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guix: Use gcc-9 for mingw-w64 instead of 8

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The libtool unsorted 'find' determinism issue seemed to have been solved
in gcc-9's git: d41cd173e23ebea7c758644d6ad6e0fde1c2e3a6 or SVN: r262451

Furthermore, it seems that Ubuntu Focal 20.04 LTS is going to ship with
gcc 9 and mingw-w64 7, which will match what we have now.

-----

A note on this:

Careful observers will see that previously I stated that all released
versions of gcc were bootstrapped with a libtool 2.2.7a, meaning that
they all had the unsorted 'find' determinism issue first resolved in
libtool 2.2.7b.

However, I was mistaken, gcc's ltmain.sh CLAIMS it was generated by
libtool 2.2.7a, but it was in fact edited manually. It seems that gcc
maintains their own versions of ltmain.sh and libtool.m4, and only
sometimes backports patches from upstream.

Quite confusing.
This commit is contained in:
Carl Dong 2020-04-07 18:23:53 -04:00
parent ba0b99bdd6
commit 0b66d22da5
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@ -128,7 +128,7 @@ desirable for building Bitcoin Core release binaries."
(pthreads-xlibc mingw-w64-x86_64-winpthreads)
(pthreads-xgcc (make-gcc-with-pthreads
(cross-gcc target
#:xgcc (make-ssp-fixed-gcc gcc-8)
#:xgcc (make-ssp-fixed-gcc gcc-9)
#:xbinutils xbinutils
#:libc pthreads-xlibc))))
;; Define a meta-package that propagates the resulting XBINUTILS, XLIBC, and