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module/Makefile.in: don't run xargs if empty 

If stdin if empty - don't run xargs command,
otherwise we can get `cp: missing file operand`
error.

Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Melikov <mail@gmelikov.ru>
Closes #9418
This commit is contained in:
George Melikov 2019-10-08 20:10:23 +03:00 committed by Brian Behlendorf
parent 94bcf6f5e3
commit 7b50929851
1 changed files with 1 additions and 1 deletions
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module/Makefile.in
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@ -115,5 +115,5 @@ distdir:
list='$(obj-m)'; for objdir in $$list; do \ list='$(obj-m)'; for objdir in $$list; do \
(cd @top_srcdir@/module && find $$objdir \ (cd @top_srcdir@/module && find $$objdir \
-name '*.c' -o -name '*.h' -o -name '*.S' | \ -name '*.c' -o -name '*.h' -o -name '*.S' | \
xargs cp --parents -t @abs_top_builddir@/module/$$distdir); \ xargs -r cp --parents -t @abs_top_builddir@/module/$$distdir); \
done done