[gnome-continuous-yocto/gnomeostree-3.28-rocko: 1423/8267] glibc: use the host locale archive in nativesdk builds

[Emmanuele Bassi <ebassi src gnome org>]

commit 6494a59552de5ce12e645b0cef8be30228b335a3
Author: Ross Burton <ross burton intel com>
Date:   Wed Jul 6 10:54:29 2016 +0100

    glibc: use the host locale archive in nativesdk builds
    
    The nativesdk libc when used by buildtools has a hard requirement on supporting
    a UTF-8 locale because Python 3 needs a UTF-8 locale.  However we currently only
    ship the C locale, which means that Python attempts to lookup the user's locale
    (for example, en_NZ.UTF-8) in the locale archive under it's prefix it fails and
    falls back to C.  This the results in Python using ASCII instead of UTF-8 for
    file encoding, and bitbake breaks.
    
    Th obvious solution would be to ship all locales, but this would add
    approximately 250MB to the size of the buildtools tarball (which is currently
    around 30MB).  Generating a binary locale archive reduces this down to 100MB,
    but this is still a drastic increase in footprint.  If we ship a subset of
    locales in the tarball then there will be users whose locale isn't in the
    tarball, and they'll have to change their locale to an "approved" one, which
    isn't the best of messages to send to new users.
    
    The alternative is to tell the nativesdk libc that the locale archive isn't
    under it own prefix but is in fact at /usr/lib/locale/locale-archive, so the
    buildtools libc uses the host locale archive. The locale archive format appears
    to be at least fairly stable: our glibc 2.24 can read the locale archive
    generated by glibc 2.17 (Centos 7).
    
    [ YOCTO #9775 ]
    
    (From OE-Core rev: 75321b6b0f2c0ac667b9350b387b01a188e195c8)
    
    Signed-off-by: Ross Burton <ross burton intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/recipes-core/glibc/glibc_2.24.bb |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/meta/recipes-core/glibc/glibc_2.24.bb b/meta/recipes-core/glibc/glibc_2.24.bb
index 456f206..4bc6443 100644
--- a/meta/recipes-core/glibc/glibc_2.24.bb
+++ b/meta/recipes-core/glibc/glibc_2.24.bb
@@ -129,6 +129,12 @@ do_compile () {
 
 }
 
+# Use the host locale archive when built for nativesdk so that we don't need to
+# ship a complete (100MB) locale set.
+do_compile_prepend_class-nativesdk() {
+    echo "complocaledir=/usr/lib/locale" >> ${S}/configparms
+}
+
 require glibc-package.inc
 
 BBCLASSEXTEND = "nativesdk"