with structuredAttrs lists will be bash arrays which cannot be exported
which will be a issue with some patches and some wrappers like cc-wrapper
this makes it clearer that NIX_CFLAGS_COMPILE must be a string as lists
in env cause a eval failure
Always set `SRCTOP`, set it with abs path
llvmPackages: Bump minimum version for FreeBSD
llvmPackages_*, libgcc, compiler_rt: Hack in enough libs that one can compiler C
freebsd.compat: Rename some things to work around cc-wrapper change
0bea4a194f / #191724 in particular
Commit 199b7c50 "compiler-rt: remove <cyclades.h> from libsanitizer"
broke conditional conditional musl patches.
The change has a few effects:
- pkgsStatic.llvmPackages_{5,6,7}.compiler-rt: fix build on musl after cyclades backport
- pkgsStatic.llvmPackages_{{5..13},git}.compiler-rt: drop incomplete musl patches as
sanitizers are disabled anyway and require more upstream porting.
linux-headers-5.13 removed <cyclades.h> along with device support.
Backport a single https://reviews.llvm.org/D102059 upstream change to
fix compiler-rt build.
Use local patches as there is a whitespace change compared to upstream.
This is in an effort to fix the following build failure shown by
chromium:
clang++: error: no such file or directory: '/nix/store/fhd89wrmkx6nflzjk0d6waz70bk3zc4i-clang-wrapper-12.0.0/resource-root/share/cfi_blacklist.txt'
As it turns out a change introduced via the gnu-install-dirs.patch
caused `add_compiler_rt_resource_file` to install resource files to
$dev/include (FULL_INCLUDEDIR) instead of $out/share (FULL_DATADIR)
which in turn meant that the clang wrappers we had didn't link those
files to its resource root at all.
Alternative fix to this would have been to link
compiler-rt.dev/include/*.txt to the wrappers resource-root/share as
well, but since this was handled inconsistently across the patch anyways
(the dfsan list is installed correctly), opt to handle this
consistently within the patch.
llvmPackages_{5,6} install the resource files to a completely different
location and need separate investigation.
The main thing was using `llvm_meta` in all versions.
Secondarily:
- libunwindx7: Forgot to split outputs
- libcxx{,abi} 12: Forgot to apply output-splitting patches.
- simplify `useLLVM` stdenv-switching logic.
- openmp always gets its own directory
- Introduce `preLibcCrossHeaders` to bootstrap libgcc and compiler-rt
the same way.
- Organize LLVM bintools as `bintools{-unwrapped,,NoLibc}` for
consistency with GNU Binutils and Apple's cctools.
- Do Android changes for all `llvmPackages` for consistency.
- Improve the way the default GCC and LLVM versions are selected.
In 7869d16545 I got rid of the symlinking
by forcing `COMPILER_RT_OS_DIR` to always be the empty string. I thought
this was good because it just make compiler-rt be installed in a normal
way.
However, various LLVM tools expect the `COMPILER_RT_OS_DIR` to be set
normally, and fail to find things when they aren't in the expected lib
subdir.
Maybe it would be best to patch that too in the long term, but for now
we just undo this change.
Also begin to start work on cross compilation, though that will have to
be finished later.
The patches are based on the first version of
https://reviews.llvm.org/D99484. It's very annoying to do the
back-porting but the review has uncovered nothing super major so I'm
fine sticking with what I've got.
Beyond making the outputs work, I also strove to re-sync the packages,
as they have been drifting pointlessly apart for some time.
----
Other misc notes, highly incomplete
- lvm-config-native and llvm-config are put in `dev` because they are
tools just for build time.
- Clang no longer has an lld dep. That was introduced in
db29857eb3, but if clang needs help
finding lld when it is used we should just pass it flags / put in the
resource dir. Providing it at build time increases critical path
length for no good reason.
----
A note on `nativeCC`:
`stdenv` takes tools from the previous stage, so:
1. `pkgsBuildBuild`: `(?1, x, x)`
2. `pkgsBuildBuild.stdenv.cc`: `(?0, ?1, x)`
while:
1. `pkgsBuildBuild`: `(?1, x, x)`
2. `pkgsBuildBuild.targetPackages`: `(x, x, ?2)`
3. `pkgsBuildBuild.targetPackages.stdenv.cc`: `(?1, x, x)`
