kbuild: dummy-tools: avoid tmpdir leak in dummy gcc

commit aac289653fa5adf9e9985e4912c1d24a3e8cbab2 upstream.

When passed -print-file-name=plugin, the dummy gcc script creates a
temporary directory that is never cleaned up. To avoid cluttering
$TMPDIR, instead use a static directory included in the source tree.

Fixes: 76426e238834 ("kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig")
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/scripts/dummy-tools/dummy-plugin-dir/include/plugin-version.h b/scripts/dummy-tools/dummy-plugin-dir/include/plugin-version.h
new file mode 100644 (file)
index 0000000..e69de29

diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc
index b2483149bbe55028527b8bbf439e663d6d032560..7db82584343559b23925cdd68f773fb7cc542f14 100755 (executable)
--- a/scripts/dummy-tools/gcc
+++ b/scripts/dummy-tools/gcc
@@ -96,12 +96,8 @@ fi
 
 # To set GCC_PLUGINS
 if arg_contain -print-file-name=plugin "$@"; then
-       plugin_dir=$(mktemp -d)
-
-       mkdir -p $plugin_dir/include
-       touch $plugin_dir/include/plugin-version.h
-
-       echo $plugin_dir
+       # Use $0 to find the in-tree dummy directory
+       echo "$(dirname "$(readlink -f "$0")")/dummy-plugin-dir"
        exit 0
 fi