package/bash: fix uclibc build without wchar

Fixes:
 - http://autobuild.buildroot.org/results/298fb9c785e137bff432dd304eb56986e54ce3ed

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bash/0018-locale.c-fix-build-without-wchar.patch

@@ -0,0 +1,84 @@
+From 73ca494c60d46103f806325e6ccbe9e400238008 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sun, 23 Feb 2020 11:41:09 +0100
+Subject: [PATCH] locale.c: fix build without wchar
+
+bash unconditionally builds locale.c which depends on mblen since
+version 5.0 and
+https://github.com/bminor/bash/commit/d233b485e83c3a784b803fb894280773f16f2deb
+
+This results in the following build failure if wchar is not available:
+
+/home/buildroot/autobuild/run/instance-0/output-1/host/bin/microblazeel-buildroot-linux-uclibc-gcc -L./builtins -L/home/buildroot/autobuild/run/instance-0/output-1/host/microblazeel-buildroot-linux-uclibc/sysroot/lib -L/home/buildroot/autobuild/run/instance-0/output-1/host/microblazeel-buildroot-linux-uclibc/sysroot/lib -L./lib/glob -L./lib/tilde  -L./lib/sh  -rdynamic -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O2   -Wno-parentheses -Wno-format-security   -o bash shell.o eval.o y.tab.o general.o make_cmd.o print_cmd.o  dispose_cmd.o execute_cmd.o variables.o copy_cmd.o error.o expr.o flags.o jobs.o subst.o hashcmd.o hashlib.o mailcheck.o trap.o input.o unwind_prot.o pathexp.o sig.o test.o version.o alias.o array.o arrayfunc.o assoc.o braces.o bracecomp.o bashhist.o bashline.o  list.o stringlib.o locale.o findcmd.o redir.o pcomplete.o pcomplib.o syntax.o xmalloc.o signames.o -lbuiltins -lglob -lsh -lreadline -lhistory -lcurses -ltilde     -ldl
+/home/buildroot/autobuild/run/instance-0/output-1/host/lib/gcc/microblazeel-buildroot-linux-uclibc/8.3.0/../../../../microblazeel-buildroot-linux-uclibc/bin/ld: locale.o: in function `set_default_locale':
+(.text+0x260): undefined reference to `mblen'
+
+To fix this issue, don't use mblen if HANDLE_MULTIBYTE is not defined,
+an other possibility would be to use MBLEN wrapper defined in shmbutil.h
+
+Fixes:
+ - http://autobuild.buildroot.org/results/298fb9c785e137bff432dd304eb56986e54ce3ed
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://savannah.gnu.org/support/index.php?110200]
+---
+ locale.c | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/locale.c b/locale.c
+index d62547f6..a64c5b4b 100644
+--- a/locale.c
++++ b/locale.c
+@@ -86,7 +86,9 @@ set_default_locale ()
+ 
+   locale_mb_cur_max = MB_CUR_MAX;
+   locale_utf8locale = locale_isutf8 (default_locale);
++#if defined (HANDLE_MULTIBYTE)
+   locale_shiftstates = mblen ((char *)NULL, 0);
++#endif
+ }
+ 
+ /* Set default values for LC_CTYPE, LC_COLLATE, LC_MESSAGES, LC_NUMERIC and
+@@ -107,7 +109,9 @@ set_default_locale_vars ()
+       locale_setblanks ();
+       locale_mb_cur_max = MB_CUR_MAX;
+       locale_utf8locale = locale_isutf8 (lc_all);
++#    if defined (HANDLE_MULTIBYTE)
+       locale_shiftstates = mblen ((char *)NULL, 0);
++#    endif
+       u32reset ();
+     }
+ #  endif
+@@ -211,7 +215,9 @@ set_locale_var (var, value)
+       /* if LC_ALL == "", reset_locale_vars has already called this */
+       if (*lc_all && x)
+ 	locale_utf8locale = locale_isutf8 (lc_all);
++#  if defined (HANDLE_MULTIBYTE)
+       locale_shiftstates = mblen ((char *)NULL, 0);
++#  endif
+       u32reset ();
+       return r;
+ #else
+@@ -231,7 +237,9 @@ set_locale_var (var, value)
+ 	  /* if setlocale() returns NULL, the locale is not changed */
+ 	  if (x)
+ 	    locale_utf8locale = locale_isutf8 (x);
++#    if defined (HANDLE_MULTIBYTE)
+ 	  locale_shiftstates = mblen ((char *)NULL, 0);
++#    endif
+ 	  u32reset ();
+ 	}
+ #  endif
+@@ -368,7 +376,9 @@ reset_locale_vars ()
+   locale_mb_cur_max = MB_CUR_MAX;
+   if (x)
+     locale_utf8locale = locale_isutf8 (x);
++#  if defined (HANDLE_MULTIBYTE)
+   locale_shiftstates = mblen ((char *)NULL, 0);
++#  endif
+   u32reset ();
+ #endif
+   return 1;
+-- 
+2.25.0
+