From: André Almeida <andrealmeid@igalia.com>
Date: Thu, 10 Oct 2024 22:59:33 +0000 (-0300)
Subject: scripts/kernel-doc: Fix build time warnings
X-Git-Tag: v6.13-rc1~170^2~39
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=82f5ee35d0b960c54370a72418b9ec0dca382262;p=thirdparty%2Flinux.git

scripts/kernel-doc: Fix build time warnings

As stated at Documentation/kbuild/llvm.rst, to make usage of ccache one
must set KBUILD_BUILD_TIMESTAMP=''. Setting this together with W=1
will trigger the following warning for every compiled file:

  date: invalid date ‘+%s’

This comes from kernel-doc script, that produces the following command
when KBUILD_BUILD_TIMESTAMP is empty:

  date -d"" +%s

That triggers the warning above. Add a space between the flag `-d` and
the string argument to fix date command and remove the warning.

Signed-off-by: André Almeida <andrealmeid@igalia.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20241010225933.166436-1-andrealmeid@igalia.com
---

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 2791f81952038..8728f9824c65a 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -160,7 +160,7 @@ my @export_file_list;
 
 my @build_time;
 if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
-    (my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
+    (my $seconds = `date -d "${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
     @build_time = gmtime($seconds);
 } else {
     @build_time = localtime;