as-ac-expand.m4

Revision 1334, 1.1 kB (checked in by thomasvs, 4 years ago)
autogen.sh: m4/as-ac-expand.m4: add m4 dir and use it add an expand macro configure.ac: uniformize configure's output across the annodex stack

Line
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	])

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