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Meson can automatically find and use external dependencies installed on the users system via pkg-config, CMake, and project-specific lookups. [18] Alternatively, or as a fallback, a dependency can be provided as a subproject – a Meson project within another, either contained or as a download link, possibly with patches. [ 19 ]
rPath allowed definition of systems as layered variants of common base platforms. For example, the standard corporate web server stack may start with a standard build of Red Hat Enterprise Linux (RHEL) but add a specific custom version of the Apache HTTP Server and remove all availability of FTP. With this feature, rPath enabled IT groups to ...
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Bazel is extensible with the Starlark programming language. [13] Starlark is an embedded language whose syntax is a subset of the Python syntax. However, it doesn't implement many of Python's language features, such as the ability to access the file I/O, in order to avoid extensions that could create side-effects or create build outputs not known to the build system itself.
In the example below, there is an output dependency between instructions 3 and 1 — changing the ordering of instructions in this example will change the final value of A, thus these instructions cannot be executed in parallel. 1. B = 3 2. A = B + 1 3. B = 7 As with anti-dependencies, output dependencies are name dependencies. That is, they ...
Make's dependency ordering and out-of-date checking makes the build process more robust and more efficient. The makefile allowed for better organization of build logic and often fewer build files. Make is widely used in part due to its early inclusion in Unix , starting with PWB/UNIX 1.0, which featured a variety of software development tools.
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Dependencies between files, as declared in the Nix language, are automatically tracked and persisted in the "Nix store". [9] New files in the Nix store are created through "derivations". A derivation is a persistent data structure that specifies an executable, arguments and environment variables for its invocation (see execve ), and other files ...