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Re: [Tinycc-devel] sizeof("string literal") is very wrong ~ On ARM or Ap
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From: |
Vincent Lefevre |
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Subject: |
Re: [Tinycc-devel] sizeof("string literal") is very wrong ~ On ARM or Apple Silicon |
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Date: |
Fri, 5 Aug 2022 10:50:57 +0200 |
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User-agent: |
Mutt/2.2.6+34 (76e93dd3) vl-149028 (2022-07-31) |
On 2022-08-05 09:22:42 +0200, Karl Yerkes wrote:
> That did not help. It seems that there is a problem on ARM or Apple
> Silicon, specifically:
>
> #include <stdio.h>
> int main() {
> printf("%%lu: %lu\n", sizeof("this is a string"));
> printf("%%d: %d\n", sizeof("this is a string"));
> printf("%%zu: %zu\n", sizeof("this is a string"));
> }
In any case, this code has undefined behavior. Just use %zu,
nothing else.
That said, if size_t has the same size as unsigned long, the first
line should have probably been correct in practice, and
> $ tcc tcc-string-literal-sizeof.c
> FIXME: handle reloc type 9 at 1052 [0x60000155c032] to 1050
may be an issue with tcc (though this is conform to the standard).
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)