source: git/acinclude.m4 @ 9fba2b0

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
dnl    AC_DEFINE_DIR(PROG_PATH, bindir, [Location of installed binaries])
dnl
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))
])