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darwin/stdenv: refactoring

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Build the llvm support libraries (libcxx, libcxxabi) from scratch
without using the existing llvm libraries. This is the same spirit and
similar implementation as the "useLLVM" bootstrap in llvm package
sets. Critically it avoids having libcxxabi provided by the cc-wrapper
when building libcxx, which otherwise results in two libcxxabi
instances.

$ otool -L /nix/store/vd4vvgs9xngqbjzpg3qc41wl6jh42s9i-libc++-7.1.0/lib/libc++.dylib
/nix/store/vd4vvgs9xngqbjzpg3qc41wl6jh42s9i-libc++-7.1.0/lib/libc++.dylib:
        /nix/store/vd4vvgs9xngqbjzpg3qc41wl6jh42s9i-libc++-7.1.0/lib/libc++.1.0.dylib (compatibility version 1.0.0, current version 1.0.0)
        /nix/store/gmpwk5fyp3iasppqrrdpswxvid6kcp8r-libc++abi-7.1.0/lib/libc++abi.dylib (compatibility version 1.0.0, current version 1.0.0)
        /nix/store/3hn7azynqgp2pm5gpdg45gpq0ia72skg-libc++abi-7.1.0/lib/libc++abi.dylib (compatibility version 1.0.0, current version 1.0.0)
        /nix/store/1nq94scbxs6bk7pimqhvz76q6cfmbv97-Libsystem-osx-10.12.6/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)

Additionally move some utilities (clang, binutils, coreutils, gnugrep)
to the stage layers so they can be replaced before the final
stdenv. This should cause most of stage4 to be built from the
toolchain assembled as of stage3 instead of the bootstrap toolchain.
This commit is contained in:
Andrew Childs
2020-07-31 23:03:51 +09:00
parent 86ee107a15
commit fece3eb2e9
2 changed files with 94 additions and 43 deletions
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5
pkgs/development/compilers/llvm/7/libc++abi.nix
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@@ -1,4 +1,5 @@
{ stdenv, cmake, fetch, libcxx, llvm, version
, standalone ? false
# on musl the shared objects don't build
, enableShared ? ! stdenv.hostPlatform.isMusl }:
@@ -20,7 +21,9 @@ stdenv.mkDerivation {
patch -p1 -d $(ls -d libcxx-*) -i ${../libcxx-0001-musl-hacks.patch}
'';
cmakeFlags = stdenv.lib.optional (!enableShared) "-DLIBCXXABI_ENABLE_SHARED=OFF";
cmakeFlags =
stdenv.lib.optional standalone "-DLLVM_ENABLE_LIBCXX=ON" ++
stdenv.lib.optional (!enableShared) "-DLIBCXXABI_ENABLE_SHARED=OFF";
installPhase = if stdenv.isDarwin
then ''