[Buildroot] [PATCH 2/4] core: find a host UTF-8 locale

Yann E. MORIN yann.morin.1998 at free.fr
Sun Mar 4 10:29:04 UTC 2018

Some packages really want to use an UTF-8 locale, or they break.

However, there is no guarantee that any given locale is available on a
system. For example,, while most mainstream distros (Debian and
derivatives, Fedora...) do have the generic, language-agnostic C.UTF-8
locale, Gentoo does not provide it.

So, find the first UTF-8 locale available on the system, and take any
that is available. We however do favour using the user-set current
locale, then using the language-agnostic C.UTF-8, and eventually any
random C.UTF-8 locale.

Note: we only need to enforce LC_ALL, because setting it implies
everything else:

    1. If the LC_ALL environment variable is defined and is not null,
    the value of LC_ALL shall be used.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
 Makefile | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Makefile b/Makefile
index 5fe3a34c47..aca4e66302 100644
--- a/Makefile
+++ b/Makefile
@@ -363,6 +363,22 @@ ifneq ($(firstword $(HOSTCC_VERSION)),4)
+# First, we try to use the user's configured locale (as that's the
+# language they'd expect messages to be displayed), then we favour
+# a non language-specific locale like C.UTF-8 if one is available,
+# so we sort with the C locale to get it at the top.
+# This is guaranteed to not be empty, because of the check in
+# support/dependencies/dependencies.sh
+HOST_UTF8_LOCALE := $(shell \
+			( echo $${LC_ALL:-$${LC_MESSAGES:-$${LANG}}}; \
+			  locale -a 2>/dev/null |LC_ALL=C sort \
+			) \
+			|grep -i -E 'utf-?8' \
+			|head -n 1)
 # Make sure pkg-config doesn't look outside the buildroot tree

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