It can currently be difficult to diagnose a build that fails due to the compiler, linker or other parts of the toolchain being unable to build binaries of the type required by the kernel config. For example using a little endian toolchain to build a big endian kernel may produce:
as: unrecognized option '-maltivec' This patch adds a basic compile test and error message to arch/powerpc/Makefile so that the above error becomes: *** Sorry, your toolchain seems to be broken or incorrect. *** Make sure it supports your kernel configuration (ppc64). Signed-off-by: Sam Bobroff <sam.bobr...@au1.ibm.com> --- arch/powerpc/Makefile | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 96efd82..0041cd2 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -355,6 +355,13 @@ TOUT := .tmp_gas_check # - Require gcc 4.0 or above on 64-bit # - gcc-4.2.0 has issues compiling modules on 64-bit checkbin: + @if test "$(call try-run,echo 'int _start(void) { return 0; }' > \"$$TMP\"; \ + $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -x c -nostdlib \"$$TMP\" \ + -o /dev/null,ok,broken)" = "broken" ; then \ + echo "*** Sorry, your toolchain seems to be broken or incorrect. ***" ; \ + echo "Make sure it supports your kernel configuration ($(UTS_MACHINE))." ; \ + false; \ + fi @if test "$(cc-name)" != "clang" \ && test "$(cc-version)" = "0304" ; then \ if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ -- 2.1.0 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev