From: Paul Cercueil Date: Fri, 17 Apr 2015 21:35:04 +0000 (+0200) Subject: Makefile: Fix detection of clang when cross-compiling X-Git-Tag: firefly_0821_release~176^2~1484^2~3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ee4eb20dbce91751c248399e8a0cf9b8813adf5a;p=firefly-linux-kernel-4.4.55.git Makefile: Fix detection of clang when cross-compiling When the host's C compiler is clang, and when attempting to cross-compile Linux e.g. to MIPS with mipsel-linux-gcc, the Makefile would incorrectly detect the use of clang, which resulted in clang-specific flags being passed to mipsel-linux-gcc. This can be verified under Debian by installing the "clang" package, and then using it as the default compiler with: sudo update-alternatives --config cc This patch moves the detection of clang after the $(CC) variable is initialized to the name of the cross-compiler, so that the check applies to the cross-compiler and not the host's C compiler. v2: Move the detection of clang after the inclusion of the arch/*/Makefile (as they might set $(CROSS_COMPILE)) Signed-off-by: Paul Cercueil Signed-off-by: Michal Marek --- diff --git a/Makefile b/Makefile index 7ff1239f9cd2..2d225aa4d7e3 100644 --- a/Makefile +++ b/Makefile @@ -336,15 +336,6 @@ endif export KBUILD_MODULES KBUILD_BUILTIN export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD -ifneq ($(CC),) -ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1) -COMPILER := clang -else -COMPILER := gcc -endif -export COMPILER -endif - # We need some generic definitions (do not try to remake the file). scripts/Kbuild.include: ; include scripts/Kbuild.include @@ -671,6 +662,13 @@ endif endif KBUILD_CFLAGS += $(stackp-flag) +ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1) +COMPILER := clang +else +COMPILER := gcc +endif +export COMPILER + ifeq ($(COMPILER),clang) KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)