problem with building gcc-cross-4.8.3 for i686-pc-gnu

[Manolis Ragkousis <manolis837@gmail.com>]

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Hello guix, Hello Ludo

When trying to build coreutils for i686-pc-gnu, building
cross-gcc-4.8.3 with glibc-hurd fails with:

In unknown file:
   ?: 0 [string-append
"/gnu/store/1hl59s1pikplwfgclw4mlk38pkx3pc72-glibc-hurd-cross-i686-pc-gnu-2.18"
...]

ERROR: In procedure string-append:
ERROR: In procedure string-append: Wrong type (expecting string): #f

It shouldn't fail because glibc/hurd is in the path.

Checking the patch-source-shebangs phase, in the build log, shows that
the /bin/sh path is changed to use the native glibc, which I believe causes
the problem.

I am trying to understand and solve this, but I think I am
missing something from the building procedure of coreutils, so any
advice will be helpful. Why it doesn't use the glibc that it just cross-built?

I am attaching the build log and the env vars.

Thank you,
Manolis

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export CPATH="/gnu/store/3h38sfay2f02rk4i768ci8xabl706rf9-glibc-2.20/include:/gnu/store/rw5s9immq72plzajqm8g8i4sfg8z0kyc-linux-libre-headers-3.3.8/include:/gnu/store/1hl59s1pikplwfgclw4mlk38pkx3pc72-glibc-hurd-cross-i686-pc-gnu-2.18/include:/gnu/store/26wgqpd56vka6nvhq7qmb9wlm45n5dz7-hurd-minimal-cross-i686-pc-gnu-0.5/include:/gnu/store/57nflkf654zbc5wbsgkrvv3swqpnm4qz-hurd-headers-cross-i686-pc-gnu-0.5/include:/gnu/store/afz0x4z8vj4pimjkvjsbsy3dz3llsxkf-gnumach-headers-cross-i686-pc-gnu-1.4/include:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/include:/gnu/store/s0lg3f8wjdynln0086bqz7igsjmf5411-mpfr-3.1.2/include:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/include:/gnu/store/w87kcf7m1jh0jrl1kazbv7m2ldwybxq8-mpc-1.0.2/include:/gnu/store/s0lg3f8wjdynln0086bqz7igsjmf5411-mpfr-3.1.2/include:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/include:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/include:/gnu/store/ik0xxrzqgsz76gz3dbqcgfr5agl2khb9-isl-0.11.1/include:/gnu/store/c5cjz3qz09ayr6x742xhcf9zgyjymbv8-cloog-0.18.0/include:/gnu/store/2lg7wrqwvmmqh5vd8zvv1gwjfpbkgk38-libelf-0.8.13/include:/gnu/store/kmbdwpxvp4d5n7lm2j4829x7km8cyl1y-zlib-1.2.7/include:/gnu/store/nlns82dixqq4lkmpbvxg9crspihgrbf3-bzip2-1.0.6/include:/gnu/store/5s0minkxnzyazi4yra7p97g8dnfv4g16-xz-5.0.4/include:/gnu/store/9xdlrfvy2w3n24b7z22wd7dnjddxjndy-file-5.19/include:/gnu/store/2rmb78pg4nxc4dg4ffmm7qnar3j4am32-gawk-4.1.1/include:/gnu/store/qx2kk00lhmqsrickigdgi4kb733xgd2r-make-4.0/include:/gnu/store/45ki3bmjs5xchx071kq86542d5y2dfp2-binutils-2.24/include:/gnu/store/nmxfncmpj4ymdlr8d4k3lcdcc6mbwb6w-gcc-4.8.3/include"
export HOME="/homeless-shelter"
