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Alyssa Ross 4f80464645
Apply OS checks to host platform, not build
Previously, the build system used uname(1) output when it wanted to
check the operating system it was being built for, which meant that it
didn't take into-account cross-compilation when the build and host
operating systems were different.

To fix this, instead of consulting uname output, we consult the host
triple, specifically the third "kernel" part.

For "kernel"s with stable ABIs, like Linux or Cygwin, we can use a
simple ifeq to test whether we're compiling for that system, but for
other platforms, like Darwin, FreeBSD, or Solaris, we have to use a
more complicated check to take into account the version numbers at the
end of the "kernel"s.  I couldn't find a way to just strip these
version numbers in GNU Make without shelling out, which would be even
more ugly IMO.  Because these checks differ between kernels, and the
patsubst ones are quite fiddly, I've added variables for each host OS
we might want to check to make them easier to reuse.
2021-06-23 15:00:36 +00:00
.github throw freenode down the memory hole 2021-05-27 21:48:39 +02:00
config Run autoupdate 2021-06-01 11:42:38 +02:00
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
doc/manual doc/nix-shell: Remove outdated bashrc information 2021-05-11 14:33:35 +02:00
m4 autoconf: Fix C++17 detection not working on Ubuntu 16.04. 2019-07-03 04:32:25 +02:00
maintainers Update nix-fallback-paths.nix only 2021-05-14 14:03:53 +02:00
misc Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
mk Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
nix-rust Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
perl Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
scripts Include aarch64-darwin in installer 2021-06-01 09:48:35 +02:00
src Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
tests Let nix flake check keep going when keep-going is set 2021-06-02 11:13:12 +02:00
.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
.gitignore Add a test for nix run with CA derivations 2021-05-17 15:10:48 +02:00
.version Revert "Bump version to 3.0" 2020-10-26 11:30:18 +01:00
bootstrap.sh bootstrap: Simplify & make more robust. 2011-09-06 12:11:05 +00:00
configure.ac configure.ac: fix use of unread LIBS variable 2021-06-04 11:25:36 +00:00
COPYING * Change this to LGPL to keep the government happy. 2006-04-25 16:41:06 +00:00
default.nix Simplify shell.nix and default.nix 2020-06-17 19:21:46 +02:00
flake.lock flake.lock: Update 2021-06-02 11:58:46 +02:00
flake.nix Include aarch64-darwin in installer 2021-06-01 09:48:35 +02:00
local.mk Remove 'dist' target 2020-12-03 16:17:58 +01:00
Makefile Install zsh completion script 2021-06-02 00:44:03 +08:00
Makefile.config.in Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
precompiled-headers.h Config: Use nlohmann/json 2020-08-20 11:02:16 +02:00
README.md throw freenode down the memory hole 2021-05-27 21:48:39 +02:00
shell.nix Add back flake-compat shell.nix 2020-07-17 14:58:59 +00:00

Nix

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.

Installation

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 build nix from source with nix-build or how to get a development environment.

Additional Resources

License

Nix is released under the LGPL v2.1.