[Buildroot] [PATCH v4 2/5] package/petitboot: prefer UTF-8 support

[Reza Arbab]

The petitboot UI looks much nicer in a Unicode locale:

* Items in the language selection submenu use multibyte Unicode
  characters. In other locales, they say "Unable to display text in this
  locale".

* The combination of TERM=linux with a UTF-8 locale is required to
  trigger a special-case workaround in ncurses code[1]. Without
  this, line-drawing characters in the menu look like q's.

Add a reminder that a UTF-8 locale should be generated for things to
look right.

[1] https://invisible-island.net/ncurses/ncurses.faq.html#no_line_drawing

Signed-off-by: Reza Arbab <arbab at linux.ibm.com>
---
 package/petitboot/Config.in | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/package/petitboot/Config.in b/package/petitboot/Config.in
index 93ed3642c3c9..46327903ed2e 100644
--- a/package/petitboot/Config.in
+++ b/package/petitboot/Config.in
@@ -3,12 +3,14 @@ config BR2_PACKAGE_PETITBOOT
 	depends on BR2_PACKAGE_KEXEC_ARCH_SUPPORTS || BR2_PACKAGE_KEXEC_LITE_ARCH_SUPPORTS
 	depends on BR2_USE_MMU # lvm2
 	depends on BR2_USE_WCHAR # elfutils
+	depends on BR2_ENABLE_LOCALE
 	depends on !BR2_STATIC_LIBS # elfutils, lvm2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # elfutils, lvm2
 	depends on BR2_PACKAGE_HAS_UDEV
 	select BR2_PACKAGE_ELFUTILS
 	select BR2_PACKAGE_LVM2 # devmapper
 	select BR2_PACKAGE_NCURSES
+	select BR2_PACKAGE_NCURSES_WCHAR
 	# run-time dependencies
 	select BR2_PACKAGE_KEXEC if !BR2_PACKAGE_KEXEC_LITE_ARCH_SUPPORTS
 	select BR2_PACKAGE_KEXEC_LITE if BR2_PACKAGE_KEXEC_LITE_ARCH_SUPPORTS && !BR2_PACKAGE_KEXEC
@@ -17,12 +19,14 @@ config BR2_PACKAGE_PETITBOOT
 	help
 	  Petitboot is a small kexec-based bootloader
 
+	  NOTE: petitboot looks best in a UTF-8 locale (BR2_GENERATE_LOCALE)
+
 	  http://www.kernel.org/pub/linux/kernel/people/geoff/petitboot/petitboot.html
 
-comment "petitboot needs a toolchain w/ wchar, dynamic library, threads, udev /dev management"
+comment "petitboot needs a toolchain w/ wchar, locale, dynamic library, threads, udev /dev management"
 	depends on BR2_PACKAGE_KEXEC_ARCH_SUPPORTS
 	depends on BR2_USE_MMU
-	depends on !BR2_USE_WCHAR || BR2_STATIC_LIBS || \
+	depends on !BR2_USE_WCHAR || !BR2_ENABLE_LOCALE || BR2_STATIC_LIBS || \
 		!BR2_TOOLCHAIN_HAS_THREADS || \
 		!BR2_PACKAGE_HAS_UDEV
 
-- 
2.39.3