Hi All,
Building an x86_64 external module from an x86 (32-bit) Linux 2.6.35,
I get a "stack protector enabled but no compiler support" error.
I'm by no way a kbuild (or even make) specialist, but it looks to me
like the problem is this:
The error is produced in arch/x86/Makefile, line 81.
Looking further, it looks like this code relies on $(biarch) being set
to the CC bitness parm (-m32 / -m64) to call the cc_has_sp detection
script (line 77).
Problem is, $(biarch) is only set (to -m32) when CONFIG_X86_32 is set
(line 20), but *not* when the else clause is taken (-m64 option is
directly set then in KBUILD_AFLAGS and KBUILD_CFLAGS then, (lines
49-50) ).
As a result, the detection scripts always fails.
replacing lines 49-50 by something like:
biarch := $(call cc-option,-m64)
KBUILD_AFLAGS += $(biarch)
KBUILD_CFLAGS += $(biarch)
solves the problem.
I just checked with the latest 2.6.37, and arch/x86/Makefile hasn't
changed since 2.6.35 (at least not in that part of the file).
Questions are:
- Could someone more knowledgeable than me in that matter be kind
enough to confirm that this is truely the problem (and a valid
solution)?
and if so,
- Is this the right place to report it to get it eventually fixed?
(and if it ain't, where should it be?)
TIA! /Ph.
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