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---
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title: Release 0.41
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short-description: Release notes for 0.41
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# New features
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## Dependency Handler for LLVM
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Native support for linking against LLVM using the `dependency` function.
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## vcs_tag keyword fallback is now optional
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The `fallback` keyword in `vcs_tag()` is now optional. If not given,
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its value defaults to the return value of `meson.project_version()`.
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## Better quoting of special characters in ninja command invocations
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The ninja backend now quotes special characters that may be
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interpreted by ninja itself, providing better interoperability with
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custom commands. This support may not be perfect; please report any
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issues found with special characters to the issue tracker.
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## Pkgconfig support for custom variables
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The Pkgconfig module object can add arbitrary variables to the generated .pc
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file with the new `variables` keyword:
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```meson
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pkg.generate(libraries : libs,
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subdirs : h,
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version : '1.0',
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name : 'libsimple',
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filebase : 'simple',
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description : 'A simple demo library.',
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variables : ['datadir=${prefix}/data'])
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```
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## A target for creating tarballs
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Creating distribution tarballs is simple:
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ninja dist
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This will create a `.tar.xz` archive of the source code including
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submodules without any revision control information. This command also
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verifies that the resulting archive can be built, tested and
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installed. This is roughly equivalent to the `distcheck` target in
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other build systems. Currently this only works for projects using Git
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and only with the Ninja backend.
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## Support for passing arguments to Rust compiler
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Targets for building rust now take a `rust_args` keyword.
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## Code coverage export for tests
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Code coverage can be generated for tests by passing the `--cov` argument to
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the `run_tests.py` test runner. Note, since multiple processes are used,
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coverage must be combined before producing a report (`coverage3 combine`).
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## Reproducible builds
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All known issues have been fixed and Meson can now build reproducible Debian
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packages out of the box.
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## Extended template substitution in configure_file
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The output argument of `configure_file()` is parsed for @BASENAME@ and
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@PLAINNAME@ substitutions.
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## Cross-config property for overriding whether an exe wrapper is needed
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The new `needs_exe_wrapper` property allows overriding auto-detection for
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cases where `build_machine` appears to be compatible with `host_machine`,
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but actually isn't. For example when:
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- `build_machine` is macOS and `host_machine` is the iOS Simulator
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- the `build_machine`'s libc is glibc but the `host_machine` libc is uClibc
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- code relies on kernel features not available on the `build_machine`
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## Support for capturing stdout of a command in configure_file
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`configure_file()` now supports a new keyword - `capture`. When this argument
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is set to true, Meson captures `stdout` of the `command` and writes it to
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the target file specified as `output`.
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