[PATCH] D19190: [ELF] - Implemented PROVIDE linker script command.

[George Rimar via llvm-commits]

grimar updated this revision to Diff 54367.
grimar added a comment.

- Addressed review comments.

Changed addAbsolute to addSynthetic as was suggested by Rafael. That allows to add provide symbols early without updating symbols values during assignaddress. 
I introduced next limitation for that: provide expression can't be anything except assign location counter. i.e only "xxx = ." is valid. And since
only provides inside output description sections are now allowed, that helps to avoid storing symbols in array for futher modification.
And it still covers the needs of script files I saw, so it should be reasonable simplification.


http://reviews.llvm.org/D19190

Files:
  ELF/LinkerScript.cpp
  ELF/LinkerScript.h
  ELF/Writer.cpp
  test/ELF/linkerscript-provide.s

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