On Thu, Aug 1, 2013 at 10:21 AM, Jonas Bonn <jo...@southpole.se> wrote:
> Hi Gang,
>
> (Taking this off the Linux mailing list as it's an OpenRISC issue)
>
> Hi Toolchain-people!
>
> Don't we define __linux__ for the or32-*-linux-* target?  If not, shouldn't
> we?
>
> /Jonas
>
Mine does:

$ or32-linux-gcc -dM -E ~/empty.c -o -|grep __linux__
#define __linux__ 1

$ or32-linux-gcc -v
Using built-in specs.
COLLECT_GCC=or32-linux-gcc
COLLECT_LTO_WRAPPER=/home/stefan/openrisc/toolchain-or32-20120619/bin/../libexec/gcc/or32-linux/4.5.1-or32-1.0rc4/lto-wrapper
Target: or32-linux
Configured with: ../gcc-svn/configure --target=or32-linux
--prefix=/home/stefan/openrisc/toolchain --disable-libssp
--srcdir=../gcc-svn --enable-languages=c --enable-threads=posix
--disable-libgomp --disable-libmudflap
--with-sysroot=/home/stefan/openrisc/toolchain/or32-linux/sys-root
Thread model: posix
gcc version 4.5.1-or32-1.0rc4 (GCC)

FWIW, so does also or1k-linux-uclibc-gcc
$ or1k-linux-uclibc-gcc -dM -E ~/empty.c -o -|grep __linux__
#define __linux__ 1

That said, does it hurt to add the define to the kernel?
(I have in mind the fact that we currently can't build the kernel with the
or1k-linux-*- toolchain, but have to use or1k-elf-, which for obvious reasons
doesn't define __linux__)

> On 07/31/2013 05:34 AM, Chen Gang wrote:
>>
>> Need append "_D__linux__" to KBUILD_CFLAGS, just like some of another
>> architectures have done, or 'allmodconfig' can not pass compiling.
>>
>> The related error:
>>
>>      CC [M]  fs/coda/psdev.o
>>    In file included from include/linux/coda.h:65:0,
>>                     from fs/coda/psdev.c:45:
>>    include/uapi/linux/coda.h:221:2: error: expected
>> specifier-qualifier-list before 'u_quad_t'
>>
>> The related compiler information:
>>
>>    [root@dhcp122 ~]# /usr/local/bin/or32-linux-gcc -v
>>    Using built-in specs.
>>    COLLECT_GCC=/usr/local/bin/or32-linux-gcc
>>
>> COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/or32-linux/4.5.1-or32-1.0rc1/lto-wrapper
>>    Target: or32-linux
>>    Configured with: ../gcc-openrisc/configure --target=or32-linux
>> --disable-nls --enable-languages=c --without-headers --disable-shared
>> --disable-threads --enable-werror=no
>>    Thread model: single
>>    gcc version 4.5.1-or32-1.0rc1 (GCC)
>>
>>
>> Signed-off-by: Chen Gang <gang.c...@asianux.com>
>> ---
>>   arch/openrisc/Makefile |    2 +-
>>   1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/arch/openrisc/Makefile b/arch/openrisc/Makefile
>> index 4739b83..89076a6 100644
>> --- a/arch/openrisc/Makefile
>> +++ b/arch/openrisc/Makefile
>> @@ -24,7 +24,7 @@ OBJCOPYFLAGS    := -O binary -R .note -R .comment -S
>>   LDFLAGS_vmlinux :=
>>   LIBGCC                := $(shell $(CC) $(KBUILD_CFLAGS)
>> -print-libgcc-file-name)
>>
>> -KBUILD_CFLAGS  += -pipe -ffixed-r10
>> +KBUILD_CFLAGS  += -pipe -ffixed-r10 -D__linux__
>>
>>   ifeq ($(CONFIG_OPENRISC_HAVE_INST_MUL),y)
>>         KBUILD_CFLAGS += $(call cc-option,-mhard-mul)
>>
>
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