GNU Makefile have two flavors of variables, recursively expanded that is defined by using '=', and simply expanded that is defined by using ':='.
The bug is caused by using recursively expanded flavor for BIN and SREC. As you can see below, they are prepended by $(obj) twice.
We can reproduce this bug with a simplified version of this Makefile: $ cat > Makefile <<EOF obj := /path/to/obj/ ELF := hello_world
BIN_rec = $(addsuffix .bin,$(ELF)) # recursively expanded BIN_sim := $(addsuffix .bin,$(ELF)) # simply expanded
ELF := $(addprefix $(obj),$(ELF)) BIN_rec := $(addprefix $(obj),$(BIN_rec)) BIN_sim := $(addprefix $(obj),$(BIN_sim))
show: @echo BIN_rec=$(BIN_rec) @echo BIN_sim=$(BIN_sim)
.PHONY: show EOF $ make show BIN_rec=/path/to/obj//path/to/obj/hello_world.bin BIN_sim=/path/to/obj/hello_world.bin
Signed-off-by: Che-Liang Chiou clchiou@chromium.org ---
examples/standalone/Makefile | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/examples/standalone/Makefile b/examples/standalone/Makefile index c1dfdce..6fd9f5d 100644 --- a/examples/standalone/Makefile +++ b/examples/standalone/Makefile @@ -45,8 +45,8 @@ ELF-oxc += eepro100_eeprom # ELF := $(strip $(ELF-y) $(ELF-$(ARCH)) $(ELF-$(BOARD)) $(ELF-$(CPU)))
-SREC = $(addsuffix .srec,$(ELF)) -BIN = $(addsuffix .bin,$(ELF)) +SREC := $(addsuffix .srec,$(ELF)) +BIN := $(addsuffix .bin,$(ELF))
COBJS := $(ELF:=.o)