lix/src
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
..
build-remote Merge pull request #4477 from NixOS/ca/build-remote 2021-02-26 16:54:44 +01:00
cpptoml Revert the enum struct change 2020-06-18 22:11:26 +00:00
libcmd Split the parsing of an App and its resolving 2021-05-17 17:50:41 +02:00
libexpr Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
libfetchers fix error: 'optional' in namespace 'std' does not name a template type 2021-06-02 18:09:03 +08:00
libmain restoreSignals() + restoreAffinity() -> restoreProcessContext() 2021-04-07 13:10:02 +02:00
libstore Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00
libutil Extract a generic computeClosure function 2021-05-19 11:44:58 +02:00
nix doc: Wrap at 80 characters 2021-06-02 11:26:04 +02:00
nix-build restoreSignals() + restoreAffinity() -> restoreProcessContext() 2021-04-07 13:10:02 +02:00
nix-channel Initialize plugins after handling initial command line flags 2021-02-24 08:22:17 -05:00
nix-collect-garbage Initialize plugins after handling initial command line flags 2021-02-24 08:22:17 -05:00
nix-copy-closure Use RealisedPaths in copyPaths 2021-02-25 17:18:48 +01:00
nix-env Rename Buildable 2021-04-05 09:52:25 -04:00
nix-instantiate Initialize plugins after handling initial command line flags 2021-02-24 08:22:17 -05:00
nix-store Rename Buildable 2021-04-05 09:52:25 -04:00
nlohmann Revert "Use upstream nlohmann_json" 2021-04-05 21:24:55 +01:00
resolve-system-dependencies Apply OS checks to host platform, not build 2021-06-23 15:00:36 +00:00