configure: Shorten lopsub error message.

Remove the download instructions and just ask the user to install
the lopsub-dev package.

diff --git a/configure.ac b/configure.ac
index 00e0f0984340227e53d8c1d255ba6f923af86108..580dd40947b8da12e3122aac5db61fff0dace5c3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -11,20 +11,11 @@ AC_PROG_CPP
 
 AC_DEFUN([LOPSUB_NOT_FOUND], [
 The lopsub library is required to build this software, but the 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.
+indicate it is not installed on your system. Run
 
-If you installed lopsub at a non-standard location, make sure to set
-PATH, CPPFLAGS and LDFLAGS accordingly. For example:
-
-       pfx=/prefix/where/lopsub/is/installed
-       export PATH=\$pfx/bin:\$PATH
-       export CPPFLAGS=-I\$pfx/include
-       export LDFLAGS=-L\$pfx/lib
-])
+       apt-get install liblopsub-dev
 
+to install the library, then run this configure script again.])
 AC_DEFUN([REQUIRE_EXECUTABLE], [
        AC_PATH_PROG(m4_toupper([$1]), [$1])
        test -z "$m4_toupper([$1])" && AC_MSG_ERROR([$2])