8000 zephyr/Makefile: Automatically derive target-specific CFLAGS. · ptone/circuitpython@244b02f · GitHub
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pfalconpfalcon
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zephyr/Makefile: Automatically derive target-specific CFLAGS.
By tricking Zephyt arch Makefiles compute them for us (not just for Zephyr). This make potentially break as Zephyr evolves.
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2 files changed

+29
-9
lines changed

2 files changed

+29
-9
lines changed

‎zephyr/Makefile

Lines changed: 12 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -15,20 +15,18 @@ BOARD ?= qemu_x86
1515
# Zephyr 1.6.0
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OUTDIR_PREFIX = $(BOARD)
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18+
# Zephyr (generated) config files - must be defined before include below
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Z_DOTCONFIG = outdir/$(OUTDIR_PREFIX)/.config
20+
Z_AUTOCONF_H = outdir/$(OUTDIR_PREFIX)/include/generated/autoconf.h
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DQUOTE = "
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# "
21-
include $(Z_DOTCONFIG)
22-
override ARCH = $(subst $(DQUOTE),,$(CONFIG_ARCH))
23+
include z_config_proxy.mk
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2425
# Zephyr toolchain config is 2-pass, so included twice
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include $(ZEPHYR_BASE)/scripts/Makefile.toolchain.$(ZEPHYR_GCC_VARIANT)
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include $(ZEPHYR_BASE)/scripts/Makefile.toolchain.$(ZEPHYR_GCC_VARIANT)
2728

28-
CFLAGS_arm = -mthumb -mcpu=cortex-m3 -mabi=aapcs
29-
CFLAGS_x86 = -fno-asynchronous-unwind-tables -ffreestanding -fno-stack-protector \
30-
-fno-omit-frame-pointer -mpreferred-stack-boundary=2 -mno-sse -march=pentium
31-
CFLAGS_TARGET = $(CFLAGS_$(ARCH))
29+
CFLAGS_TARGET = $(cflags-y)
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3331
include ../py/mkenv.mk
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include ../py/py.mk
@@ -64,14 +62,19 @@ KCONFIG_TARGETS = config nconfig menuconfig xconfig gconfig
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$(GENERIC_TARGETS) $(KCONFIG_TARGETS): $(LIBMICROPYTHON)
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$(MAKE) -f Makefile.zephyr BOARD=$(BOARD) $@
6664

67-
Z_AUTOCONF_H = outdir/$(OUTDIR_PREFIX)/include/generated/autoconf.h
68-
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$(LIBMICROPYTHON): $(Z_AUTOCONF_H)
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build/genhdr/qstr.i.last: $(Z_AUTOCONF_H)
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7268
$(Z_AUTOCONF_H):
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rm -f $(LIBMICROPYTHON)
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-$(MAKE) -f Makefile.zephyr BOARD=$(BOARD)
7571

72+
zephyr_arch.mk: $(Z_DOTCONFIG)
73+
echo "include $(ZEPHYR_BASE)/arch/$(ARCH)/Makefile" >$@
74+
75+
z_config_proxy.mk:
76+
$(MAKE) -f Makefile.zephyr BOARD=$(BOARD) initconfig
77+
echo "include z_config.mk" >$@
78+
7679
# Clean Zephyr things too
77-
CLEAN_EXTRA = outdir
80+
CLEAN_EXTRA = outdir z_config_proxy.mk

‎zephyr/z_config.mk

Lines changed: 17 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,17 @@
1+
srctree = $(ZEPHYR_BASE)
2+
3+
include $(Z_DOTCONFIG)
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override ARCH = $(subst $(DQUOTE),,$(CONFIG_ARCH))
5+
SOC_NAME = $(subst $(DQUOTE),,$(CONFIG_SOC))
6+
SOC_SERIES = $(subst $(DQUOTE),,$(CONFIG_SOC_SERIES))
7+
SOC_FAMILY = $(subst $(DQUOTE),,$(CONFIG_SOC_FAMILY))
8+
ifeq ($(SOC_SERIES),)
9+
SOC_PATH = $(SOC_NAME)
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else
11+
SOC_PATH = $(SOC_FAMILY)/$(SOC_SERIES)
12+
endif
13+
14+
KBUILD_CFLAGS := -c
15+
include $(ZEPHYR_BASE)/scripts/Kbuild.include
16+
17+
include $(ZEPHYR_BASE)/arch/$(ARCH)/Makefile

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