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build: define CPU only when arch/${ARCH}/cpu/${CPU} exists

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The directory arch/${ARCH}/cpu/${CPU} does not exist
in avr32, blackfin, microblaze, nios2, openrisc, sandbox, x86.

These architectures have only one CPU type.
Defining CPU should not be required for such architectures.

This commit allows cpu field (= the 3rd field of boards.cfg)
to be kept blank.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Andreas Bießmann <andreas.devel@googlemail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Sonic Zhang <sonic.zhang@analog.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Thomas Chou <thomas@wytron.com.tw>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
This commit is contained in:
Masahiro Yamada
2014-06-24 22:10:52 +09:00
committed by Tom Rini
parent d1db76f149
commit a8b0f9b685
5 changed files with 62 additions and 60 deletions
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5
config.mk
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@@ -24,10 +24,7 @@ OBJCOPYFLAGS :=
# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
# CPU-specific code.
CPUDIR=arch/$(ARCH)/cpu/$(CPU)
ifneq ($(srctree)/$(CPUDIR),$(wildcard $(srctree)/$(CPUDIR)))
CPUDIR=arch/$(ARCH)/cpu
endif
CPUDIR=arch/$(ARCH)/cpu$(if $(CPU),/$(CPU),)
sinclude $(srctree)/arch/$(ARCH)/config.mk # include architecture dependend rules
sinclude $(srctree)/$(CPUDIR)/config.mk # include CPU specific rules