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 <clch...@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)
--
1.7.3.1
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