test -z "$INSTALL" && AC_MSG_ERROR(
[The install program is required to build this package])
+AC_PATH_PROG([lopsubgen], [lopsubgen])
+test -z "$lopsubgen" && AC_MSG_ERROR(
+ [lopsubgen is required to build this package])
+
AC_PROG_CC
AC_PROG_CPP
AC_CHECK_LIB([osl], [osl_open_table], [], [HAVE_OSL=no])
LIB_SUBST_FLAGS(osl)
UNSTASH_FLAGS
+######################################################################## lopsub
+STASH_FLAGS
+LIB_ARG_WITH([lopsub], [-llopsub])
+HAVE_LOPSUB=yes
+AC_CHECK_HEADER(lopsub.h, [], [HAVE_LOPSUB=no])
+AC_CHECK_LIB([lopsub], [lls_merge], [], [HAVE_LOPSUB=yes])
+if test $HAVE_LOPSUB = no; then AC_MSG_ERROR([
+ The lopsub library is required to build this software, but
+ the above checks indicate it is not installed on your system.
+ Run the following command to download a copy.
+ git clone git://git.tuebingen.mpg.de/lopsub.git
+ Install the library, then run this configure script again.
+])
+fi
+LIB_SUBST_FLAGS([lopsub])
+UNSTASH_FLAGS
######################################################################## openssl
STASH_FLAGS
HAVE_OPENSSL=yes