Re: Cross-building GHC

[ludo@gnu.org (Ludovic Courtès)]

Nikita Karetnikov <nikita@karetnikov.org> skribis:

> I'm trying to cross-build the Glasgow Haskell Compiler 7.6.2 [1].
>
> I got stuck when I was trying to build a cross-compiler (Stage 1).
> For some reason, it uses '/usr/bin/ld' instead of a cross-linker.

You mean it _tries_ to use it, because it’s not available in chroot
builds, right?

> # ./configure --target=mips64el-linux \
>               --with-gcc=/nix/store/khdyz3i5aih56lxfk6hjvp3884apm7qb-gcc-cross-mips64el-linux-gnu-4.7.2/bin/mips64el-linux-gnu-gcc \
>               --with-ld=/nix/store/bqw0chxysv4x73mf6bv7jqmgy7553xqh-binutils-cross-mips64el-linux-gnu-2.22/bin/mips64el-linux-gnu-ld \
>               --with-nm=/nix/store/khdyz3i5aih56lxfk6hjvp3884apm7qb-gcc-cross-mips64el-linux-gnu-4.7.2/bin/mips64el-linux-gnu-gcc-nm
>
> However, the above doesn't work.  I'm getting the following error:
>
> /usr/bin/ld: /nix/store/mifp2p1zjlvb4ndslw1r8grkpglybqjf-glibc-cross-mips64el-linux-gnu-2.17/include/../lib/crt1.o: Relocations in generic ELF (EM: 8)
> /usr/bin/ld: /nix/store/mifp2p1zjlvb4ndslw1r8grkpglybqjf-glibc-cross-mips64el-linux-gnu-2.17/include/../lib/crt1.o: Relocations in generic ELF (EM: 8)
> /usr/bin/ld: /nix/store/mifp2p1zjlvb4ndslw1r8grkpglybqjf-glibc-cross-mips64el-linux-gnu-2.17/include/../lib/crt1.o: Relocations in generic ELF (EM: 8)
> /usr/bin/ld: /nix/store/mifp2p1zjlvb4ndslw1r8grkpglybqjf-glibc-cross-mips64el-linux-gnu-2.17/include/../lib/crt1.o: Relocations in generic ELF (EM: 8)
> /nix/store/mifp2p1zjlvb4ndslw1r8grkpglybqjf-glibc-cross-mips64el-linux-gnu-2.17/include/../lib/crt1.o: could not read symbols: File in wrong format
> collect2: ld returned 1 exit status
> configure: error: Building ghc-pwd failed

Perhaps it needs both a native GCC and a cross-GCC (ditto for ‘ld’), no?
(For instance because ghc-pwd is a program to run during the build, so
it needs to be a native program.)

Does it have --with-target-gcc or similar in addition to --with-gcc?

If not, you should find the Makefile that triggers the faulty
/usr/bin/ld invocation above, and see if you could patch it somehow.

Wild guesses & free advice.  ;-)

Ludo’.