meson

The Meson Build System http://mesonbuild.com/

Sam James 675b47b069 compilers: cpp: improve libc++ vs libstdc++ detection (again) The previous approach wasn't great because you couldn't control what the detected C++ stdlib impl was. We just had a preference list we tweaked the searched order for per OS. That doesn't work great for e.g. Gentoo with libc++ or Gentoo Prefix on macOS where we might be using libstdc++ even though the host is libc++. Jonathan Wakely, the libstdc++ maintainer, gave a helpful answer on how to best detect libc++ vs libstdc++ via macros on SO [0]. Implement it. TL;DR: Use <version> from C++20 if we can, use <ciso646> otherwise. Check for _LIBCPP_VERSION as libstdc++ doesn't always define a macro. [0] https://stackoverflow.com/a/31658120 Signed-off-by: Sam James <sam@gentoo.org> Signed-off-by: Eli Schwartz <eschwartz93@gmail.com>		8 months ago
.github	CI: pin mypy to version 1.8	8 months ago
ci	CI image builder: fix profile loading for gentoo	9 months ago
cross	Added support for Texas Instruments C6000 compiler.	8 months ago
data	macros: Allow disabling verbose mode	9 months ago
docs	Added support for Texas Instruments C6000 compiler.	8 months ago
graphics	Document the color used in the logo.	1 year ago
man	Bump version number for rc2.	9 months ago
manual tests	interpreter: Handle BuildTarget.vala_args as Files in the interpreter	1 year ago
mesonbuild	compilers: cpp: improve libc++ vs libstdc++ detection (again)	8 months ago
packaging	Use SPDX-License-Identifier consistently	11 months ago
test cases	Fix detection of unknown base options in subproj	8 months ago
tools	Use SPDX-License-Identifier consistently	11 months ago
unittests	fix reconfigure subproject base options	8 months ago
.editorconfig	editorconfig settings: attempt to guarantee the final end-of-line char	3 years ago
.flake8	Move classes used by scripts to their own module	2 years ago
.gitattributes	Mark the bash completion files for bash and zsh as Shell files	9 months ago
.gitignore	coverage: Enable coverage reports	3 years ago
.mailmap	mailmap: add alias for myself	2 years ago
.mypy.ini	fix broken type annotation imports being ignored	12 months ago
.pylintrc	pylint: enable the set_membership plugin	2 years ago
CODEOWNERS	modules/wayland: Add unstable_wayland module	3 years ago
COPYING	compilers/d: Add b_ndebug support	5 years ago
MANIFEST.in	remove outdated reference to deleted files in setuptools packaging	3 years ago
README.md	README: Document python requirement history	1 year ago
azure-pipelines.yml	azure pipelines: fix branch patterns to support 1.x release branches	2 years ago
contributing.md	compilers/d: Add b_ndebug support	5 years ago
meson.py	Use SPDX-License-Identifier consistently	11 months ago
pyproject.toml	setup.py: better requirements	3 years ago
run_cross_test.py	Use SPDX-License-Identifier consistently	11 months ago
run_format_tests.py	Use SPDX-License-Identifier consistently	11 months ago
run_meson_command_tests.py	Use SPDX-License-Identifier consistently	11 months ago
run_mypy.py	cuda module: fully type annotate	9 months ago
run_project_tests.py	fix reconfigure subproject base options	8 months ago
run_single_test.py	Use SPDX-License-Identifier consistently	11 months ago
run_tests.py	coredata: use a Protocol for shared options between setup configure and dist	9 months ago
run_unittests.py	Use SPDX-License-Identifier consistently	11 months ago
setup.cfg	mark the PyPI metadata as supporting python 3.12	1 year ago
setup.py	Use SPDX-License-Identifier consistently	11 months ago
skip_ci.py	Use SPDX-License-Identifier consistently	11 months ago

README.md

Meson® is a project to create the best possible next-generation build system.

Status

Dependencies

Python (version 3.7 or newer)
Ninja (version 1.8.2 or newer)

Latest Meson version supporting previous Python versions:

Python 3.6: 0.61.5
Python 3.5: 0.56.2
Python 3.4: 0.45.1

Installing from source

Meson is available on PyPi, so it can be installed with pip3 install meson. The exact command to type to install with pip can vary between systems, be sure to use the Python 3 version of pip.

If you wish you can install it locally with the standard Python command:

python3 -m pip install meson

For builds using Ninja, Ninja can be downloaded directly from Ninja GitHub release page or via PyPi

python3 -m pip install ninja

More on Installing Meson build can be found at the getting meson page.

Creating a standalone script

Meson can be run as a Python zip app. To generate the executable run the following command:

./packaging/create_zipapp.py --outfile meson.pyz --interpreter '/usr/bin/env python3' <source checkout>

Running

Meson requires that you have a source directory and a build directory and that these two are different. In your source root must exist a file called meson.build. To generate the build system run this command:

meson setup <source directory> <build directory>

Depending on how you obtained Meson the command might also be called meson.py instead of plain meson. In the rest of this document we are going to use the latter form.

You can omit either of the two directories, and Meson will substitute the current directory and autodetect what you mean. This allows you to do things like this:

cd <source root>
meson setup builddir

To compile, cd into your build directory and type ninja. To run unit tests, type ninja test.

More on running Meson build system commands can be found at the running meson page or by typing meson --help.

Contributing

We love code contributions. See the contribution page on the website for details.

IRC

The channel to use is #mesonbuild either via Matrix (web interface) or OFTC IRC.

Further info

More information about the Meson build system can be found at the project's home page.

Meson is a registered trademark of Jussi Pakkanen.