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Date: Mon, 22 Mar 2010 09:31:09 +0100
From: Stefan Weil <weil@mail.berlios.de>
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Subject: Re: [Qemu-devel] Build always fail on x86_32 host for i386_softmmu
	target
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To: Bruce Majia <bruce.majia@gmail.com>
Cc: qemu-devel@nongnu.org

Bruce Majia schrieb:
> Hi,
>
> When I built qemu on my x86_32 host with following configure line:
>
> $ ./configure --prefix=/usr/local/qemus/master \
> --target-list=i386-softmmu
> $ make
>
> The build will always fail with message:
> ----------------------------------------
> ...
> CC i386-softmmu/fpu/softfloat-native.o
> /mnt/farm/my_repo/qemu/fpu/softfloat-native.c:130:5: error:
> "HOST_LONG_BITS" is not defined
> make[1]: *** [fpu/softfloat-native.o] Error 1
> make: *** [subdir-i386-softmmu] Error 2
> ----------------------------------------
>
> Is this a known issue or something wrong with my configure line?
>
> Though I can make it work with a minor nasty patch:
> ==============
> diff --git a/fpu/softfloat-native.c b/fpu/softfloat-native.c
> index 049c830..5ba5013 100644
> --- a/fpu/softfloat-native.c
> +++ b/fpu/softfloat-native.c
> @@ -127,6 +127,9 @@ floatx80 int64_to_floatx80( int64_t v STATUS_PARAM)
> #endif
>
> /* XXX: this code implements the x86 behaviour, not the IEEE one. */
> +#ifndef HOST_LONG_BITS
> +#define HOST_LONG_BITS 32
> +#endif
> #if HOST_LONG_BITS == 32
> static inline int long_to_int32(long a)
> {
> ==============
>
> I thought it may necessary to ask if something wrong with above hack.
> And can we get the problem fixed properly?
>
> Thanks.
> -b

I had this problem with incremental builds several times, too.
A new make from scratch (all generated files removed) always worked,
so I don't think your patch is needed.

Regards,
Stefan