[llvm-dev] (Thin)LTO llvm build

[Teresa Johnson via llvm-dev]

Cc'ing llvm-dev again in case someone knows what is going on.

That error is coming from a polly configure script, which I don't have
cloned into my own tree. Not sure why polly would behave differently when
configuring for ThinLTO. Does polly configure ok when configuring the same
way, but for regular LTO?

Teresa

On Fri, Sep 16, 2016 at 12:36 PM, Carsten Mattner <carstenmattner at gmail.com>
wrote:

> Hi Teresa,
>
> I've just attempted a THIN_LTO build again, and the
> error I ran into is as follows, and happens during
> cmake. I'm explicitly telling cmake to us llvm-ar and llvm-ranlib
> as suggested.
>
> [...]
> -- Performing Test COMPILER_RT_HAS_STATIC_FLAG - Success
> -- Performing Test COMPILER_RT_SUPPORTS_ATOMIC_KEYWORD
> -- Performing Test COMPILER_RT_SUPPORTS_ATOMIC_KEYWORD - Success
> -- Builtin supported architectures:
> -- ISL version: isl-0.17.1-164-gcbba1b6
> -- Performing Test HAS_ATTRIBUTE_WARN_UNUSED_RESULT
> -- Performing Test HAS_ATTRIBUTE_WARN_UNUSED_RESULT - Failed
> -- Performing Test HAVE___ATTRIBUTE__
> -- Performing Test HAVE___ATTRIBUTE__ - Failed
> -- Performing Test HAVE_DECL_FFS
> -- Performing Test HAVE_DECL_FFS - Failed
> -- Performing Test HAVE_DECL___BUILTIN_FFS
> -- Performing Test HAVE_DECL___BUILTIN_FFS - Failed
> -- Performing Test HAVE_DECL__BITSCANFORWARD
> -- Performing Test HAVE_DECL__BITSCANFORWARD - Failed
> CMake Error at tools/polly/lib/External/CMakeLists.txt:90 (message):
>   No ffs implementation found
> [...]
>



-- 
Teresa Johnson |  Software Engineer |  tejohnson at google.com |  408-460-2413
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