Get the ldconfig check to work for bash shells.

configure.ac

diff --git a/configure.ac b/configure.ac
index 3af335e..0f6002e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,7 +57,7 @@
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_CHECK_PROG(C2MAN,c2man,c2man,\$(TOPSRCDIR)/tools/c2man.pl)
-AC_PATH_PROG(LDCONFIG, ldconfig, true, /sbin:/usr/sbin:$PATH)
+AC_PATH_PROG(LDCONFIG, ldconfig, true, [/sbin /usr/sbin $PATH])
 
 dnl Check for lint
 AC_CHECK_PROGS(LINT, lclint lint)