This patch is taken from debian's glibc package (generate-supported.mk).
It install the localedata/SUPPORTED file of the glibc. This file lists
all the supported locales of the glibc.

diff --git a/localedata/Makefile.old b/localedata/Makefile
index 34877c0..a61d9b9 100644
--- a/localedata/Makefile.old
+++ b/localedata/Makefile
@@ -91,7 +91,8 @@ endif
 # Files to install.
 install-others := $(addprefix $(inst_i18ndir)/, \
 			      $(addsuffix .gz, $(charmaps)) \
-			      $(locales))
+			      $(locales)) \
+                   $(inst_i18ndir)/SUPPORTED
 
 tests: $(objdir)/iconvdata/gconv-modules
 
@@ -195,6 +196,14 @@ endif
 
 include SUPPORTED
 
+$(inst_i18ndir)/SUPPORTED: SUPPORTED $(+force)
+	for locale in $(SUPPORTED-LOCALES); do \
+		[ $$locale = true ] && continue; \
+		echo $$locale | sed 's,/, ,' >> LOCALES; \
+	done
+	$(make-target-directory)
+	$(INSTALL_DATA) LOCALES $@
+
 INSTALL-SUPPORTED-LOCALES=$(addprefix install-, $(SUPPORTED-LOCALES))
 
 # Sometimes the whole collection of locale files should be installed.
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<tr><td><span title='2024-08-31 10:45:18 +0200'>2024-08-31</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=fe88550267db8d26c0086dd858fd1b0884227490'>gnu: 389-ds-base: Fix build.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openldap.scm (389-ds-base)[source]: Add snippet.
[inputs]: Add libxcrypt.

Change-Id: I5ddb30e8a0ae23e7795a0a9a9e3f00b48379e3e8
</span></span></td><td>宋文武</td></tr>
<tr><td><span title='2024-08-31 10:42:41 +0200'>2024-08-31</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=75497ecc4aca27078b1b66991b8ef33abfd11845'>gnu: 389-ds-base: Add 'bash' input for 'wrap-program'.</a><span class='msg-avail'>...<span class='msg-tooltip'>It is required for cross-compilation.

* gnu/packages/openldap.scm
  (389-ds-base)[inputs]: Add 'bash-minimal'.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Maxime Devos</td></tr>
<tr><td><span title='2024-08-31 10:42:16 +0200'>2024-08-31</span></td><td><a href='/guix/commit/gnu/packages/openldap.scm?id=f59df1aa3c104aabff3291f6b8b155fb01aebc06'>build-systems: gnu: Export %default-gnu-imported-modules and %default-gnu-mod...</a><span class='msg-avail'>...<span class='msg-tooltip'>Until now users would have to cargo cult or inspect the private
%default-modules variable of (guix build-systems gnu) to discover which
modules to include when extending the used modules via the #:modules argument.

The renaming was automated via the command:

  $ git grep -l %gnu-build-system-modules
    | xargs sed 's/%gnu-build-system-modules/%default-gnu-imported-modules/' -i

* guix/build-system/gnu.scm (%gnu-build-system-modules): Rename to...
(%default-gnu-imported-modules): ... this.
(%default-modules): Rename to...
(%default-gnu-modules): ... this.  Export.
(dist-package, gnu-build, gnu-cross-build): Adjust accordingly.

Change-Id: Idef307fff13cb76f3182d782b26e1cd3a5c757ee
</span></span></td><td>Maxim Cournoyer</td></tr>