cctools-llvm is a replacement for cctools that replaces as much of cctools with equivalents from LLVM that it can reasonably do. This was motivated by wanting to reduce dependencies on cctools, which are updated infrequently by upstream.
To provide a motivating example, the version of `strip` included in cctools cannot properly strip the archives in compiler-rt in LLVM 15. Paths are left to bootstrap tools, resulting in failed requisites checks in the final stdenv build. Since `strip` needs replaced, the opportunity was taken to replace other provided they are functional replacements.
Note: This has to be done in cctools (or some equivalent) because some derivations (noteably LLVM) use the bintools of the stdenv directly instead of going through the wrapper.
The following tools from LLVM are not used in this derivation:
* LLD - not fully compatible with ld64 yet and potentially too big of a change;
* libtool - not a drop-in replacement yet because it does not support linker passthrough, which is needed by xcbuild;
* lipo - crashes when running the LLVM test suite;
* install_name_tool - fails when trying to build swift-corefoundation; and.
* randlib - not completely a drop-in replacement, so leaving it out for now.
If other incompatabilities are found, the tools can be reverted or made conditional. For example, cctools `strip` is preferred on older versions of LLVM (which lack the compiler-rt issue) or when cctools itself is a new enough version because `llvm-strip` on LLVM 11 produces files that older verions of `codesign_allocate` cannot process correctly.
One final caveat/note: Some tools are not duplicated or linked from cctools-port. The names of the tools and which ones were linked was determined based on what is provided upstream in Xcode and is installed on macOS system.
passAsFile passes the values of Nix bindings to the builder as
files, so if those values contained references, they wouldn't end up
in the inputDerivation output. To fix that, append the contents of
every such passed file to the output.
We only have shell builtins in this derivation, so we can't use cat.
The only way I know of appending the contents of one file to another
using only shell builtins is as I've done here, but it requires
putting the contents of the file on echo's argv. This might end up
causing problems with large files. Regardless, I think we should try
this, as a failure is better than silently producing an incorrect
result like the previous behavior.
`nix-2.4+` automatically filters `__contentAddressed` out of the
environment. But not `nix-2.3`. This make `.drv` to differ between
unset and `__contentAddressed = false` derivations.
This change makes them equal by filtering out `__contentAddressed`
unless it's set to `true`.
musl now supports RISC-V. Let's centralise musl availability checks
in musl.meta.platforms, so we don't have to keep cleaning up ad-hoc
checks like this all over the tree.
The stdenv wouldn't build with it, as
compiler-rt-libc-11.1.0/lib/darwin/libclang_rt.*_osx.a
retained reference to SDKs (which we forbid for final stdenv).
Assigned authorship to Trofi; I just bisected and added condition.
https://github.com/NixOS/nixpkgs/pull/224669#issuecomment-1518225496
we have managed to migrate to NIX_CFLAGS_COMPILE to the env attrset well
enough that we don't need to support having it toplevel. mkDerivation
will throw if there's a attr in both env and toplevel so no need to
worry about that
I broke `pkgsMusl` with #209870.
Something odd is happening with `xgcc` (the temporary compiler that
should be used only to compile `gcc`, although we are using it to
compile a temporary `patchelf` too) and `libstdc++`.
The temporary fix in this commit is to use `-static-libstdc++` for
the ephemeral `patchelf` built by `xgcc`. It isn't pretty, but it
appears to work.
Incorporates:
- https://github.com/NixOS/nixpkgs/pull/224945
The stage before `xgcc` creates the first compiled patchelf
(i.e. not from bootstrapFiles).
The `xgcc` stage was inadvertently switching *back* to using the
patchelf *from* the bootstrapFiles.
The first commit in this PR adds self-checking comments (assertions)
to make it clear where each stage's patchelf comes from.
The second commit fixes the bug, and updates the self-checking
comments.
