Re: [PATCH gwproxy v1 1/2] log: Fix missing `gettid()` syscall on older glibc version

[Ammar Faizi <ammarfaizi2@gnuweeb.org>]

On Fri, Aug 01, 2025 at 05:05:45AM +0700, Alviro Iskandar Setiawan wrote:
> diff --git a/src/gwproxy/log.c b/src/gwproxy/log.c
> index 95d1930..574c5e0 100644
> --- a/src/gwproxy/log.c
> +++ b/src/gwproxy/log.c
> @@ -1,5 +1,6 @@
>  #include <gwproxy/common.h>
>  #include <gwproxy/log.h>
> +#include <gwproxy/syscall.h>
>  #include <time.h>
>  #include <stdlib.h>
>  #include <stdio.h>
> @@ -7,6 +8,11 @@
>  #include <unistd.h>
>  #include <stdarg.h>
>  
> +static inline pid_t __sys_gettid(void)
> +{
> +	return (pid_t)__do_syscall0(__NR_gettid);
> +}

You can't use __do_syscall0() macro because it's only defined on
x86-64. This breaks powerpc64 build and other architectures:

  src/gwproxy/log.c: In function ‘__sys_gettid’:
  src/gwproxy/log.c:13:23: warning: implicit declaration of function ‘__do_syscall0’ [-Wimplicit-function-declaration]
     13 |         return (pid_t)__do_syscall0(__NR_gettid);
        |                       ^~~~~~~~~~~~~

-- 
Ammar Faizi