make htmldocs has below warnings:
..
Variable length lookbehind is experimental in regex;
marked by <-- HERE in m/(?<=^|\s)-Werror(?=$|\s)
<-- HERE / at ./scripts/kernel-doc line 188.
...
"-Werror" option in make command,
needs "-Werror" to have space before
and after while running make command,
hence space checking is sepratly done,
and is not part of lookbehind regular expression.
Below command also didn't
show any error:
make KCFLAGS="-Werror=return-type" W=1 kernel/fork.o
Fixes: 91f950e8b9d8 ("scripts/kernel-doc: match -Werror flag strictly")
Signed-off-by: Swarup Laxman Kotiaklapudi <swarupkotikalapudi@xxxxxxxxx>
---
scripts/kernel-doc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index d660e1f4b483..aa9e3e198d12 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -185,7 +185,7 @@ if (defined($ENV{'KBUILD_VERBOSE'}) && $ENV{'KBUILD_VERBOSE'} =~ '1') {
if (defined($ENV{'KCFLAGS'})) {
my $kcflags = "$ENV{'KCFLAGS'}";
- if ($kcflags =~ /(?<=^|\s)-Werror(?=$|\s)/) {
+ if ($kcflags =~ /(?<=^|)(\s)-Werror(?=$|)(\s)/) {
$Werror = 1;
}
}
--
2.34.1
