Disable locales other than C and POSIX because of a compilation error.
By Danny Milosavljevic <dannym@scratchpost.org>
This patch is distributed under BSD-3 license.
See https://github.com/osresearch/heads/pull/610
diff -ruN b/source/patches/gcc-5.3.0-locale.diff guix-build-musl-cross-0.1-3.a8a6649.drv-12/source/patches/gcc-5.3.0-locale.diff
--- a/patches/gcc-5.3.0-locale.diff	1970-01-01 01:00:00.000000000 +0100
+++ b/patches/gcc-5.3.0-locale.diff	2020-05-02 14:20:47.213564509 +0200
@@ -0,0 +1,12 @@
+--- gcc-5.3.0/libstdc++-v3/config/locale/gnu/ctype_members.cc.orig	2020-05-02 14:16:31.376147000 +0200
++++ gcc-5.3.0/libstdc++-v3/config/locale/gnu/ctype_members.cc	2020-05-02 14:16:56.716279576 +0200
+@@ -47,7 +47,8 @@
+ 	this->_S_create_c_locale(this->_M_c_locale_ctype, __s); 
+ 	this->_M_toupper = this->_M_c_locale_ctype->__ctype_toupper;
+ 	this->_M_tolower = this->_M_c_locale_ctype->__ctype_tolower;
+-	this->_M_table = this->_M_c_locale_ctype->__ctype_b;
++	//this->_M_table = this->_M_c_locale_ctype->__ctype_b;
++	throw 3;
+       }
+   }
+ 
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<tr><td><span title='2020-11-05 16:13:50 +0100'>2020-11-05</span></td><td><a href='/guix/commit/gnu/build/shepherd.scm?id=e6934c0429ed94c9d9e61f81520d11153bbb3f64'>shepherd: Remove dependency on (guix utils).</a><span class='msg-avail'>...<span class='msg-tooltip'>Since commit 8ce6f4dc2879919c12bc76a2f4b01200af97e019, importing this
module in a gexp would pull in (guix config) from the host, thereby
leading to non-reproducible derivations.  Users in (gnu services ...) do
not expect that so simply remove the (guix utils) dependency for now.

* gnu/build/shepherd.scm (fork+exec-command/container)[strip-pid]: New
procedure.
Use it instead of 'strip-keyword-arguments'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-09-21 10:22:12 +0200'>2020-09-21</span></td><td><a href='/guix/commit/gnu/build/shepherd.scm?id=6453915cf7729203ef9552c13cb4528c6f4ed122'>build: shepherd: Check for container support.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes: &lt;https://issues.guix.gnu.org/43533&gt;.

* gnu/build/shepherd.scm (fork+exec-command/container): Check if containers
are supported before joining PID namespaces.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-09-02 17:05:23 +0200'>2020-09-02</span></td><td><a href='/guix/commit/gnu/build/shepherd.scm?id=8ce6f4dc2879919c12bc76a2f4b01200af97e019'>installer: Run the installation inside a container.</a><span class='msg-avail'>...<span class='msg-tooltip'>When the store overlay is mounted, other processes such as kmscon, udev
and guix-daemon may open files from the store, preventing the
underlying install support from being umounted. See:
https://lists.gnu.org/archive/html/guix-devel/2018-12/msg00161.html.

To avoid this situation, mount the store overlay inside a container,
and run the installation from within that container.

* gnu/build/shepherd.scm (fork+exec-command/container): New procedure.
* gnu/services/base.scm (guix-shepherd-service): Support an optional PID
argument passed to the "start" method. If that argument is passed, ensure that
guix-daemon enters the given PID MNT namespace by using
fork+exec-command/container procedure.
* gnu/installer/final.scm (umount-cow-store): Remove it,
(install-system): run the installation from within a container.
* gnu/installer/newt/final.scm (run-install-shell): Remove the display hack.
</span></span></td><td>Mathieu Othacehe</td></tr>