Bug 104023

Summary:	fontconfig warning if no locales installed
Product:	fontconfig	Reporter:	Phil Race <philip.race>
Component:	library	Assignee:	fontconfig-bugs
Status:	RESOLVED NOTABUG	QA Contact:	Behdad Esfahbod <freedesktop>
Severity:	minor
Priority:	medium	CC:	akira
Version:	2.11
Hardware:	All
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Phil Race 2017-12-01 21:32:59 UTC

Here I am on a fully working Ubuntu 16.04 LTS and ordinarily I get no warning
$ env|grep LANG
LANG=en_US.UTF-8
$ fc-match sans
DejaVuSans.ttf: "DejaVu Sans" "Book"

But if I mimic having no locales :

$ export LANG=UTF-8
$ fc-match sans
Fontconfig warning: ignoring UTF-8: not a valid region tag
DejaVuSans.ttf: "DejaVu Sans" "Book"

So in other words if you don't install any locales on the system, fontconfig will issue this error.

This came up in a minimal new install used for some testing.
Perhaps a setting of UTF-8 should be silently ignored but
a conclusion that fontconfig should always warn in this situation is
fine by me, but I'd at least like to document it.

Comment 1 Akira TAGOH 2017-12-04 06:50:16 UTC

fontconfig warns because you set the invalid locale at the env var. not  because it isn't installed on the system. see:

$ LANG=xyz.UTF-8 locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=xyz.UTF-8
LC_CTYPE="xyz.UTF-8"
LC_NUMERIC=ja_JP.UTF-8
LC_TIME=ja_JP.UTF-8
LC_COLLATE="xyz.UTF-8"
LC_MONETARY=ja_JP.UTF-8
LC_MESSAGES="xyz.UTF-8"
LC_PAPER=ja_JP.UTF-8
LC_NAME="xyz.UTF-8"
LC_ADDRESS="xyz.UTF-8"
LC_TELEPHONE="xyz.UTF-8"
LC_MEASUREMENT=ja_JP.UTF-8
LC_IDENTIFICATION="xyz.UTF-8"
LC_ALL=
$ LANG=xyz.UTF-8 fc-match
DejaVuSans.ttf: "DejaVu Sans" "Book"

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