[PATCH] kbuild: dummy-tools, support MPROFILE_KERNEL checks for ppc

From: Jiri Slaby
Date: Mon Mar 08 2021 - 01:29:03 EST


ppc64le checks for -mprofile-kernel to define MPROFILE_KERNEL Kconfig.
Kconfig calls arch/powerpc/tools/gcc-check-mprofile-kernel.sh for that
purpose. This script performs two checks:
1) build with -mprofile-kernel should contain "_mcount"
2) build with -mprofile-kernel with a function marked as "notrace"
should not produce "_mcount"

So support this in dummy-tools' gcc, so that we have MPROFILE_KERNEL
always true.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
scripts/dummy-tools/gcc | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc
index 0d0589cf8184..7b10332b23ba 100755
--- a/scripts/dummy-tools/gcc
+++ b/scripts/dummy-tools/gcc
@@ -73,6 +73,15 @@ if arg_contain -S "$@"; then
echo "%gs"
exit 0
fi
+
+ # For arch/powerpc/tools/gcc-check-mprofile-kernel.sh
+ if arg_contain -m64 "$@" && arg_contain -mlittle-endian "$@" &&
+ arg_contain -mprofile-kernel "$@"; then
+ if ! test -t 0 && ! grep -q notrace; then
+ echo "_mcount"
+ fi
+ exit 0
+ fi
fi

# To set GCC_PLUGINS
--
2.30.1