Detected locale "C" with character encoding "ANSI_X3.4-1968"

[DungeonLords]

Hello! In my own Linux image I try to start any Qt app. But I get warning

Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.
Qt depends on a UTF-8 locale, but has failed to switch to one.
If this causes problems, reconfigure your locale. See the locale(1) manual
for more information.

But if I do

export LC_ALL=en_US.utf8 && ./myapp

Then works without warning. How to ask Qt to switch to en_US.utf8 by himself? May be set something in my toolchain_cross.cmake file? I use it to build Qt from source code...

[jsulm]

@DungeonLords You should rather change your locale to UTF-8. This should actually be the default with most Linux distributions. What Linux distribution do you use.

You can check what locale is configured on your system using "locale" command.

[turmoiloil]

anonymous@amnesia:~/vlc$ locale
LANG=C.UTF-8
LANGUAGE=
LC_CTYPE="C.UTF-8"
LC_NUMERIC="C.UTF-8"
LC_TIME="C.UTF-8"
LC_COLLATE="C.UTF-8"
LC_MONETARY="C.UTF-8"
LC_MESSAGES="C.UTF-8"
LC_PAPER="C.UTF-8"
LC_NAME="C.UTF-8"
LC_ADDRESS="C.UTF-8"
LC_TELEPHONE="C.UTF-8"
LC_MEASUREMENT="C.UTF-8"
LC_IDENTIFICATION="C.UTF-8"
LC_ALL=
this is the output of the locale command. i guess my locale is utf8. why am i still getting this error: configure: error: Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.
Qt depends on a UTF-8 locale, and has switched to "C.UTF-8" instead.
If this causes problems, reconfigure your locale. See the locale(1) manual

[jsulm]

@turmoiloil said in Detected locale "C" with character encoding "ANSI_X3.4-1968":

why am i still getting this error

Looks like Qt does not support C.UTF-8.
How did you install Qt?