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Currently LLD sets OutSecOff in addSection for input sections.
That is a fake offset (just a rude approximation to remember the order),
used for sorting SHF_LINK_ORDER sections
(see resolveShfLinkOrder, compareByFilePosition).
There are 2 problems with such approach:
1. We currently change and reuse Size field as a value assigned. Changing size is
not good because leads to bugs. Currently, SIZEOF(.bss) for empty .bss returns 2
because we add two empty synthetic sections and increase size twice by 1.
(See PR37011: https://bugs.llvm.org/show_bug.cgi?id=37011)
2. Such approach simply does not work when --symbol-ordering-file is involved,
because processing of the ordering file might break the initial section order.
This fixes PR37011.
Differential revision: https://reviews.llvm.org/D45368
llvm-svn: 329560
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