r260201 - [CMake] Providing a CMake cache for 3-stage builds

[Duncan P. N. Exon Smith via cfe-commits]

> On 2016-Feb-08, at 22:01, Chris Bieneman via cfe-commits <cfe-commits at lists.llvm.org> wrote:
> 
> Author: cbieneman
> Date: Tue Feb  9 00:01:47 2016
> New Revision: 260201
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=260201&view=rev
> Log:
> [CMake] Providing a CMake cache for 3-stage builds
> 
> This cache file can be used to generate a 3-stage clang build. You can configure using the following CMake command:
> 
> cmake -C <path to clang>/cmake/caches/3-stage.cmake -G Ninja <path to llvm>
> 
> You can then run "ninja stage3-clang" to build stage1, stage2 and stage3 clangs.
> 
> This is useful for finding non-determinism the compiler by verifying that stage2 and stage3 are identical.
> 
> Added:
>    cfe/trunk/cmake/caches/3-stage.cmake

This is awesome to have!  Thanks for doing this.

> Added: cfe/trunk/cmake/caches/3-stage.cmake
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/cmake/caches/3-stage.cmake?rev=260201&view=auto
> ==============================================================================
> --- cfe/trunk/cmake/caches/3-stage.cmake (added)
> +++ cfe/trunk/cmake/caches/3-stage.cmake Tue Feb  9 00:01:47 2016
> @@ -0,0 +1,34 @@
> +set(CMAKE_BUILD_TYPE RELEASE CACHE STRING "")
> +set(CLANG_ENABLE_BOOTSTRAP ON CACHE BOOL "")
> +set(LLVM_BUILD_EXTERNAL_COMPILER_RT ON CACHE BOOL "")
> +set(LLVM_TARGETS_TO_BUILD X86 CACHE STRING "")
> +set(BOOTSTRAP_LLVM_ENABLE_LTO ON CACHE BOOL "")
> +
> +set(CLANG_BOOTSTRAP_PASSTHROUGH 
> +  CLANG_ENABLE_BOOTSTRAP
> +  LLVM_BUILD_EXTERNAL_COMPILER_RT
> +  LLVM_TARGETS_TO_BUILD
> +  CLANG_BOOTSTRAP_PASSTHROUGH
> +  BOOTSTRAP_LLVM_ENABLE_LTO
> +  CMAKE_BUILD_TYPE
> +  CACHE STRING "")
> +
> +set(CLANG_BOOTSTRAP_TARGETS
> +  clang
> +  check-all
> +  check-llvm
> +  check-clang
> +  test-suite
> +  stage3
> +  stage3-clang
> +  stage3-check-all
> +  stage3-check-llvm
> +  stage3-check-clang
> +  stage3-test-suite CACHE STRING "")
> +
> +set(BOOTSTRAP_CLANG_BOOTSTRAP_TARGETS
> +  clang
> +  check-all
> +  check-llvm
> +  check-clang
> +  test-suite CACHE STRING "")
> 
> 
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