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core: find a host UTF-8 locale

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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 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.
    """

[Peter: use same regexp as in dependencies.sh]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Yann E. MORIN 2018-03-04 11:29:04 +01:00 committed by Peter Korsgaard
parent 9f8c7766e4
commit c2a9358b6e
1 changed files with 16 additions and 0 deletions
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16
Makefile
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@ -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