Re: lib/malloca.c: warning about [-Wsign-compare]

[Paul Eggert]

On 9/21/22 14:42, Bjarni Ingi Gislason wrote:

> you do not say for what you want (need) all this data.

We need a reproducer to figure out what is causing the problem. Perhaps 
the problem involves something going wrong and generating the wrong 
config.h or Makefile. If so, what is it?


>    If your are seeking a reproducer this works for me:
>
>    Compilation in your gnulib directory:
>
> clang -I . -Wsign-compare -c lib/malloca.c
>
> with ./config.h coming from the attachment (compressed file).

Sorry, that's not a reproducer. First, if the problem is that the 
config.h is wrong, this won't tell us why config.h went wrong. Second, 
if the problem is in the Makefile this won't show it to us. Third, even 
if I simply put that config.h in my gnulib directory and run that 
command, it won't compile for me (Fedora 36 x86-64, which has clang 
14.0.5 (Fedora 14.0.5-1.fc36)):

$ clang -I . -Wsign-compare -c lib/malloca.c
lib/malloca.c:24:10: fatal error: 'stdckdint.h' file not found
#include <stdckdint.h>
         ^~~~~~~~~~~~~

We need a complete reproducer from scratch, not just dribs and drabs. If 
it's too much work for you to generate one that's OK, we can wait until 
someone else runs into the issue, whatever it is.

Here's the shell command that I used to try to reproduce the problem on 
Fedora 36 x86-64, from a fresh Gnulib checkout. This shell command 
succeeded for me. Can you alter this recipe so that I can easily 
reproduce the problem with an altered recipe, so that the test fails?

  CC=clang ./gnulib-tool --test malloca