Re: [PATCH v2 3/8] drm/xe: xe_gen_wa_oob: fix program_invocation_short_name for macos

[Daniel Gomez <da.gomez@samsung.com>]

On 9/6/2024 4:39 PM, Masahiro Yamada wrote:
> On Fri, Sep 6, 2024 at 8:01 PM Daniel Gomez via B4 Relay
> <devnull+da.gomez.samsung.com@kernel.org> wrote:
>>
>> From: Daniel Gomez <da.gomez@samsung.com>
>>
>> Use getprogname() [1] instead of program_invocation_short_name() [2]
>> for macOS hosts.
>>
>> [1]:
>> https://www.gnu.org/software/gnulib/manual/html_node/
>> program_005finvocation_005fshort_005fname.html
>>
>> [2]:
>> https://developer.apple.com/library/archive/documentation/System/
>> Conceptual/ManPages_iPhoneOS/man3/getprogname.3.html
>>
>> Fixes build error for macOS hosts:
>>
>> drivers/gpu/drm/xe/xe_gen_wa_oob.c:34:3: error: use of
>> undeclared identifier 'program_invocation_short_name'    34 |
>> program_invocation_short_name);       |                 ^ 1 error
>> generated.
>>
>> Signed-off-by: Daniel Gomez <da.gomez@samsung.com>
>> Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
>> ---
>>   drivers/gpu/drm/xe/xe_gen_wa_oob.c | 4 ++++
>>   1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/xe/xe_gen_wa_oob.c b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
>> index 904cf47925aa..0d933644d8a0 100644
>> --- a/drivers/gpu/drm/xe/xe_gen_wa_oob.c
>> +++ b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
>> @@ -8,6 +8,7 @@
>>   #include <errno.h>
>>   #include <stdbool.h>
>>   #include <stdio.h>
>> +#include <stdlib.h>
>>   #include <string.h>
>>
>>   #define HEADER \
>> @@ -30,6 +31,9 @@
>>
>>   static void print_usage(FILE *f)
>>   {
>> +#ifdef __APPLE__
>> +       const char *program_invocation_short_name = getprogname();
>> +#endif
>>          fprintf(f, "usage: %s <input-rule-file> <generated-c-source-file> <generated-c-header-file>\n",
>>                  program_invocation_short_name);
>>   }
>>
>> --
>> 2.46.0
>>
>>
> 
> 
> 
> Before adding such #ifdef, you should check how other programs do.
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> 
> Solution 1 : hard-code the program name
> 
> 
> diff --git a/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> index 106ee2b027f0..9e9a29e2cecf 100644
> --- a/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> +++ b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> @@ -30,8 +30,7 @@
> 
>   static void print_usage(FILE *f)
>   {
> -       fprintf(f, "usage: %s <input-rule-file>
> <generated-c-source-file> <generated-c-header-file>\n",
> -               program_invocation_short_name);
> +       fprintf(f, "usage: xe_gen_wa_oob <input-rule-file>
> <generated-c-source-file> <generated-c-header-file>\n");
>   }
> 
>   static void print_parse_error(const char *err_msg, const char *line,
> 
> 
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> 
> 
> Solution 2: use argv[0]
> 
> 
> diff --git a/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> index 106ee2b027f0..600c63e88e46 100644
> --- a/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> +++ b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
> @@ -28,10 +28,10 @@
>          "\n" \
>          "#endif\n"
> 
> -static void print_usage(FILE *f)
> +static void print_usage(FILE *f, const char *progname)
>   {
>          fprintf(f, "usage: %s <input-rule-file>
> <generated-c-source-file> <generated-c-header-file>\n",
> -               program_invocation_short_name);
> +               progname);
>   }
> 
>   static void print_parse_error(const char *err_msg, const char *line,
> @@ -136,7 +136,7 @@ int main(int argc, const char *argv[])
> 
>          if (argc < 3) {
>                  fprintf(stderr, "ERROR: wrong arguments\n");
> -               print_usage(stderr);
> +               print_usage(stderr, argv[0]);
>                  return 1;
>          }


This approach looks good to me. I will drop Lucas' tag in favor to this. 
Please, Lucas let me know if you disagree any of the proposals here or 
if you have any preference. Otherwise, I'll resend this with solution 2.



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