Index: mail/rspamd/Makefile
===================================================================
--- mail/rspamd/Makefile	(revision 516896)
+++ mail/rspamd/Makefile	(working copy)
@@ -28,10 +28,11 @@
 USERS=		rspamd
 GROUPS=		rspamd
 
-OPTIONS_DEFINE=		CGP GPERF
+OPTIONS_DEFINE=		BLAS CGP GPERF
 OPTIONS_DEFINE_amd64=	HYPERSCAN
 OPTIONS_SUB=	yes
 
+BLAS_DESC=		Use OpenBLAS to accelerate KANN
 CGP_DESC=		Install Communigate Pro(tm) helper
 GPERF_DESC=		Google perf-tools profiling
 HYPERSCAN_DESC=		Use hyperscan optimizations (amd64 only)
@@ -52,6 +53,9 @@
 
 USE_RC_SUBR=	rspamd
 
+BLAS_CMAKE_ON=	-DENABLE_BLAS=ON
+BLAS_USES=	blaslapack:openblas
+
 GPERF_CMAKE_ON=	-DENABLE_GPERF_TOOLS=ON
 GPERF_LIB_DEPENDS=	libprofiler.so:devel/google-perftools