#RECOMPILE PLATFORMS HOW TO#
#RECOMPILE PLATFORMS UPDATE#

Project supports the legacy APIs (like -crosstool_top). Either the projects depending on yours support //:myplatform or your.The rules your project’s dependencies use can infer correct toolchains.

The rules your project uses can infer correct toolchains from.$ bazel build //:myproject -platforms =//:myplatform The remainder of this page describes this migration sequence and how and whenīazel’s platform migration is complete when all projects build with the form: It’s not yet safe to globally enable platforms for all C++ builds. Your C++ project may not care about Android. Requires an ordered migration sequence to keep projects working correctly.Ĭ++ Rules aleady support platforms while theĪndroid Rules don’t. Toolchains, dependencies, and select()s have to support the new APIs. This isn’t trivial because all of a project’s languages, These APIs aren’t enough for all projects to use platforms, and the old APIs Thisĭemands more principled support for these concepts, including clear APIs thatīind rather than diverge languages and projects. Which evolved their own independent interface with -java_toolchain.īazel aims to excel at large, mixed-language, multi-platform projects. They also don’t say anything about Java toolchains, Historic attempts to use them for that inevitably led to awkward and To set a build’s target CPU and C++ toolchain. For example, C++ rules use -cpu and -crosstool_top It wasīy the observation that language maintainers were already doing this in ad hocĪnd incompatible ways. This is a relatively recent addition to Bazel. Software projects to target different kinds of computers with different Platforms and toolchains were introduced to standardize the need for Platforms and toolchains with your project, with some work. To make them work universally are ongoing. In short: the core APIs are available but the rule and depot migrations required Navigate these relationships for maximum value with minimum cognitive

#RECOMPILE PLATFORMS HOW TO#

This page summarizes the arguments for using platforms and shows how to Integrating this into real projects requiresĬoherent cooperation between project and library owners, rule maintainers, You can read about the migration, and let us know what you think.īazel has sophisticated support for modeling platforms and

#RECOMPILE PLATFORMS UPDATE#

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Recompile platforms