On 02/07/2014 05:15 PM, Markos Chandras wrote:
In case the compiler does not support the stack-protector option, unset the flag to avoid build failures. Printing a warning is enough to let the user know that this flag will not be used. Fixes the following build problem when using a toolchain which does not support the -fstack-protector-strong flag: Makefile:614: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler mips-linux-gnu-gcc: error: unrecognized command line option '-fstack-protector-strong' scripts/Makefile.build:308: recipe for target 'scripts/mod/empty.o' failed make[2]: *** [scripts/mod/empty.o] Error 1 make[2]: *** Waiting for unfinished jobs.... scripts/Makefile.build:455: recipe for target 'scripts/mod' failed Cc: Michal Marek <mmarek@xxxxxxx> Cc: linux-kbuild@xxxxxxxxxxxxxxx Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx> --- Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Makefile b/Makefile index 606ef7c..63a5333 100644 --- a/Makefile +++ b/Makefile @@ -607,12 +607,14 @@ ifdef CONFIG_CC_STACKPROTECTOR_REGULAR ifeq ($(call cc-option, $(stackp-flag)),) $(warning Cannot use CONFIG_CC_STACKPROTECTOR: \ -fstack-protector not supported by compiler)) + stackp-flag := endif else ifdef CONFIG_CC_STACKPROTECTOR_STRONG stackp-flag := -fstack-protector-strong ifeq ($(call cc-option, $(stackp-flag)),) $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \ -fstack-protector-strong not supported by compiler) + stackp-flag := endif else # Force off for distro compilers that enable stack protector by default.
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