Re: stack-protect in conflict with CROSS_COMPILE

[Ralf Baechle]

On Mon, Aug 14, 2006 at 06:07:29AM -0600, Matthew Wilcox wrote:

> Hi Sam,
> 
> We've stumbled on a problem with -fno-stack-protector and CROSS_COMPILE:
> 
> CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
>                    -fno-strict-aliasing -fno-common
> # Force gcc to behave correct even for buggy distributions
> CFLAGS          += $(call cc-option, -fno-stack-protector)
> 
> round about line 310 of Makefile will cause CC to be called before we
> get a chance to set CROSS_COMPILE in arch/parisc/Makefile.  For people
> who are compiling 64-bit parisc kernels, this means the wrong gcc gets
> called, and sometimes the compiler versions are out of sync.
> 
> We will have similar problems with:
> 
> CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
> 
> Should we include the arch Makefile earlier in the proceedings?

The -fno-stack-protector issue also affects MIPS.

  Ralf
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