stdenv.cross is a silly attribute that needs to go leaving the well-defined hostPlatform and targetPlatform. This PR doesn't remove it, but changes its definition: before it tracked the target platform which is sometimes more useful for compilers, and now it tracks the host platform which is more useful for everything else. Most usages are libraries, falling in the "everything else" category, so changing the definition makes sense to appease the majority. The few compiler (gcc in particular) uses that exist I remove to use targetPlatform --- preserving correctness and becoming more explicit in the process.
I would also update the documentation aside mentioning stdenv.cross as deprecated, but the definition given actually erroneously assumes this PR is already merged!
Before all overrides were also pruned in the previous stage, now
only gcc and binutils are, because they alone care about about the
target platform. The rest of the overrides don't, so it's better to
preserve them in order to avoid spurious rebuilds.
The previous commit redefines `stdenv.cross` for the sake of normal
libaries, the most common use-case of that attribute. Some compilers
however relied on the old definition so we have them use
`targetPlatform` instead. This special casing is fine because we
eventually want to remove `stdenv.cross` and use either `hostPlatform`
or `targetPlatform` instead.
In practice, this is a strictly stronger condition than target != build
as we never have build = target != host. Really, the attribute should
be removed altogether, but for now we make it work for plain libraries,
which do not care about the target platform. In the few cases where the
compilers use this and actually care about the target platform, I'll
manually change them to use `targetPlatform` instead.
In dced724c009a1646475373cc597ada385d46bde6 this derivation was
unexposed along (in all-packages.nix) with the removal of linux 3.18[1].
I think this file was left behind by mistake.
[1]: dced724c00 (diff-036410e9211b4336186fc613f7200b12L11174)
This reverts commit 9f86136cefbd3e050b96a307346278fe9ad8a5bf.
Rust is nowadays required for building Firefox, so the channel updates
are blocked on this.
(It also builds fine for me.)
- `ccWrapperFun` can be used in a few more places instead of
duplicating its definition.
- `ccWrapper` parameter on `wrapCC` is always substituted with
`ccWrapperFun` so just get rid of that parameter.
The new version needs TZ configured to a value other than "UTC" for the test
suite to succeed. Otherwise, an assumption in "reg-tests-1d.R" won't hold that
expects
d <- as.POSIXlt("2016-12-06"); d$zone <- 1; format(d)
to throw an error about an invalid time zone.
