[PATCH v2] devtools: fix false positive from checkpatch

[Stephen Hemminger <stephen@networkplumber.org>]

The codespell dictionary has "stdio" in its bad word list,
but stdio.h is often used in DPDK code and creates bogus false
positives from checkpatch.

Also add a check to the parameters to build-dict.sh so it
gives usage error if parameter is missing or does not point
to the codespell git clone.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 devtools/build-dict.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/devtools/build-dict.sh b/devtools/build-dict.sh
index a8cac49029..f2fedd534a 100755
--- a/devtools/build-dict.sh
+++ b/devtools/build-dict.sh
@@ -6,6 +6,10 @@
 
 # path to local clone of https://github.com/codespell-project/codespell.git
 codespell_path=$1
+if [ ! -d "$codespell_path/codespell_lib/data" ]; then
+	echo "Usage: $0 <path_to_codespell_project>"
+	exit 1
+fi
 
 # concatenate codespell dictionaries, except GB/US one
 for suffix in .txt _code.txt _informal.txt _names.txt _rare.txt _usage.txt ; do
@@ -17,6 +21,7 @@ sed '/^..->/d' |
 sed '/^uint->/d' |
 sed "/^doesn'->/d" |
 sed '/^wasn->/d' |
+sed '/^stdio->/d' |
 
 # print to stdout
 cat
-- 
2.45.2