# To debug, uncomment the following line
# set -x
-# -mprofile-kernel is only supported on 64-bit, so this should not be invoked
-# for 32-bit. We pass in -m64 explicitly, and -mbig-endian and -mlittle-endian
-# are passed in from Kconfig, which takes care of toolchains defaulting to
-# other targets.
+# -mprofile-kernel is only supported on 64-bit with ELFv2, so this should not
+# be invoked for other targets. Therefore we can pass in -m64 and -mabi
+# 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 -S -x c -O2 -p -mprofile-kernel - -o - \
+ $* -m64 -mabi=elfv2 -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 -S -x c -O2 -p -mprofile-kernel - -o - \
+ $* -m64 -mabi=elfv2 -S -x c -O2 -p -mprofile-kernel - -o - \
2> /dev/null | grep -q "_mcount" && \
exit 1