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- dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)
- dnl example
- dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)
- dnl will set SYSCONFDIR to /usr/local/etc
-
- dnl written by thomas vander stichele
-
- AC_DEFUN([AS_AC_EXPAND],
- [
- EXP_VAR=[$1]
- FROM_VAR=[$2]
-
- dnl first expand prefix and exec_prefix if necessary
- prefix_save=$prefix
- if test "x$prefix" = "xNONE"; then
- prefix=/usr/local
- fi
- exec_prefix_save=$exec_prefix
- if test "x$exec_prefix" = "xNONE"; then
- if test "x$prefix_save" = "xNONE"; then
- exec_prefix=/usr/local
- else
- exec_prefix=$prefix
- fi
- fi
-
- full_var="$FROM_VAR"
- dnl loop until it doesn't change anymore
- while true; do
- new_full_var="`eval echo $full_var`"
- if test "x$new_full_var" = "x$full_var"; then break; fi
- full_var=$new_full_var
- done
-
- dnl clean up
- full_var=$new_full_var
- [$1]=$full_var
- prefix=$prefix_save
- exec_prefix=$exec_prefix_save
- ])
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