forked from OSchip/llvm-project
a378c04495
We make assumptions about what projects and runtimes are enabled when configuring our toolchain build, so we should enable those in the cache file as well rather than relying on those being set externally. Differential Revision: https://reviews.llvm.org/D81514 |
||
|---|---|---|
| .. | ||
| 3-stage-base.cmake | ||
| 3-stage.cmake | ||
| Android-stage2.cmake | ||
| Android.cmake | ||
| Apple-stage1.cmake | ||
| Apple-stage2-ThinLTO.cmake | ||
| Apple-stage2.cmake | ||
| BaremetalARM.cmake | ||
| CrossWinToARMLinux.cmake | ||
| DistributionExample-stage2.cmake | ||
| DistributionExample.cmake | ||
| Fuchsia-stage2.cmake | ||
| Fuchsia.cmake | ||
| PGO-stage2-instrumented.cmake | ||
| PGO-stage2.cmake | ||
| PGO.cmake | ||
| README.txt | ||
README.txt
CMake Caches ============ This directory contains CMake cache scripts that pre-populate the CMakeCache in a build directory with commonly used settings. You can use the caches files with the following CMake invocation: cmake -G <build system> -C <path to cache file> [additional CMake options (i.e. -DCMAKE_INSTALL_PREFIX=<install path>)] <path to llvm> Options specified on the command line will override options in the cache files. The following cache files exist. Apple-stage1 ------------ The Apple stage1 cache configures a two stage build similar to how Apple builds the clang shipped with Xcode. The build files generated from this invocation has a target named "stage2" which performs an LTO build of clang. The Apple-stage2 cache can be used directly to match the build settings Apple uses in shipping builds without doing a full bootstrap build. PGO --- The PGO CMake cache can be used to generate a multi-stage instrumented compiler. You can configure your build directory with the following invocation of CMake: cmake -G <generator> -C <path_to_clang>/cmake/caches/PGO.cmake <source dir> After configuration the following additional targets will be generated: stage2-instrumented: Builds a stage1 x86 compiler, runtime, and required tools (llvm-config, llvm-profdata) then uses that compiler to build an instrumented stage2 compiler. stage2-instrumented-generate-profdata: Depends on "stage2-instrumented" and will use the instrumented compiler to generate profdata based on the training files in <clang>/utils/perf-training stage2: Depends on "stage2-instrumented-generate-profdata" and will use the stage1 compiler with the stage2 profdata to build a PGO-optimized compiler. stage2-check-llvm: Depends on stage2 and runs check-llvm using the stage3 compiler. stage2-check-clang: Depends on stage2 and runs check-clang using the stage3 compiler. stage2-check-all: Depends on stage2 and runs check-all using the stage3 compiler. stage2-test-suite: Depends on stage2 and runs the test-suite using the stage3 compiler (requires in-tree test-suite). 3-stage ------- 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.