Problem with groff's configure script on z/OS Unix

[Werner LEMBERG]

> Got the latest from CVS and got it over to z/OS UNIX.  Unfortunately
> it does not build.  First, configure died with the error:
>
> ./configure 772: FSUM7341 bad file descriptor "5"
>
> That is when I run it from a script - but then when I run it from
> the command line, I don't get this error.  This is probably another
> OS/390ism that should be looked into (but I haven't seen it before
> with other configure scripts).

This means it dies on the following snipped from groff's configure
script built with autoconf 2.52:

======================================================================

{
cat <<_ASUNAME
## ---------- ##
## Platform.  ##
## ---------- ##

hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
uname -m = `(uname -m) 2>/dev/null || echo unknown`
uname -r = `(uname -r) 2>/dev/null || echo unknown`
uname -s = `(uname -s) 2>/dev/null || echo unknown`
uname -v = `(uname -v) 2>/dev/null || echo unknown`
   
/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
/bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`

/bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
hostinfo               = `(hostinfo) 2>/dev/null               || echo unknown`
/bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
/bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`

PATH = $PATH

_ASUNAME
} >&5

======================================================================

Has the autoconf team seen this already?  I ask here to shorten the
time for finding the problem...


    Werner