From mboxrd@z Thu Jan  1 00:00:00 1970
From: Heiko Schocher <hs@denx.de>
Date: Mon, 20 Mar 2017 07:41:45 +0100
Subject: [U-Boot] building cross_tools,
 _POSIX_C_SOURCE and _XOPEN_SOURCE are redefined
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Hello Robert,

Am 15.03.2017 um 09:02 schrieb Robert P. J. Day:
>
>    to build cross_tools, i ran:
>
>    $ make sandbox_defconfig
>    $ make cross_tools
>
> and while it appeared to work, i got:
>
> ... snip ...
>
> LDFLAGS="" python ./lib/libfdt/setup.py \
> 	"-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer    -DCONFIG_FIT_SIGNATURE -include ./include/libfdt_env.h -idirafterinclude -idirafter./arch/sandbox/include -I./lib/libfdt -I./tools -DUSE_HOSTCC -D__KERNEL_STRICT_NAMES -D_GNU_SOURCE " lib/libfdt/fdt.c lib/libfdt/fdt_ro.c lib/libfdt/fdt_rw.c lib/libfdt/fdt_strerror.c lib/libfdt/fdt_wip.c lib/libfdt/fdt_region.c lib/libfdt/fdt_sw.c tools/libfdt_wrap.c
> In file included from /usr/include/python2.7/pyconfig.h:6:0,
>                   from /usr/include/python2.7/Python.h:8,
>                   from tools/libfdt_wrap.c:143:
> /usr/include/python2.7/pyconfig-64.h:1203:0: warning: "_POSIX_C_SOURCE" redefined
>   #define _POSIX_C_SOURCE 200112L
>   ^
> In file included from /usr/include/stdint.h:25:0,
>                   from /usr/lib/gcc/x86_64-redhat-linux/5.3.1/include/stdint.h:9,
>                   from ././include/compiler.h:19,
>                   from ././include/libfdt_env.h:12,
>                   from <command-line>:0:
> /usr/include/features.h:225:0: note: this is the location of the previous definition
>   # define _POSIX_C_SOURCE 200809L
>   ^
> In file included from /usr/include/python2.7/pyconfig.h:6:0,
>                   from /usr/include/python2.7/Python.h:8,
>                   from tools/libfdt_wrap.c:143:
> /usr/include/python2.7/pyconfig-64.h:1225:0: warning: "_XOPEN_SOURCE" redefined
>   #define _XOPEN_SOURCE 600
>   ^
> In file included from /usr/include/stdint.h:25:0,
>                   from /usr/lib/gcc/x86_64-redhat-linux/5.3.1/include/stdint.h:9,
>                   from ././include/compiler.h:19,
>                   from ././include/libfdt_env.h:12,
>                   from <command-line>:0:
> /usr/include/features.h:166:0: note: this is the location of the previous definition
>   # define _XOPEN_SOURCE 700
>   ^
>
>
>    not sure if that concerns anyone enough to want to tweak it.

I stumbled also over this, but did not find time to look into it...

So, if you have time for fixing it, that would be nice ;-)

bye,
Heiko
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