Re: [Qemu-devel] Re: [PATCHv2] configure: verify stdio.h

[Blue Swirl <blauwirbel@gmail.com>]

2010/1/26 Måns Rullgård <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/msg00417.html)
>> ), detect them early.
>>
>> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
>> Acked-by: Juan Quintela <quintela@trasno.org>
>>
>> ---
>>
>> changes from v1:
>>       removed leftover chunk
>>
>>  configure |   20 ++++++++++++++++++++
>>  1 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
>>      exit 1
>>  fi
>>
>> +# Check that stdio.h compiler is sane: some
>> +# mingw variants do not support %z %l that we rely on
>> +cat > $TMPC <<EOF
>> +#include <stddef.h>
>> +#include <stdio.h>
>> +size_t z = 1;
>> +long long ll = 2;
>> +int main(void) {
>> +  printf("z=%zd;ll=%lld;\n", z, ll);
>> +  return 0;
>> +}
>> +EOF
>> +
>> +if compile_prog && ($TMPE | grep "z=1;ll=2;" > /dev/null); then
>> +  : C compiler works ok
>> +else
>> +    echo "ERROR: \"$cc\" does not have a working stdio.h"
>> +    exit 1
>> +fi
>> +
>>  check_define() {
>>  cat > $TMPC <<EOF
>>  #if !defined($1)
>
> This makes cross-compiling impossible.  Is that really desirable?

I'd rather drop %ll and %z.