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scripts/tags.sh: Invoke 'realpath' via 'xargs' 

commit 7394d2ebb6 upstream.

When COMPILED_SOURCE is set, running

  make ARCH=x86_64 COMPILED_SOURCE=1 cscope tags

could throw the following errors:

scripts/tags.sh: line 98: /usr/bin/realpath: Argument list too long
cscope: no source files found
scripts/tags.sh: line 98: /usr/bin/realpath: Argument list too long
ctags: No files specified. Try "ctags --help".

This is most likely to happen when the kernel is configured to build a
large number of modules, which has the consequence of passing too many
arguments when calling 'realpath' in 'all_compiled_sources()'.

Let's improve this by invoking 'realpath' through 'xargs', which takes
care of properly limiting the argument list.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20220516234646.531208-1-cristian.ciocaltea@collabora.com
Cc: Carlos Llamas <cmllamas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Cristian Ciocaltea 2022-05-17 02:46:46 +03:00 committed by Greg Kroah-Hartman
parent 06740b433d
commit 1aee4ab2c1
1 changed files with 7 additions and 4 deletions
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11
scripts/tags.sh
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@ -95,10 +95,13 @@ all_sources()
all_compiled_sources()
{
realpath -es $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) \
include/generated/autoconf.h $(find $ignore -name "*.cmd" -exec \
grep -Poh '(?(?=^source_.* \K).*|(?=^ \K\S).*(?= \\))' {} \+ |
awk '!a[$0]++') | sort -u
{
echo include/generated/autoconf.h
find $ignore -name "*.cmd" -exec \
grep -Poh '(?(?=^source_.* \K).*|(?=^ \K\S).*(?= \\))' {} \+ |
awk '!a[$0]++'
} | xargs realpath -es $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) |
sort -u
}
all_target_sources()