On Thu, Feb 08, 2007 at 10:10:54PM +1100, Paul Mackerras wrote: > Commit 5de043f4bd11a9e0a3e8daec7d1905da575a76b7 breaks the build on > 64-bit powerpc because we no longer get the -m64 flag passed to gcc. > There is code in arch/powerpc/Makefile which adds (or used to add) > -m64 to AS, LD and CC if we are running on a 64-bit machine (which I > am) and have a biarch toolchain (which I do). Without -m64, the > toolchain assumes 32-bit and all sorts of things break spectacularly. > > I haven't yet tracked down exactly why this commit has this effect, > since I find it takes considerable time and effort to understand > Kbuild.
As i have refactored some CC checking code in Kbuild.include, it turned, that some versions of `make' after calling nested functions, add (or leave) prefix whitespace to result, thus ifeq[0] fails: .-*- (ppc Makefile) |HAS_BIARCH := $(call cc-option-yn, -m32) 0|ifeq ($(HAS_BIARCH),y) |AS := $(AS) -a32 |LD := $(LD) -m elf32ppc |CC := $(CC) -m32 |endif David wrote and showed a testcase. Adding $(strip ) wrapper helped with this, but may screw many other things. Maybe you will help, unless Linus will finally revert this :) ____ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
