[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:
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_02
"""
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)
HOSTCC_VERSION := $(firstword $(HOSTCC_VERSION))
endif
+ifeq ($(BR2_NEEDS_HOST_UTF8_LOCALE),y)
+# 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)
+HOST_UTF8_LOCALE_ENV := LC_ALL=$(HOST_UTF8_LOCALE)
+endif
+
# Make sure pkg-config doesn't look outside the buildroot tree
HOST_PKG_CONFIG_PATH := $(PKG_CONFIG_PATH)
unexport PKG_CONFIG_PATH
--
2.14.1
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