Bazel vs cmake11/28/2023 ![]() ![]() Next the necessary rules for common toolchains used in foreign build system integration is loaded from the line "rules_foreign_cc_dependencies"). The line "http_archive") is used to load the http_archive rule from the http.bzl file, which is part of the Bazel tools repository The http archive a built-in Bazel rule that allows you to download and extract archives is used to achieve this. Rules_foreign_cc is not an inbuilt function like load, infact the repository says not an officially supported Google product, so to use this, one has to download the repo (i know what you are thinking, calm down □, i dont know why too) To incoperate external dependecies with forigen build system in Bazel, you must use the rules_foreign_cc, from a cmake point of view i would say it is a bit akin to CMake's ExternalProject, It simplifies the process of managing external dependencies and allows seamless use of foreign libraries in Bazel-based C++ projects. For more details, please see # https : ///bazelbuild/rules_foreign_cc/tree/main/docs#rules_foreign_cc_dependencies rules_foreign_cc_dependencies ( ) Url = "", ) load (, "rules_foreign_cc_dependencies" ) # This sets up some common toolchains for building targets. Strip_prefix = "rules_foreign_cc-0.9.0" , Workspace (name = "my_project" ) load (, "http_archive" )Īll_content = "" "filegroup(name = "all ", srcs = glob(), visibility = )""" http_archive ( Thats basically just it! simple and clear □Īlright lets try another example but this time with external dependecies with same file structure, first we will be modifying the WORKSPACE file It helps manage the visibility and encapsulation of targets within a project. In Bazel, the visibility attribute plays a crucial role in controlling which targets can depend on and access other targets in the build graph just like Cmake too. The visibility attribute is set to, which means that the "math" library is intended to be visible and accessible to other parts of the project or external projects. ![]() It depends on the math library, specified by the deps attribute with the value. ![]() The cc_binary target, named main, represents an executable binary and includes the source files from. The cc_library target, named math represents a C++ library and includes the source files from the "math/" file and header files from the "math/math.h" file. In this Bazel BUILD file snippet, two targets were defined: a C++ library named math and a binary executable named main. The first example is a simple C++ program with the following file structure Bazel supports projects in multiple languages and builds outputs for multiple platforms.įirst you have to install Bazel for both linux and windows, i would recommend downloading the bazel binary method, but hey, your choice!, check out installation methods and instructions here It uses a human-readable, high-level build language. So yea coming from a cmake fan i would be giving you a beginner friendly intro to Bazel, will tell you what you should look out for, why i love it or why i dont ? lets see !īazel is an open-source build and test tool made by Google similar to Make, Maven, and Gradle. Sooo, we are changing that today!□, for the past few weeks i have been trying out Bazel (a friend introduced me to it) and honestly its not bad atall, really impressive IMO. By the way, I recently wrote a blog about it. I don't think I have ever used any other build tools for C++ except CMake. To be honest, I have always been a fan of CMake □. Build Systems are tools used to automate the build process of projects while avoiding common build-related errors.
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