From 7b00d4a90af1d7bff50833ffe1216cf59592353a Mon Sep 17 00:00:00 2001 From: Andre Heider Date: Wed, 18 Jan 2023 22:42:28 +0100 Subject: [PATCH] Add BPF_LDFLAGS to allow overwriting llc's -march argument The argument to clang's -target isn't necessarily the same as to llc's -march. Analogue to BPF_CFLAGS, introduce BPF_LDFLAGS to allow e.g.: BPF_TARGET="mipsel-linux-gnu" BPF_LDFLAGS="-march=bpfel -mcpu=v3" Signed-off-by: Andre Heider --- configure | 2 ++ lib/common.mk | 2 +- lib/libxdp/Makefile | 2 +- 3 files changed, 4 insertions(+), 2 deletions(-) --- a/configure +++ b/configure @@ -17,10 +17,12 @@ check_opts() : ${DYNAMIC_LIBXDP:=0} : ${MAX_DISPATCHER_ACTIONS:=10} : ${BPF_TARGET:=bpf} + : ${BPF_LDFLAGS:=-march=$(BPF_TARGET)} echo "PRODUCTION:=${PRODUCTION}" >>$CONFIG echo "DYNAMIC_LIBXDP:=${DYNAMIC_LIBXDP}" >>$CONFIG echo "MAX_DISPATCHER_ACTIONS:=${MAX_DISPATCHER_ACTIONS}" >>$CONFIG echo "BPF_TARGET:=${BPF_TARGET}" >>$CONFIG + echo "BPF_LDFLAGS:=${BPF_LDFLAGS}" >>$CONFIG } find_tool() --- a/lib/common.mk +++ b/lib/common.mk @@ -115,7 +115,7 @@ $(XDP_OBJ): %.o: %.c $(KERN_USER_H) $(EX -Werror \ $(BPF_CFLAGS) \ -O2 -emit-llvm -c -g -o ${@:.o=.ll} $< - $(QUIET_LLC)$(LLC) -march=$(BPF_TARGET) -filetype=obj -o $@ ${@:.o=.ll} + $(QUIET_LLC)$(LLC) $(BPF_LDFLAGS) -filetype=obj -o $@ ${@:.o=.ll} .PHONY: man ifeq ($(EMACS),) --- a/lib/libxdp/Makefile +++ b/lib/libxdp/Makefile @@ -146,7 +146,7 @@ $(XDP_OBJS): %.o: %.c $(BPF_HEADERS) $(L -Werror \ $(BPF_CFLAGS) \ -O2 -emit-llvm -c -g -o ${@:.o=.ll} $< - $(QUIET_LLC)$(LLC) -march=$(BPF_TARGET) -filetype=obj -o $@ ${@:.o=.ll} + $(QUIET_LLC)$(LLC) $(BPF_LDFLAGS) -filetype=obj -o $@ ${@:.o=.ll} .PHONY: man ifeq ($(EMACS),)