Hello,

I compile CC from source using the following .config:

CONFIG_TARGET_ar71xx=y
CONFIG_TARGET_ar71xx_generic=y
CONFIG_TARGET_ar71xx_generic_GLINET=y
CONFIG_DEVEL=y
CONFIG_BUILD_NLS=y
CONFIG_SDK=y
CONFIG_PACKAGE_iconv=y
CONFIG_PACKAGE_libcharset=y
CONFIG_PACKAGE_libiconv-full=y
CONFIG_PACKAGE_libintl-full=y
CONFIG_PACKAGE_kmod-fs-nfs=y
CONFIG_PACKAGE_nfs-utils=y

Then I run the following program

#include <wchar.h>
#include <locale.h>
int main(void)
{
  setlocale(LC_CTYPE, "C.UTF-8");
  wprintf(L"привет мир\n");
  return 0;
}

(on Debian 9 this program runs OK)
I get this output

Invalid wide format string.

Also, "locale" command does not exist.

Which config options must be set to enable uclibc locale support?

What is curious:
1) if we use "hello world" instead of "привет мир" - it works OK
2) if I use getwc() on non-ascii file (on ascii file it works OK), it fails with "getwc: Invalid or incomplete multibyte or wide character" (input is valid UTF-8 and works OK on Debian 9)

(Last edited by igor.liferenko on 15 Mar 2017, 10:12)

I tried the same programs in trunk and it works OK (commit 871372c42a3fc9c4b33f5c6011742d610a2e5600).

I also added these build options to be able to type UTF-8 characters in terminal:

CONFIG_BUSYBOX_CUSTOM=y
CONFIG_BUSYBOX_CONFIG_LAST_SUPPORTED_WCHAR=0
CONFIG_BUSYBOX_CONFIG_LOCALE_SUPPORT=y
CONFIG_BUSYBOX_CONFIG_SUBST_WCHAR=65533
CONFIG_BUSYBOX_CONFIG_UNICODE_PRESERVE_BROKEN=y
CONFIG_BUSYBOX_CONFIG_UNICODE_SUPPORT=y
CONFIG_BUSYBOX_CONFIG_UNICODE_USING_LOCALE=y
CONFIG_PACKAGE_kmod-nls-utf8=y

(I just enabled everything, so some options may be unnecessary - feedback welcome)

(Last edited by igor.liferenko on 17 Mar 2017, 03:02)

It turns out that the example program works in Designated Driver with default .config - no special options mentioned above are necessary (the reason is that musl is used instead of uClibc by default).