
 machines itself. It works, but it may take up to three weeks or more.

 To workaround this problem, I am using a cross-compiled version of ghc on
 these platforms which works quite well. However, while using the cross-
 compiled Debian ghc packaged, I noticed that some packages fail to build
 from source because my cross-compiled version of ghc is missing the
 "unlit" utility.

 Looking at the result of the cross-compiled ghc for m68k, it's obvious why
 unlit is missing:


 {{{
 glaubitz at ikarus:~/debian/ghc/ghc-8.0.1$ file ./inplace/lib/bin/*
 ./inplace/lib/bin/ghc-iserv:      ELF 32-bit MSB executable, Motorola
 m68k, 68020, version 1 (SYSV), dynamically linked, interpreter
 /lib/ld.so.1, for GNU/Linux 3.2.0,
 BuildID[sha1]=39f595d60d0c596714aa0fedcc0bfa3a35921c41, not stripped
 ./inplace/lib/bin/ghc-iserv-prof: ELF 32-bit MSB executable, Motorola
 m68k, 68020, version 1 (SYSV), dynamically linked, interpreter
 /lib/ld.so.1, for GNU/Linux 3.2.0,
 BuildID[sha1]=f83f10fc7d925f54fb18816384ae91ae6c1b9ac8, not stripped
 ./inplace/lib/bin/ghc-pkg:        ELF 64-bit LSB executable, x86-64,
 version 1 (SYSV), dynamically linked, interpreter /lib64/ld-
 linux-x86-64.so.2, for GNU/Linux 2.6.32,
 BuildID[sha1]=41d534ca0e83df11274eade67477db1e9667fec5, not stripped
 ./inplace/lib/bin/ghc-stage1:     ELF 64-bit LSB executable, x86-64,
 version 1 (SYSV), dynamically linked, interpreter /lib64/ld-
 linux-x86-64.so.2, for GNU/Linux 2.6.32,
 BuildID[sha1]=089a2121e49e16ea7ba721c350b04a965b19dded, not stripped
 ./inplace/lib/bin/ghc-stage2:     ELF 32-bit MSB executable, Motorola
 m68k, 68020, version 1 (SYSV), dynamically linked, interpreter
 /lib/ld.so.1, for GNU/Linux 3.2.0,
 BuildID[sha1]=589cdca9242bd132e1c80736a79ebf4209eb1c78, not stripped
 ./inplace/lib/bin/hpc:            ELF 32-bit MSB executable, Motorola
 m68k, 68020, version 1 (SYSV), dynamically linked, interpreter
 /lib/ld.so.1, for GNU/Linux 3.2.0,
 BuildID[sha1]=f401ba499a4cf865def36a7dc6d7c3a32385c85f, not stripped
 ./inplace/lib/bin/hsc2hs:         ELF 64-bit LSB executable, x86-64,
 version 1 (SYSV), dynamically linked, interpreter /lib64/ld-
 linux-x86-64.so.2, for GNU/Linux 2.6.32,
 BuildID[sha1]=a532a7cc6f0c1e95e7c66aab2b4c53e1d0b58d88, not stripped
 ./inplace/lib/bin/unlit:          ELF 64-bit LSB executable, x86-64,
 version 1 (SYSV), dynamically linked, interpreter /lib64/ld-
 linux-x86-64.so.2, for GNU/Linux 2.6.32,
 BuildID[sha1]=30ab37170ddcb09bcb7885ae3c18a353f6d128b7, not stripped
 glaubitz at ikarus:~/debian/ghc/ghc-8.0.1$
 }}}

 Thus, both "unlit" and "hsc2hs" are not built for the target architecture
 when cross-compiling. After a quick look at utils/unlit/ghc.mk, it becomes
 obvious why that's the case:

 {{{
 $(eval $(call build-prog,utils/unlit,dist,0))
 }}}

 Would it be possible to change the build configuration such that "unlit"
 and "hsc2hs" are built for the target as well when cross-compiling? That
 would be great :).

 Adrian

 [1] [https://buildd.debian.org/status/fetch.php?pkg=haskell-
 fmlist&arch=m68k&ver=0.9-4&stamp=1465990971]

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12193>
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