[LLVMdev] compiler-rt CMake build

[Alexey Samsonov]

On Mon, Feb 24, 2014 at 6:05 PM, Brad King <brad.king at kitware.com> wrote:

> On 02/24/2014 08:53 AM, Alexey Samsonov wrote:
> > On Fri, Feb 21, 2014 at 9:03 PM, Brad King wrote:
> >     Just "build" should be sufficient because the generated build system
> >     in compiler-rt knows how to re-run CMake if any of the inputs have
> >     changed.
> >
> > Suppose LLVMConfig.cmake has changed.
>
> Every file CMake processes as part of configuring the project ends up in
> the build-time dependencies to re-run CMake.
>

Alright, I've switched this to
  ExternalProject_Add_Step(compiler-rt force-rebuild
    DEPENDERS build
    ALWAYS 1
    )

However, looks like this works with Unix Makefiles generators, but doesn't
work for Ninja.
When I run "ninja compiler-rt" twice in the build tree, I see the following
message on the second run:
  ninja: no work to do.
I've verified that compiler-rt is not rebuilt even if I change its sources.
Is it a CMake bug?



>
> > Could you take a look if http://llvm-reviews.chandlerc.com/D2868 looks
> reasonable?
>
> It looks pretty good to me.  I added some inline comments.
>
> -Brad
>
>


-- 
Alexey Samsonov, MSK
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