[LLVMdev] [RFC] Late May Update: Progress report on CMake build system's ability to replace autoconf

[Jim Grosbach]

I’ve been trying, and thus far failing, to get the test suite up and running against a CMake+ninja clang build. Filed https://llvm.org/bugs/show_bug.cgi?id=23746 <https://llvm.org/bugs/show_bug.cgi?id=23746>. Depending on what workarounds people know of or can come up with, that may or may not be a blocker.

-Jim

> On May 28, 2015, at 8:22 AM, Chris Bieneman <beanz at apple.com> wrote:
> 
> Hi all,
> 
> Time for another update on the status of the CMake build system.
> 
> Completed:
> * Bug 18496 - [cmake] .S assembly files not compiled by cmake in libclang_rt.ARCH
> * Bug 22725 - lldb build with cmake fails with "Program error: Invalid parameters entered, -h for help. "
> * Update GettingStarted to prefer CMake
> 
> Still Outstanding:
> 
> * Bug 14109 - CMake build for compiler-rt should use just-built clang
> - No Update: Still some small issues to resolve.
> 
> * Bug 19462 - Use the INSTALL(EXPORT ...) to export CMake definitions
> - I commented in the review for this today (http://reviews.llvm.org/D7623). I think the patches I have are good to land, but Stephen Kelly made some other suggestions in the bug we should consider separately.
> 
> * Bug 19875 - libraries and executables need different rpaths
> - No Update: Still outstanding, I don't think this is a blocker.
> 
> * Bug 21561 - Update release scripts to use CMake
> - No Update: Still outstanding and blocking removal of autoconf
> 
> * Bug 21562 - Add a CMake equivalent for make/platform/clang_darwin.mk in compiler_rt
> - I've looked at this a bit on and off. It is unfortunately a hard problem. I think it would be easier if CMake had better support for setting clang's sysroot and arch flags. To that end I've filed a bug against CMake (http://www.cmake.org/Bug/view.php?id=15591).
> 
> * Bug 21568 - Cannot add rpath
> - No Update: Not a blocker.
> 
> Other issues not tracked by bugs:
> 
> * FreeBSD seemed to have problems with CMake identifying itself as amd64 causing x86_64 tests to fail
> * Migrating buildbots
> * We need to make sure libc++ works properly on Darwin
> * Put together a “cheat sheet” document for transitioning
> - If you have an autoconf workflow you’d like to see in the cheat sheet please send your commands my way and I‘ll assemble the cheat sheet.
> 
> If there is anything I’m missing please let me know. Thanks,
> 
> Thanks,
> -Chris
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