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Qyriad 9e1b0b04ad meson: flip the switch!!
This commit makes Meson the default buildsystem for Lix.
The Make buildsystem is now deprecated and will be removed soon, but has
not yet, which will be done in a later commit when all seems good. The
mesonBuild jobs have been removed, and have not been replaced with
equivalent jobs to ensure the Make buildsystem still works.

The full, new commands in a development shell are:

$ meson setup ./build "--prefix=$out" $mesonFlags

(A simple `meson setup ./build` will also build, but will do a different
thing, not having the settings from package.nix applied.)

$ meson compile -C build
$ meson test -C build --suite=check
$ meson install -C build
$ meson test -C build --suite=installcheck

(Check and installcheck may both be done after install, allowing you to
omit the --suite argument entirely, but this is the order package.nix
runs them in.)

If tests fail and Meson helpfully has no output for why, use the
`--print-error-logs` option to `meson test`. Why this is not the default
I cannot explain.

If you change a setting in the buildsystem, most cases will automatically
regenerate the Meson configuration, but some cases, like trying to build
a specific target whose name is new to the buildsystem (e.g.
`meson compile -C build src/libmelt/libmelt.dylib`, when
`libmelt.dylib` did not exist as a target the last time the buildsystem
was generated), then you can reconfigure using new settings but existing
options, and only recompiling stuff affected by the changes:

$ meson setup --reconfigure build

Note that changes to the default values in `meson.options` or in the
`default_options :` argument to project() are NOT propagated with

If you want a totally clean build, you can use:

$ meson setup --wipe build

That will work regardless of if `./build` exists or not.

Specific, named targets may be addressed in `meson build -C build <target>`
with "target ID" if there is one, which is the first string argument
passed to target functions that have one, and unrelated to the variable
name, e.g.:

libexpr_dylib = library('nixexpr', …)

can be addressed with:

$ meson compile -C build nixexpr

All targets may be addressed as their output, relative to the build
directory, e.g.:

$ meson compile -C build src/libexpr/libnixexpr.so

But Meson does not consider intermediate files like object files
targets. To build a specific object file, use Ninja directly and
specify the output file relative to the build directory:

$ ninja -C build src/libexpr/libnixexpr.so.p/nixexpr.cc.o

To inspect the canonical source of truth on what the state of the
buildsystem configuration is, use:

$ meson introspect

Have fun!

Change-Id: Ia3e7b1e6fae26daf3162e655b4ded611a5cd57ad
2024-04-18 16:15:58 -06:00
.github Add pre-commit checks 2024-03-29 22:57:40 -07:00
bench Add benchmarking scripts 2024-04-08 19:50:24 -07:00
clang-tidy Create clang-tidy check to rename all our includes 2024-04-06 04:40:19 +00:00
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
doc Merge "build internal API docs with Meson" into main 2024-04-17 21:48:25 +00:00
lix-doc Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
m4 Merge pull request #6258 from obsidiansystems/gcc-bug-ergonomics 2024-03-04 05:24:33 +01:00
maintainers docs: don't compute rl-next.md during build 2024-04-09 02:09:36 +00:00
meson Add pre-commit checks 2024-03-29 22:57:40 -07:00
misc Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
mk Build with traps on signed overflow 2024-03-27 23:54:04 -07:00
nix-support binary tarball: include cacert in root paths 2024-04-12 07:04:37 -06:00
perl Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
scripts meson: correctly differentiate $profiledir and $sysconfdir/profile.d 2024-04-09 02:25:58 -06:00
src meson: correctly embed sandbox shell when asked 2024-04-18 16:15:58 -06:00
tests tests: unhaunt the flakes nixos tests 2024-04-18 20:09:19 +00:00
.clang-format Add pre-commit checks 2024-03-29 22:57:40 -07:00
.clang-tidy Add basic clang-tidy config 2024-03-29 20:26:38 -07:00
.dir-locals.el .dir-locals.el: Set c-block-comment-prefix 2020-07-10 11:21:06 +02:00
.editorconfig Add .editorconfig 2017-06-05 22:57:28 +01:00
.envrc Set MAKEFLAGS=-j and GTEST_BRIEF in .envrc 2024-03-28 18:17:28 -07:00
.gitignore docs: redo content generation for mdbook and manual 2024-04-11 13:32:06 +00:00
.version Update version to 2.90.0 2024-03-07 19:57:39 -07:00
boehmgc-coroutine-sp-fallback.diff Add pre-commit checks 2024-03-29 22:57:40 -07:00
boehmgc-traceable_allocator-public.diff Add pre-commit checks 2024-03-29 22:57:40 -07:00
configure.ac Stop vendoring toml11 2024-03-27 21:04:00 -04:00
CONTRIBUTING.md Put functional tests in tests/functional 2023-12-01 12:06:43 -05:00
COPYING Add pre-commit checks 2024-03-29 22:57:40 -07:00
default.nix Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
docker.nix Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
flake.lock pre-commit: stop using the flake 2024-04-08 15:29:23 -07:00
flake.nix meson: flip the switch!! 2024-04-18 16:15:58 -06:00
justfile Add a justfile to make meson friendly :) 2024-03-30 03:03:46 +00:00
local.mk build: enable libstdc++ assertions 2024-04-08 15:40:12 -07:00
Makefile un-ups your start 2024-03-18 18:28:08 -07:00
Makefile.config.in nix-doc -> lix-doc, make self-contained in package.nix 2024-04-08 04:05:13 +00:00
meson.build meson: correctly embed sandbox shell when asked 2024-04-18 16:15:58 -06:00
meson.options meson: correctly embed sandbox shell when asked 2024-04-18 16:15:58 -06:00
package.nix meson: flip the switch!! 2024-04-18 16:15:58 -06:00
precompiled-headers.h Config: Use nlohmann/json 2020-08-20 11:02:16 +02:00
README.md Improve hacking.md 2023-02-13 12:00:00 +04:00
shell.nix Remove url literals 2022-01-24 13:28:21 +01:00
treefmt.toml Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00


Open Collective supporters Test

Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.


On Linux and macOS the easiest way to install Nix is to run the following shell command (as a user other than root):

$ curl -L https://nixos.org/nix/install | sh

Information on additional installation methods is available on the Nix download page.

Building And Developing

See our Hacking guide in our manual for instruction on how to to set up a development environment and build Nix from source.

Additional Resources


Nix is released under the LGPL v2.1.