On 4 Dec 2011, at 20:19, Jack Howarth wrote:
On Sun, Dec 04, 2011 at 08:18:32PM +0100, Jakub Jelinek wrote:
On Sun, Dec 04, 2011 at 02:00:20PM -0500, Jack Howarth wrote:
at -m32/-m64 on x86_64-apple-darwin11 due to the -pie linker
default. Iain had wanted
to leave these in place to encourage boehm-gc to be fixed but I
doubt that is a realistic
goal in the near/middle term. Perhaps we could patch boehm-gc/
testsuite/lib/boehm-gc.exp
to pass -fno-pie on darwin (now that it is functional)?
I think we should just find a way to add -fno-pie... Are there any
flags that are added because we are doing gc that we can key off
of?
-f{pic,PIC,pie,PIE,no-pic} aren't option that should have any
effect on how
are binaries/shared libraries linked, these options control solely
compilation. -shared, -pie or lack of these options determines how
are
things linked. So, either you should pass -no-pie or whatever
linker option
you need to generate position dependent binaries by default, unless
-shared
or -pie is specified, or you should add -no-pie or something
similar, but
IMHO it shouldn't be -fno-pie, that is a compilation option/too
similar to
them.
Jakub,
This isn't really an option on darwin11 and later since the linker
defaults to
-pie and this results in warnings from the linker of the form...
ld: warning: PIE disabled. Absolute addressing (perhaps -mdynamic-no-
pic) not allowed in code signed PIE, but used in _f from /var/tmp//
ccVNy9V9.o. To fix this warning, don't compile with -mdynamic-no-pic
or link with -Wl,-no_pie
perhaps the question should be "why is this particualr code being
built with non-default options?".
x86 darwin code should default to fPIC - so someone must be passing -
mdynamic-no-pic or -fno-PIC etc.
(perhaps derived from the bootstrap usage of the "-mdynamic-no-pic"
option - which suggests that this should be disabled for Darwin >= 11).
Iain
