[SR-674] swiftpm should expose a way to set rpath

[swift-ci]

Previous ID	SR-674
Radar	rdar://problem/27119493
Original Reporter	jaybuff (JIRA User)
Type	New Feature

Additional Detail from JIRA

Votes	0
Component/s	Package Manager
Labels	New Feature
Assignee	None
Priority	Medium

md5: 186d94abaf1ebb6e2c49fa8298c993b1

is duplicated by:

• SR-1968 [SwiftPM] Need support for managing RPATH entries w.r.t. distribution
• SR-6091 Module linked multiple times if dylib is importing same module that main executable does

relates to:

• SR-1968 [SwiftPM] Need support for managing RPATH entries w.r.t. distribution

Issue Description:

There looks to be an undocumented way (e.g. setting SWIFTPM_EMBED_RPATH env var), but I take it that is only used for bootstrapping swift-build.

I'd prefer to be able to specify rpath in my Package.swift file.

[mxcl]

The new Product component in Package.swift is perfect for this.

[mxcl]

Also you can do this now:

swift build -Xlinker -rpath -Xlinker PATH

[abertelrud]

It should be possible to control this other than needing to have custom flags passed on the command line to swift build every time. I'll take a look at what Product provides.