gentoo-overlay/media-sound/linuxsampler/files/linuxsampler-2.0.0-lv2-automagic.patch

--- linuxsampler-2.0.0/configure.ac
+++ linuxsampler-2.0.0/configure.ac
@@ -532,12 +532,12 @@
 AM_CONDITIONAL(HAVE_DSSI, test $config_have_dssi = "yes")
 
 # LV2
-PKG_CHECK_MODULES(LV2, lv2 >= 1.0.0, config_have_lv2="yes", config_have_lv2="no")
-if test "$config_have_lv2" != "yes"; then
-    PKG_CHECK_MODULES(LV2, lv2core >= 1.0.0, config_have_lv2="yes", config_have_lv2="no")
-fi
-AC_SUBST(LV2_CFLAGS)
-AC_SUBST(LV2_LIBS)
+AC_ARG_ENABLE([lv2],
+	AS_HELP_STRING([--enable-lv2], [Enable building with lv2]))
+config_have_lv2="no"
+AS_IF([test "x$enable_lv2" = "xyes"], [
+	PKG_CHECK_MODULES([LV2], [lv2 >= 1.0.0 lv2core >= 1.0.0], [config_have_lv2="yes"])
+])
 AM_CONDITIONAL(HAVE_LV2, test $config_have_lv2 = "yes")
 
 # VST