| #!/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 |