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From: Blue Swirl <blauwirbel@gmail.com>
Date: Tue, 26 Jan 2010 21:31:12 +0200
Message-ID: <f43fc5581001261131o781b0ab7l9ca497902748f81d@mail.gmail.com>
Subject: Re: [Qemu-devel] Re: [PATCHv2] configure: verify stdio.h
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To: =?UTF-8?B?TcOlbnMgUnVsbGfDpXJk?= <mans@mansr.com>
Cc: qemu-devel@nongnu.org

2010/1/26 M=C3=A5ns Rullg=C3=A5rd <mans@mansr.com>:
> "Michael S. Tsirkin" <mst@redhat.com> writes:
>
>> Verify that stdio.h supports %lld %zd.
>> Some migw variants don't unless requested explicitly (see
>> http://www.mail-archive.com/mingw-w64-public@lists.sourceforge.net/msg00=
417.html)
>> ), detect them early.
>>
>> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
>> Acked-by: Juan Quintela <quintela@trasno.org>
>>
>> ---
>>
>> changes from v1:
>> =C2=A0 =C2=A0 =C2=A0 removed leftover chunk
>>
>> =C2=A0configure | =C2=A0 20 ++++++++++++++++++++
>> =C2=A01 files changed, 20 insertions(+), 0 deletions(-)
>>
>> diff --git a/configure b/configure
>> index 5631bbb..6ba06d6 100755
>> --- a/configure
>> +++ b/configure
>> @@ -123,6 +123,26 @@ else
>> =C2=A0 =C2=A0 =C2=A0exit 1
>> =C2=A0fi
>>
>> +# Check that stdio.h compiler is sane: some
>> +# mingw variants do not support %z %l that we rely on
>> +cat > $TMPC <<EOF
>> +#include <stddef.h>
>> +#include <stdio.h>
>> +size_t z =3D 1;
>> +long long ll =3D 2;
>> +int main(void) {
>> + =C2=A0printf("z=3D%zd;ll=3D%lld;\n", z, ll);
>> + =C2=A0return 0;
>> +}
>> +EOF
>> +
>> +if compile_prog && ($TMPE | grep "z=3D1;ll=3D2;" > /dev/null); then
>> + =C2=A0: C compiler works ok
>> +else
>> + =C2=A0 =C2=A0echo "ERROR: \"$cc\" does not have a working stdio.h"
>> + =C2=A0 =C2=A0exit 1
>> +fi
>> +
>> =C2=A0check_define() {
>> =C2=A0cat > $TMPC <<EOF
>> =C2=A0#if !defined($1)
>
> This makes cross-compiling impossible. =C2=A0Is that really desirable?

I'd rather drop %ll and %z.