| dnl as-ac-expand.m4 0.2.0 |
| dnl autostars m4 macro for expanding directories using configure's prefix |
| dnl thomas@apestaart.org |
| |
| dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR) |
| dnl example |
| dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir) |
| dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local |
| |
| AC_DEFUN([AS_AC_EXPAND], |
| [ |
| EXP_VAR=[$1] |
| FROM_VAR=[$2] |
| |
| dnl first expand prefix and exec_prefix if necessary |
| prefix_save=$prefix |
| exec_prefix_save=$exec_prefix |
| |
| dnl if no prefix given, then use /usr/local, the default prefix |
| if test "x$prefix" = "xNONE"; then |
| prefix="$ac_default_prefix" |
| fi |
| dnl if no exec_prefix given, then use prefix |
| if test "x$exec_prefix" = "xNONE"; then |
| exec_prefix=$prefix |
| fi |
| |
| full_var="$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 |
| AC_SUBST([$1], "$full_var") |
| |
| dnl restore prefix and exec_prefix |
| prefix=$prefix_save |
| exec_prefix=$exec_prefix_save |
| ]) |
