Jordan Rupprecht e697f3e717 [llvm-ar] Support N [count] modifier ...

Summary:
GNU ar supports the 'N' count modifier for the extract (x) and delete (d) operations. When an archive contains multiple members with the same name, this can be used to extract (or delete) them individually. For example:

```
$ llvm-ar t archive.a
foo
foo
$ llvm-ar x archive.a
-> Writes foo twice, overwriting it the second time :( :(
$ llvm-ar xN 1 archive.a foo && mv foo foo.1
$ llvm-ar xN 2 archive.a foo && mv foo foo.2
-> Write foo twice, renaming it in between invocations to preserve all versions
```

Reviewers: ruiu, MaskRay

Reviewed By: ruiu, MaskRay

Subscribers: jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59503

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356466 91177308-0d34-0410-b5e6-96231b3b80d8

2019-03-19 16:09:54 +00:00

..

CMakeLists.txt

Revert 349677, it contained a whole bunch of stuff I did not mean to commit

2018-12-19 20:19:58 +00:00

llvm-ar.cpp

[llvm-ar] Support N [count] modifier

2019-03-19 16:09:54 +00:00

LLVMBuild.txt

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00