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dnl $Id: aclocal.m4,v 1.4 2000/06/26 00:20:19 djm Exp $
dnl
dnl OpenSSH-specific autoconf macros
dnl
dnl OSSH_CHECK_HEADER_FOR_FIELD(field, header, symbol)
dnl Does AC_EGREP_HEADER on 'header' for the string 'field'
dnl If found, set 'symbol' to be defined. Cache the result.
dnl TODO: This is not foolproof, better to compile and read from there
AC_DEFUN(OSSH_CHECK_HEADER_FOR_FIELD, [
# look for field '$1' in header '$2'
dnl This strips characters illegal to m4 from the header filename
ossh_safe=`echo "$2" | sed 'y%./+-%__p_%'`
dnl
ossh_varname="ossh_cv_$ossh_safe""_has_"$1
AC_MSG_CHECKING(for $1 field in $2)
AC_CACHE_VAL($ossh_varname, [
AC_EGREP_HEADER($1, $2, [ dnl
eval "$ossh_varname=yes" dnl
], [ dnl
eval "$ossh_varname=no" dnl
]) dnl
])
ossh_result=`eval 'echo $'"$ossh_varname"`
if test -n "`echo $ossh_varname`"; then
AC_MSG_RESULT($ossh_result)
if test "x$ossh_result" = "xyes"; then
AC_DEFINE($3)
fi
else
AC_MSG_RESULT(no)
fi
])
dnl OSSH_PATH_ENTROPY_PROG(variablename, command):
dnl Tidiness function, sets 'undef' if not found, and does the AC_SUBST
AC_DEFUN(OSSH_PATH_ENTROPY_PROG, [
AC_PATH_PROG($1, $2)
if test -z "[$]$1" ; then
$1="undef"
fi
AC_SUBST($1)
])
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