Adapted from:
From 5631d9c429857194bd55d7bcd8fa5bdd1a9899a3 Mon Sep 17 00:00:00 2001
From: Michal Marek mmarek@suse.com Date: Wed, 19 Aug 2015 17:36:41 +0200 Subject: [PATCH 1/1] kbuild: Fix clang detection
We cannot detect clang before including the arch Makefile, because that can set the default cross compiler. We also cannot detect clang after including the arch Makefile, because powerpc wants to know about clang. Solve this by using an deferred variable. This costs us a few shell invocations, but this is only a constant number.
Reported-by: Behan Webster behanw@converseincode.com Reported-by: Anton Blanchard anton@samba.org Signed-off-by: Michal Marek mmarek@suse.com
in the Linux kernel.
This will allow us to make better decisions about when to run tests later on for gcc features.
Signed-off-by: Tom Rini trini@konsulko.com --- scripts/Kbuild.include | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 98e09ce..30e6e31 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -130,6 +130,10 @@ cc-option-align = $(subst -functions=0,,\ cc-disable-warning = $(call try-run,\ $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
+# cc-name +# Expands to either gcc or clang +cc-name = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc) + # cc-version cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))