swiftc uses cc-wrapper which sets the -march flag on some systems which
breaks the build. This change adds a flag, disableMarch, to cc-wrapper
which disables using the -march flag.
https://github.com/NixOS/nixpkgs/issues/295322
- merge libcxxabi into libcxx for LLVM 12, 13, 14, 15, 16, 17, and git.
- remove the link time workaround `-lc++ -lc++abi` from 58 packages as it is no longer required.
- fixes https://github.com/NixOS/nixpkgs/issues/166205
- provides alternative fixes for. https://github.com/NixOS/nixpkgs/issues/269548https://github.com/NixOS/nix/issues/9640
- pkgsCross.x86_64-freebsd builds work again
This change can be represented in 3 stages
1. merge libcxxabi into libcxx -- files: pkgs/development/compilers/llvm/[12, git]/{libcxx, libcxxabi}
2. update stdenv to account for merge -- files: stdenv.{adapters, cc.wrapper, darwin}
3. remove all references to libcxxabi outside of llvm (about 58 packages modified)
### merging libcxxabi into libcxx
- take the union of the libcxxabi and libcxx cmake flags
- eliminate the libcxx-headers-only package - it was only needed to break libcxx <-> libcxxabi circular dependency
- libcxx.cxxabi is removed. external cxxabi (freebsd) will symlink headers / libs into libcxx.
- darwin will re-export the libcxxabi symbols into libcxx so linking `-lc++` is sufficient.
- linux/freebsd `libc++.so` is a linker script `LINK(libc++.so.1, -lc++abi)` making `-lc++` sufficient.
- libcxx/default.nix [12, 17] are identical except for patches and `LIBCXX_ADDITIONAL_LIBRARIES` (only used in 16+)
- git/libcxx/defaul.nix does not link with -nostdlib when useLLVM is true so flag is removed. this is not much different than before as libcxxabi used -nostdlib where libcxx did not, so libc was linked in anyway.
### stdenv changes
- darwin bootstrap, remove references to libcxxabi and cxxabi
- cc-wrapper: remove c++ link workaround when libcxx.cxxabi doesn't exist (still exists for LLVM pre 12)
- adapter: update overrideLibcxx to account for a pkgs.stdenv that only has libcxx
### 58 package updates
- remove `NIX_LDFLAGS = "-l${stdenv.cc.libcxx.cxxabi.libName}` as no longer needed
- swift, nodejs_v8 remove libcxxabi references in the clang override
https://github.com/NixOS/nixpkgs/pull/292043
Swift uses libc++ 15, but it should really be using the same libc++ from
the stdenv. While not strictly needed currently, Swift 5.9 will support
C++ interop. If Swift is not using the stdenv C++, any C++ library used
with interop would need to be rebuilt against the Swift libc++.
`BOOTSTRAPPING-WITH-HOSTLIBS` is also what official builds use on
Darwin. It's unclear why `BOOTSTRAPPING` was working before, but it is
probably not supported on Darwin to begin with. It was now causing
crashes because of mixing of two copies of stdlib at run-time.
continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
https://hydra.nixos.org/build/123279517
Internally used `compiler-rt` had to be fixed for `glibc-2.31`,
basically the same approach as in the LLVM fix
(7137183bbe05738246be2be0e704c1be9bf19947).
As soon as a newer `compiler-rt` is used for `swift`, this patch can be
removed again.
* simplify versioning
* uniform patch documentation
* reorder phases so they read in order
* reorder scripts for readability
* GNU toolchain dir:
handle sysroot for GNU toolchain like for C headers, so that
GCC_INSTALL_PREFIX is actually used correctly
