diff --color -ru a/Make.Rules b/Make.Rules
--- a/Make.Rules	2021-02-05 06:52:17.000000000 +0100
+++ b/Make.Rules	2021-12-13 17:09:11.225308225 +0100
@@ -56,10 +56,10 @@
 
 CC := $(CROSS_COMPILE)gcc
 DEFINES := -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
-COPTS ?= -O2
+COPTS ?= $(RPM_OPT_FLAGS)
 CFLAGS ?= $(COPTS) $(DEFINES)
 BUILD_CC ?= $(CC)
-BUILD_COPTS ?= -O2
+BUILD_COPTS ?= $(RPM_OPT_FLAGS)
 BUILD_CFLAGS ?= $(BUILD_COPTS) $(DEFINES) $(IPATH)
 AR := $(CROSS_COMPILE)ar
 RANLIB := $(CROSS_COMPILE)ranlib
@@ -69,7 +69,7 @@
         -Wstrict-prototypes -Wmissing-prototypes \
         -Wnested-externs -Winline -Wshadow
 LD=$(CC) -Wl,-x -shared
-LDFLAGS ?= #-g
+LDFLAGS ?= $(RPM_LD_FLAGS)
 LIBCAPLIB := -L$(topdir)/libcap -lcap
 PSXLINKFLAGS :=  -lpthread -Wl,-wrap,pthread_create
 LIBPSXLIB := -L$(topdir)/libcap -lpsx $(PSXLINKFLAGS)
@@ -104,7 +104,7 @@
 
 ifeq ($(PTHREADS),yes)
 GO ?= go
-GOLANG ?= $(shell if [ -n "$(shell $(GO) version 2>/dev/null)" ]; then echo yes ; else echo no ; fi)
+GOLANG ?= no
 ifeq ($(GOLANG),yes)
 GOROOT ?= $(shell $(GO) env GOROOT)
 GOCGO ?= $(shell if [ "$(shell $(GO) env CGO_ENABLED)" = 1 ]; then echo yes ; else echo no ; fi)