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dnl @synopsis AC_DEFINE_DIR(VARNAME, DIR [, DESCRIPTION])
dnl
dnl This macro defines (with AC_DEFINE) VARNAME to the expansion of the DIR
dnl variable, taking care of fixing up ${prefix} and such.
dnl
dnl Note that the 3 argument form is only supported with autoconf 2.13 and
dnl later (i.e. only where AC_DEFINE supports 3 arguments).
dnl
dnl Examples:
dnl
dnl AC_DEFINE_DIR(DATADIR, datadir)
dnl AC_DEFINE_DIR(PROG_PATH, bindir, [Location of installed binaries])
dnl
dnl @version $Id: acinclude.m4,v 1.3 2000/08/04 03:26:22 stenn Exp $
dnl @author Alexandre Oliva <oliva@lsd.ic.unicamp.br>
AC_DEFUN([AC_DEFINE_DIR], [
ac_expanded=`(
test "x$prefix" = xNONE && prefix="$ac_default_prefix"
test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
eval echo \""[$]$2"\"
)`
ifelse([$3], [],
AC_DEFINE_UNQUOTED([$1], ["$ac_expanded"]),
AC_DEFINE_UNQUOTED([$1], ["$ac_expanded"], [$3]))
])
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