Index: net/haproxy/Makefile
===================================================================
--- net/haproxy/Makefile	(revision 504754)
+++ net/haproxy/Makefile	(working copy)
@@ -21,12 +21,13 @@
 		USE_ZLIB=1 USE_CPU_AFFINITY=1 USE_ACCEPT4=1 \
 		CC="${CC}" DEBUG_CFLAGS="" CPU_CFLAGS="${CFLAGS}"
 
-OPTIONS_DEFINE=		DOCS EXAMPLES LUA OPENSSL DEVICEATLAS
+OPTIONS_DEFINE=		DOCS EXAMPLES LUA OPENSSL DEVICEATLAS PROMEX
 OPTIONS_RADIO=		PCRE
 OPTIONS_RADIO_PCRE=	DPCRE SPCRE
 DPCRE_DESC=		Link dynamically
 SPCRE_DESC=		Link statically
 DEVICEATLAS_DESC=	DeviceAtlas Device Detection support
+PROMEX_DESC=		Enable Prometheus exporter
 OPTIONS_DEFAULT=	SPCRE OPENSSL
 
 DPCRE_LIB_DEPENDS=	libpcre.so:devel/pcre
@@ -35,6 +36,7 @@
 SPCRE_MAKE_ARGS=	USE_PCRE=1 USE_STATIC_PCRE=1 USE_PCRE_JIT=1
 DEVICEATLAS_LIB_DEPENDS=	libda.so:net/deviceatlas-enterprise-c
 DEVICEATLAS_MAKE_ARGS=		USE_DEVICEATLAS=1 DEVICEATLAS_LIB=${LOCALBASE}/lib DEVICEATLAS_INC=${LOCALBASE}/include
+PROMEX_MAKE_ARGS=	EXTRA_OBJS="contrib/prometheus-exporter/service-prometheus.o"
 OPENSSL_USES=		ssl
 OPENSSL_MAKE_ARGS=	USE_OPENSSL=1 SSL_LIB=${OPENSSLLIB} SSL_INC=${OPENSSLINC}
 LUA_USES=		lua:53