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Re: [PATCH for-next] configure: probe for gcc -m32 integer sizes
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Wed, 24 Feb 2021 11:20:47 +0100
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On Tue, Feb 23, 2021 at 05:08:43PM -0800, Stefano Stabellini wrote:
> The hvmloader build on Alpine Linux x86_64 currenly fails:
>
>
> hvmloader.c: In function 'init_vm86_tss':
> hvmloader.c:202:39: error: left shift count >= width of type
> [-Werror=shift-count-overflow]
> 202 | ((uint64_t)TSS_SIZE << 32) | virt_to_phys(tss));
>
> util.c: In function 'get_cpu_mhz':
> util.c:824:15: error: conversion from 'long long unsigned int' to 'uint64_t'
> {aka 'long unsigned int'} changes value from
> '4294967296000000' to '0' [-Werror=overflow]
> 824 | cpu_khz = 1000000ull << 32;
>
>
> The root cause of the issue is that gcc -m32 picks up headers meant for
> 64-bit builds.
I'm working on getting hvmloader to build standalone without using any
system headers, which I think it's a worthwhile change to do rather
than this configure bodge. Will post the series now.
Thanks, Roger.
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