linux-kernel - Re: [PATCH v2 3/8] drm/xe: xe_gen_wa_oob: fix program_invocation_short

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Message-ID: <CAK7LNAQDxVGOa5g3f_dqZ5nD_u8_a++T+ussL+AWuOXs-XOsow@mail.gmail.com>
Date: Fri, 6 Sep 2024 23:39:18 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: da.gomez@...sung.com
Cc: Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
	Lucas De Marchi <lucas.demarchi@...el.com>, 
	Thomas Hellström <thomas.hellstrom@...ux.intel.com>, 
	Rodrigo Vivi <rodrigo.vivi@...el.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
	William Hubbs <w.d.hubbs@...il.com>, Chris Brannon <chris@...-brannons.com>, 
	Kirk Reiser <kirk@...sers.ca>, Samuel Thibault <samuel.thibault@...-lyon.org>, 
	Paul Moore <paul@...l-moore.com>, Stephen Smalley <stephen.smalley.work@...il.com>, 
	Ondrej Mosnacek <omosnace@...hat.com>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>, 
	James Morse <james.morse@....com>, Suzuki K Poulose <suzuki.poulose@....com>, 
	Zenghui Yu <yuzenghui@...wei.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Jiri Slaby <jirislaby@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, 
	Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
	Simona Vetter <simona.vetter@...ll.ch>, linux-kernel@...r.kernel.org, 
	linux-kbuild@...r.kernel.org, intel-xe@...ts.freedesktop.org, 
	dri-devel@...ts.freedesktop.org, speakup@...ux-speakup.org, 
	selinux@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	kvmarm@...ts.linux.dev, linux-serial@...r.kernel.org, llvm@...ts.linux.dev, 
	Finn Behrens <me@...enk.dev>, "Daniel Gomez (Samsung)" <d+samsung@...ces.com>, gost.dev@...sung.com
Subject: Re: [PATCH v2 3/8] drm/xe: xe_gen_wa_oob: fix program_invocation_short_name
 for macos

On Fri, Sep 6, 2024 at 8:01 PM Daniel Gomez via B4 Relay
<devnull+da.gomez.samsung.com@...nel.org> wrote:
>
> From: Daniel Gomez <da.gomez@...sung.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@...sung.com>
> Reviewed-by: Lucas De Marchi <lucas.demarchi@...el.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.









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,








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;
        }








-- 
Best Regards
Masahiro Yamada