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After discussing with Intel, turns out that ICC defaults to aligning
the stack when it needs to (e.g., when issuing aligned operations), but
doesn't care otherwise. GCC, on the other hand, expects the stack to
always be aligned and will issue instructions without checking.
We'll probably add __attribute__((force_align_arg_pointer)) to some
functions in our code, but we won't be able to catch everything.
Reviewed-By: Bradley T. Hughes
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ICC generates jump table code that isn't PIC (i.e., it does absolute
indirect jumps), so this increases the number of relocations in shared
libraries by a huge amount.
In QtCore it increased by 250% (from 3500 to 12000).
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Reviewed-by: joerg
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the unix makefile generator can make files for "regular" unixes and
macos (the difference being the framework handling). so far, the output
choice was hard-wired to the host platform. the previous commit made
that soft-configurable, and this one exploits this capability to enable
limited cross-building.
Reviewed-by: mariusSO
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Reviewed-by: Trust Me
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Reviewed-by: Trust Me
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Reviewed-by: Trust Me
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Reviewed-by: Trust Me
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Reviewed-by: Trust Me
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