Don't force -O2.
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ PMPATH2  = /usr/lib64/pm-utils/sleep.d
 PMPATHD  = /usr/lib/systemd/system-sleep
 
 PKG_CONFIG ?= pkg-config
-CFLAGS  += -O2 -I. -Wall $(shell ${PKG_CONFIG} --cflags glib-2.0)  -Wno-stringop-truncation -Wmissing-prototypes -Wmissing-declarations -Wformat-security # -DNOPERFEVENT   # -DHTTPSTATS
+CFLAGS  += -I. -Wall $(shell ${PKG_CONFIG} --cflags glib-2.0)  -Wno-stringop-truncation -Wmissing-prototypes -Wmissing-declarations -Wformat-security # -DNOPERFEVENT   # -DHTTPSTATS
 LDFLAGS += $(shell ${PKG_CONFIG} --libs glib-2.0)
 OBJMOD0  = version.o
 OBJMOD1  = various.o  deviate.o   procdbase.o