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
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