$OpenBSD: patch-build_Makefile_in,v 1.5 2019/01/04 09:27:09 pascal Exp $
Index: build/Makefile.in
--- build/Makefile.in.orig
+++ build/Makefile.in
@@ -38,7 +38,7 @@ MASTDIR   = @mastdir@
 
 PKGCONFIGDIR = @prefix@/share/pkgconfig
 
-CFLAGS    = @cflags@ @ccdef@MVM_TRACING=$(TRACING) @ccdef@MVM_CGOTO=$(CGOTO) @ccdef@MVM_RDTSCP=$(RDTSCP)
+CFLAGS    += @cflags@ @ccdef@MVM_TRACING=$(TRACING) @ccdef@MVM_CGOTO=$(CGOTO) @ccdef@MVM_RDTSCP=$(RDTSCP)
 CINCLUDES = @cincludes@ \
             @ccinc@@shaincludedir@ \
             @ccinc@3rdparty/tinymt \
