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tools/env: cross-compile fw_printenv without setting HOSTCC

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fw_printenv is a program which mostly runs on the target Linux.

Before switching to Kbuild, we needed to set HOSTCC at the
command line like this:
    make HOSTCC=<your CC cross-compiler> env

Going forward we can cross compile it by specifying CROSS_COMPILE:
    make CROSS_COMPILE=<your cross-compiler prefix> env
This looks more natural.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Tested-by: Gerhard Sittig <gsi@denx.de>
This commit is contained in:
Masahiro Yamada 2014-02-04 17:24:45 +09:00 committed by Tom Rini
parent 9a368d0f58
commit 79fc0c5f49
4 changed files with 18 additions and 7 deletions
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1
tools/.gitignore vendored
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@ -16,7 +16,6 @@
/xway-swap-bytes /xway-swap-bytes
/*.exe /*.exe
/easylogo/easylogo /easylogo/easylogo
/env/fw_printenv
/gdb/gdbcont /gdb/gdbcont
/gdb/gdbsend /gdb/gdbsend
/kernel-doc/docproc /kernel-doc/docproc

2
tools/env/.gitignore vendored Normal file
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@ -0,0 +1,2 @@
fw_printenv
fw_printenv_unstripped

17
tools/env/Makefile vendored
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@ -5,6 +5,11 @@
# SPDX-License-Identifier: GPL-2.0+ # SPDX-License-Identifier: GPL-2.0+
# #
# fw_printenv is supposed to run on the target system, which means it should be
# built with cross tools. Although it may look weird, we only replace "HOSTCC"
# with "CC" here for the maximum code reuse of scripts/Makefile.host.
HOSTCC = $(CC)
# Compile for a hosted environment on the target # Compile for a hosted environment on the target
HOST_EXTRACFLAGS = $(patsubst -I%,-idirafter%, $(UBOOTINCLUDE)) \ HOST_EXTRACFLAGS = $(patsubst -I%,-idirafter%, $(UBOOTINCLUDE)) \
-idirafter $(SRCTREE)/tools/env \ -idirafter $(SRCTREE)/tools/env \
@ -15,9 +20,15 @@ ifeq ($(MTD_VERSION),old)
HOST_EXTRACFLAGS += -DMTD_OLD HOST_EXTRACFLAGS += -DMTD_OLD
endif endif
hostprogs-y := fw_printenv always := fw_printenv
always := $(hostprogs-y) hostprogs-y := fw_printenv_unstripped
fw_printenv-objs := fw_env.o fw_env_main.o \ fw_printenv_unstripped-objs := fw_env.o fw_env_main.o \
crc32.o ctype.o linux_string.o \ crc32.o ctype.o linux_string.o \
env_attr.o env_flags.o env_attr.o env_flags.o
quiet_cmd_strip = STRIP $@
cmd_strip = $(STRIP) -o $@ $<
$(obj)/fw_printenv: $(obj)/fw_printenv_unstripped FORCE
$(call if_changed,strip)

5
tools/env/README vendored
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@ -2,11 +2,10 @@
This is a demo implementation of a Linux command line tool to access This is a demo implementation of a Linux command line tool to access
the U-Boot's environment variables. the U-Boot's environment variables.
In the current version, there is an issue in cross-compilation.
In order to cross-compile fw_printenv, run In order to cross-compile fw_printenv, run
make HOSTCC=<your CC cross-compiler> env make CROSS_COMPILE=<your cross-compiler prefix> env
in the root directory of the U-Boot distribution. For example, in the root directory of the U-Boot distribution. For example,
make HOSTCC=arm-linux-gcc env make CROSS_COMPILE=arm-linux- env
For the run-time utility configuration uncomment the line For the run-time utility configuration uncomment the line
#define CONFIG_FILE "/etc/fw_env.config" #define CONFIG_FILE "/etc/fw_env.config"