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

[Måns Rullgård]

"Michael S. Tsirkin" <address@hidden> writes:

> Verify that stdio.h supports %lld %zd.
> Some migw variants don't unless requested explicitly (see
> http://www.mail-archive.com/address@hidden/msg00417.html)
> ), detect them early.
>
> Signed-off-by: Michael S. Tsirkin <address@hidden>
> Acked-by: Juan Quintela <address@hidden>
>
> ---
>
> 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?

-- 
Måns Rullgård
address@hidden