arch/powerpc/tools/gcc-check-mprofile-kernel.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 set -e
   5 set -o pipefail
   6
   7 # To debug, uncomment the following line
   8 # set -x
   9
  10 # Test whether the compile option -mprofile-kernel exists and generates
  11 # profiling code (ie. a call to _mcount()).
  12 echo "int func() { return 0; }" | \
  13     $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
  14     grep -q "_mcount"
  15
  16 # Test whether the notrace attribute correctly suppresses calls to _mcount().
  17
  18 echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
  19     $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
  20     grep -q "_mcount" && \
  21     exit 1
  22
  23 echo "OK"
  24 exit 0