+# The Check unit testing framework is optional. Disable if not found.
+PKG_CHECK_MODULES([check], [check >= 0.9.4],
+ [have_check="yes"; CFLAGS="$CFLAGS $check_CFLAGS";
+ LIBS="$LIBS $check_LIBS"], [have_check="no"])
+AM_CONDITIONAL(HAVE_CHECK, test x"$have_check" = "xyes")
+
+PKG_CHECK_MODULES([libsigrok], [libsigrok >= 0.2.0],
+ [have_libsigrok="yes";
+ LIBSIGROK_CFLAGS="$libsigrok_CFLAGS";
+ LIBSIGROK_LIBS="$libsigrok_LIBS"],
+ [have_libsigrok="no"])
+AM_CONDITIONAL(HAVE_LIBSIGROK, test x"$have_libsigrok" = "xyes")
+AC_SUBST([LIBSIGROK_CFLAGS])
+AC_SUBST([LIBSIGROK_LIBS])
+