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scripts/kernel-doc: Fix build time warnings

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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
This commit is contained in:
André Almeida 2024-10-10 19:59:33 -03:00 committed by Jonathan Corbet
parent f7e1d19105
commit 82f5ee35d0
1 changed files with 1 additions and 1 deletions
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scripts/kernel-doc
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@ -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;