devtools: check use of compiler attributes

The keyword __attribute__ will emit a warning,
because it is preferred to use or define a common __rte macro.
The centralized macros may help to control or workaround some compilers.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>

diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh
index 1794468..c30ce64 100755 (executable)
--- a/devtools/checkpatches.sh
+++ b/devtools/checkpatches.sh
@@ -61,6 +61,14 @@ check_forbidden_additions() { # <patch>
                -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
                "$1" || res=1
 
+       # refrain from using compiler attribute without defining a common macro
+       awk -v FOLDERS="lib drivers app examples" \
+               -v EXPRESSIONS="__attribute__" \
+               -v RET_ON_FAIL=1 \
+               -v MESSAGE='Using compiler attribute directly' \
+               -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \
+               "$1" || res=1
+
        # svg figures must be included with wildcard extension
        # because of png conversion for pdf docs
        awk -v FOLDERS='doc' \