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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
set -e
set -o pipefail
# To debug, uncomment the following line
# set -x
# -mprofile-kernel is only supported on 64le, so this should not be invoked
# for other targets. Therefore we can pass in -m64 and -mlittle-endian
# explicitly, to take care of toolchains defaulting to other targets.
# Test whether the compile option -mprofile-kernel exists and generates
# profiling code (ie. a call to _mcount()).
echo "int func() { return 0; }" | \
$* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \
2> /dev/null | grep -q "_mcount"
# Test whether the notrace attribute correctly suppresses calls to _mcount().
echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
$* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \
2> /dev/null | grep -q "_mcount" && \
exit 1
exit 0