bash 2.05b configure fails to set HANDLE_MULTIBYTE correctly

[Phil Edwards]

[This is the third attempt to report this bug; previous attempts were rejected
by the gnu.org MTA with bizarre errors.  So I'm cc'ing the maintainer address
as well.]

Configuration Information [Automatically generated, do not change]:
Machine: ia64
OS: hpux11.23
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='ia64' 
-DCONF_OSTYPE='hpux11.23' -DCONF_MACHTYPE='ia64-hp-hpux11.23' -DCONF_VENDOR='hp' 
-DSHELL -DHAVE_CONFIG_H -DHPUX  -I.  -I../bash -I../bash/include -I../bash/lib 
-g -O2
uname output: HP-UX saruman B.11.23 U ia64 0427783794 unlimited-user license
Machine Type: ia64-hp-hpux11.23

Bash Version: 2.05b
Patch Level: 0
Release Status: release

Description:

HP-UX 11, being the freak that it is, passes the configure tests for
wchar.h and whatnot, but manages to not have a declaration of any of the
multibyte functions.  HANDLE_MULTIBYTE still gets set to 1, leading to
errors like:

  gcc  -DPROGRAM='"bash"' -DCONF_HOSTTYPE='"ia64"' -DCONF_OSTYPE='"hpux11.23"'
    -DCONF_MACHTYPE='"ia64-hp-hpux11.23"' -DCONF_VENDOR='"hp"' -DSHELL
    -DHAVE_CONFIG_H -DHPUX  -I.  -I../bash -I../bash/include -I../bash/lib
    -g -O2 -c y.tab.c
  ../bash/parse.y: In function `set_line_mbstate':
  ../bash/parse.y:4551: error: `mbrlen' undeclared (first use in this function)
  ../bash/parse.y:4551: error: (Each undeclared identifier is reported only once
  ../bash/parse.y:4551: error: for each function it appears in.)
  make: *** [y.tab.o] Error 1

Trying to manually override HANDLE_MULTIBYTE in the headers is
needlessly complicated by having the exact same set of logic reproduced
in multiple files (config-bot.h and shmbutil.h at least, maybe more I
haven't found yet).

Please make the wchar- and multibyte-related tests a little more fine-grained.
Or at the very least, share the resulting configuration information so that
we only need to override it in one place.


Repeat-By:
        Find an hpux11 box.  Build bash.  No special configuration.