Hi, > > 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 <paul@xxxxxxxxxxxxxxx > <mailto:paul@xxxxxxxxxxxxxxx>> > > Applied to kbuild.git#kbuild. I will push it after v4.1-rc1 > becomes available, though. > > Drat. I wish I saw this earlier. > > This breaks patches which check for the value of COMPILER in > arch/*/Makefile. This detection must be performed before the > inclusion of the arch Makefile. > > Can I move this to after the initialization of CC but before the > include? > > I'm not sure that being able to define the default compiler per arch > is necessary. But I know I need to be able to add arch specific flags > for clang. I can confirm the patch breaks ppc64le clang builds. Anton -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
