[LLVMdev] [lld] lld build needs to have flags that specify what flavor/targets to build ? (original) (raw)

Shankar Easwaran shankare at codeaurora.org
Tue Oct 7 16:37:04 PDT 2014

On 10/7/2014 5:53 PM, Michael Spencer wrote:

On Tue, Oct 7, 2014 at 2:31 PM, Rui Ueyama <ruiu at google.com> wrote:

On Tue, Oct 7, 2014 at 2:22 PM, Shankar Easwaran <shankare at codeaurora.org> wrote:

On 10/7/2014 4:10 PM, Nick Kledzik wrote:

Shankar,

Can you give provide a scenario where you want this? I’m not sure what you want here. a) LLVM could be built just for one target(LLVMTARGETSTOBUILD) b) With LTO this case might happen more often, where an user would have compiled LLVM just for one architecture and lld would support other architectures that LLVM would not support. c) Printing all the targets/flavors that the linker currently supports. What's the motivation to build a LLD only for some specific target? Size? LLD is not a large executable. When compiled with Release, it's a few megabyte binary. If you kill architectures that you don't need, you won't save that much. On the other hand, making something configurable always comes with cost. It's not hard to imagine that we would get a bug reports that "feature X didn't work if we build LLD only for target Y." Agreed. I'm fine with having a runtime way to not expose specific targets in the case you want to ship lld to customers and don't want to imply you support the other targets. This would be nice too. Could you please elaborate on the design ?

Shankar Easwaran-- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation

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