[PATCH] Fix spurious error on TAGS target when missing defconfig

Not all architectures have a file named 'defconfig' (e.g.  powerpc).
However the make TAGS and make tags targets search such files for tags,
causing an error message when they don't exist.  This patch addresses the
problem by instructing xargs not to run the tags program if there are no
matching files.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/Makefile b/Makefile
index 4c6c5e32ef96e3d12da975e682ee8a3f6ebc37e3..adb2c748e105609e2f37b91318e87c90bb189961 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1321,7 +1321,7 @@ define xtags
                --langdef=kconfig \
                --language-force=kconfig \
                --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
-           $(all-defconfigs) | xargs $1 -a \
+           $(all-defconfigs) | xargs -r $1 -a \
                --langdef=dotconfig \
                --language-force=dotconfig \
                --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
@@ -1329,7 +1329,7 @@ define xtags
            $(all-sources) | xargs $1 -a; \
            $(all-kconfigs) | xargs $1 -a \
                --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
-           $(all-defconfigs) | xargs $1 -a \
+           $(all-defconfigs) | xargs -r $1 -a \
                --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
        else \
            $(all-sources) | xargs $1 -a; \