Re: [PATCH for-next] configure: probe for gcc -m32 integer sizes

[Jan Beulich <jbeulich@xxxxxxxx>]

On 24.02.2021 02:08, Stefano Stabellini wrote:
> --- a/tools/configure.ac
> +++ b/tools/configure.ac
> @@ -307,6 +307,12 @@ AC_ARG_VAR([AWK], [Path to awk tool])
>  
>  # Checks for programs.
>  AC_PROG_CC
> +AC_LANG(C)
> +AC_LANG_CONFTEST([AC_LANG_SOURCE([[#include <stdint.h>
> +#define BUILD_BUG_ON(p) ((void)sizeof(char[1 - 2 * !!(p)]))
> +int main() { BUILD_BUG_ON(sizeof(uint64_t) != 8); }]])])
> +AS_IF([gcc -m32 -c conftest.c -o /dev/null 2>/dev/null], [hvmloader=y], 
> [AC_MSG_WARN(hvmloader build disabled due to headers mismatch)])
> +AC_SUBST(hvmloader)
>  AC_PROG_MAKE_SET
>  AC_PROG_INSTALL
>  AC_PATH_PROG([FLEX], [flex])

I'm fine with the approach now, but I'm rather uncertain about
the insertion point you've selected (in the middle of the
"Checks for programs" section). It'll need to be the tools
maintainers to judge about this.

Jan