export LIBRARY_PATH="/gnu/store/3h38sfay2f02rk4i768ci8xabl706rf9-glibc-2.20/lib:/gnu/store/1hl59s1pikplwfgclw4mlk38pkx3pc72-glibc-hurd-cross-i686-pc-gnu-2.18/lib:/gnu/store/26wgqpd56vka6nvhq7qmb9wlm45n5dz7-hurd-minimal-cross-i686-pc-gnu-0.5/lib:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/lib:/gnu/store/s0lg3f8wjdynln0086bqz7igsjmf5411-mpfr-3.1.2/lib:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/lib:/gnu/store/w87kcf7m1jh0jrl1kazbv7m2ldwybxq8-mpc-1.0.2/lib:/gnu/store/s0lg3f8wjdynln0086bqz7igsjmf5411-mpfr-3.1.2/lib:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/lib:/gnu/store/9ia5ps6x1ir1hml58vvjyh1l7ww46gnk-gmp-6.0.0a/lib:/gnu/store/ik0xxrzqgsz76gz3dbqcgfr5agl2khb9-isl-0.11.1/lib:/gnu/store/c5cjz3qz09ayr6x742xhcf9zgyjymbv8-cloog-0.18.0/lib:/gnu/store/2lg7wrqwvmmqh5vd8zvv1gwjfpbkgk38-libelf-0.8.13/lib:/gnu/store/kmbdwpxvp4d5n7lm2j4829x7km8cyl1y-zlib-1.2.7/lib:/gnu/store/nlns82dixqq4lkmpbvxg9crspihgrbf3-bzip2-1.0.6/lib:/gnu/store/5s0minkxnzyazi4yra7p97g8dnfv4g16-xz-5.0.4/lib:/gnu/store/9xdlrfvy2w3n24b7z22wd7dnjddxjndy-file-5.19/lib:/gnu/store/2rmb78pg4nxc4dg4ffmm7qnar3j4am32-gawk-4.1.1/lib:/gnu/store/45ki3bmjs5xchx071kq86542d5y2dfp2-binutils-2.24/lib"
export NIX_BUILD_CORES="2"
export NIX_BUILD_TOP="/tmp/nix-build-gcc-cross-i686-pc-gnu-4.8.3.drv-0"
export NIX_STORE="/gnu/store"
export OLDPWD
export PATH="/gnu/store/bszwxw0d77f6mi3l8n5zn5v94306fziq-binutils-cross-i686-pc-gnu-2.24/bin:/gnu/store/3h38sfay2f02rk4i768ci8xabl706rf9-glibc-2.20/bin:/gnu/store/3h38sfay2f02rk4i768ci8xabl706rf9-glibc-2.20/sbin:/gnu/store/1hl59s1pikplwfgclw4mlk38pkx3pc72-glibc-hurd-cross-i686-pc-gnu-2.18/bin:/gnu/store/1hl59s1pikplwfgclw4mlk38pkx3pc72-glibc-hurd-cross-i686-pc-gnu-2.18/sbin:/gnu/store/c5cjz3qz09ayr6x742xhcf9zgyjymbv8-cloog-0.18.0/bin:/gnu/store/vzp9kx3qia35isi3isrmhr9klzd3wkp7-tar-1.28/bin:/gnu/store/q5dxwd523y0blylj3k2s5y4lr7llxc31-gzip-1.6/bin:/gnu/store/nlns82dixqq4lkmpbvxg9crspihgrbf3-bzip2-1.0.6/bin:/gnu/store/5s0minkxnzyazi4yra7p97g8dnfv4g16-xz-5.0.4/bin:/gnu/store/9xdlrfvy2w3n24b7z22wd7dnjddxjndy-file-5.19/bin:/gnu/store/l23x1c00415hpnnb8ilka3bv8xfv5qbn-diffutils-3.3/bin:/gnu/store/5b0sidpj18sys487b0n508rcjxmygwv2-patch-2.7.1/bin:/gnu/store/ai555s3wy50rsa74mlnw3jfbgj3fx9y1-sed-4.2.2/bin:/gnu/store/bna9rhyfz9ijl3hhgnmsywy4cld5fma9-findutils-4.4.2/bin:/gnu/store/2rmb78pg4nxc4dg4ffmm7qnar3j4am32-gawk-4.1.1/bin:/gnu/store/3hy722q3q4pd9mbk4jp2q3y1pb4mp4mv-grep-2.20/bin:/gnu/store/arvd1w0vywxdz8pir3cdagqg21lcrid0-coreutils-8.23/bin:/gnu/store/qx2kk00lhmqsrickigdgi4kb733xgd2r-make-4.0/bin:/gnu/store/3fd4cw58xy7k7sg6hj08b06vgk4qfhdv-bash-4.3.25/bin:/gnu/store/387mkhv1cnb6c4l54cky2l1ca9c9dxvi-ld-wrapper-0/bin:/gnu/store/45ki3bmjs5xchx071kq86542d5y2dfp2-binutils-2.24/bin:/gnu/store/nmxfncmpj4ymdlr8d4k3lcdcc6mbwb6w-gcc-4.8.3/bin"
export PWD="/tmp/nix-build-gcc-cross-i686-pc-gnu-4.8.3.drv-0/gcc-4.8.3"
export SHLVL="1"
export TEMP="/tmp/nix-build-gcc-cross-i686-pc-gnu-4.8.3.drv-0"
export TEMPDIR="/tmp/nix-build-gcc-cross-i686-pc-gnu-4.8.3.drv-0"
export TMP="/tmp/nix-build-gcc-cross-i686-pc-gnu-4.8.3.drv-0"
export TMPDIR="/tmp/nix-build-gcc-cross-i686-pc-gnu-4.8.3.drv-0"
export out="/gnu/store/a1a3z1avs14vm4xs8qsa4s8arlhbipx2-gcc-cross-i686-pc-gnu-4.8.3"