gnu: Add glibc-locales.

* gnu/packages/patches/glibc-locales.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/base.scm (glibc-locales): New variable.

gnu-system.am

@@ -393,6 +393,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/glibc-CVE-2014-7817.patch		\
   gnu/packages/patches/glibc-bootstrap-system.patch		\
   gnu/packages/patches/glibc-ldd-x86_64.patch			\
+  gnu/packages/patches/glibc-locales.patch			\
   gnu/packages/patches/glibc-mips-dangling-vfork-ref.patch	\
   gnu/packages/patches/gmp-arm-asm-nothumb.patch		\
   gnu/packages/patches/gnunet-fix-scheduler.patch		\

gnu/packages/base.scm

@@ -33,6 +33,7 @@
   #:use-module (gnu packages linux)
   #:use-module (gnu packages texinfo)
   #:use-module (gnu packages pkg-config)
+  #:use-module (guix utils)
   #:use-module (guix packages)
   #:use-module (guix download)
   #:use-module (guix build-system gnu))
@@ -520,6 +521,40 @@ with the Linux kernel.")
    (license lgpl2.0+)
    (home-page "http://www.gnu.org/software/libc/")))
 
+(define-public glibc-locales
+  (package
+    (inherit glibc)
+    (name "glibc-locales")
+    (source (origin (inherit (package-source glibc))
+                    (patches (cons (search-patch "glibc-locales.patch")
+                                   (origin-patches (package-source glibc))))))
+    (synopsis "All the locales supported by the GNU C Library")
+    (description
+     "This package provides all the locales supported by the GNU C Library,
+more than 400 in total.  To use them set the 'LOCPATH' environment variable to
+the 'share/locale' sub-directory of this package.")
+    (outputs '("out"))                            ;110+ MiB
+    (arguments
+     (let ((args `(#:tests? #f #:strip-binaries? #f
+                   ,@(package-arguments glibc))))
+       (substitute-keyword-arguments args
+         ((#:phases phases)
+          `(alist-replace
+            'build
+            (lambda* (#:key outputs #:allow-other-keys)
+              (let ((out (assoc-ref outputs "out")))
+                ;; Delete $out/bin, which contains 'bash'.
+                (delete-file-recursively (string-append out "/bin")))
+
+              (zero? (system* "make" "localedata/install-locales"
+                              "-j" (number->string (parallel-job-count)))))
+            (alist-delete 'install ,phases)))
+         ((#:configure-flags flags)
+          `(append ,flags
+                   (list (string-append "libc_cv_localedir="
+                                        (assoc-ref %outputs "out")
+                                        "/share/locale")))))))))
+
 (define-public tzdata
   (package
     (name "tzdata")

gnu/packages/patches/glibc-locales.patch

@@ -0,0 +1,31 @@
+This patch allows us to use glibc's build system to build locales
+in a package separate from glibc.
+
+  1. Use 'localedef' from $PATH since we are not rebuilding it.
+  2. Use '--no-archive' to avoid building the big locale archive, and
+     because the already-built 'localedef' would want to write it
+     to '/run/current-system/locale', which is not possible.
+  3. Pass $(localedir)/$$locale to install files in the right place, and
+     because otherwise, 'localedef' fails with:
+     "cannot write output files to `(null)'".
+
+--- glibc-2.20/localedata/Makefile	2014-09-07 10:09:09.000000000 +0200
++++ glibc-2.20/localedata/Makefile	2015-02-11 10:23:55.560545568 +0100
+@@ -217,7 +217,7 @@ INSTALL-SUPPORTED-LOCALES=$(addprefix in
+ 
+ # Sometimes the whole collection of locale files should be installed.
+ LOCALEDEF=I18NPATH=. GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
+-$(rtld-prefix) $(common-objpfx)locale/localedef
++  localedef --no-archive
+ install-locales: $(INSTALL-SUPPORTED-LOCALES)
+ 
+ install-locales-dir:
+@@ -234,7 +234,7 @@ $(INSTALL-SUPPORTED-LOCALES): install-lo
+ 	input=`echo $$locale | sed 's/\([^.]*\)[^@]*\(.*\)/\1\2/'`; \
+ 	$(LOCALEDEF) --alias-file=../intl/locale.alias \
+ 		     -i locales/$$input -c -f charmaps/$$charset \
+-		     $(addprefix --prefix=,$(install_root)) $$locale; \
++		     $(addprefix --prefix=,$(install_root)) $(localedir)/$$locale; \
+ 	echo ' done'; \
+ 
+ tst-setlocale-ENV = LC_ALL=ja_JP.EUC-JP