configure.ac, lib/Makefile.am: Respect $(bindir) in PASSWD_PROGRAM

Suggested-by: Evgeny Grin (Karlson2k) <k2k@drgrin.dev>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

Author: alejandro-colomar

configure.ac

@@ -103,9 +103,6 @@ done])
 AC_DEFINE_UNQUOTED([FAILLOG_FILE], ["$shadow_cv_logdir/faillog"],
 	[Path for faillog file.])
 
-AC_DEFINE_UNQUOTED([PASSWD_PROGRAM], ["$exec_prefix/bin/passwd"],
-	[Path to passwd program.])
-
 AC_ARG_ENABLE([shadowgrp],
 	[AS_HELP_STRING([--enable-shadowgrp], [enable shadow group support @<:@default=yes@:>@])],
 	[case "${enableval}" in

lib/Makefile.am

@@ -1,7 +1,8 @@
 
 AUTOMAKE_OPTIONS = 1.0 foreign
 
-DEFS =
+DEFS = \
+	-DPASSWD_PROGRAM='"$(bindir)/passwd"'
 
 noinst_LTLIBRARIES = libshadow.la