OpenWrt – Blame information for rev 2

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Rev Author Line No. Line
1 office 1 dnl as-ac-expand.m4 0.2.0
2 dnl autostars m4 macro for expanding directories using configure's prefix
3 dnl thomas@apestaart.org
4  
5 dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)
6 dnl example
7 dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)
8 dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local
9  
10 AC_DEFUN([AS_AC_EXPAND],
11 [
12 EXP_VAR=[$1]
13 FROM_VAR=[$2]
14  
15 dnl first expand prefix and exec_prefix if necessary
16 prefix_save=$prefix
17 exec_prefix_save=$exec_prefix
18  
19 dnl if no prefix given, then use /usr/local, the default prefix
20 if test "x$prefix" = "xNONE"; then
21 prefix="$ac_default_prefix"
22 fi
23 dnl if no exec_prefix given, then use prefix
24 if test "x$exec_prefix" = "xNONE"; then
25 exec_prefix=$prefix
26 fi
27  
28 full_var="$FROM_VAR"
29 dnl loop until it doesn't change anymore
30 while true; do
31 new_full_var="`eval echo $full_var`"
32 if test "x$new_full_var" = "x$full_var"; then break; fi
33 full_var=$new_full_var
34 done
35  
36 dnl clean up
37 full_var=$new_full_var
38 AC_SUBST([$1], "$full_var")
39  
40 dnl restore prefix and exec_prefix
41 prefix=$prefix_save
42 exec_prefix=$exec_prefix_save
43 ])