mirror of
https://github.com/NixOS/nixpkgs.git
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55e6303d6a
Some packages in the llvm suite (e.g. compiler-rt) cannot be built separate from the build of llvm, and while some others (e.g. clang) can the combined build is much better tested (we've had to work around annoying issues before). So this puts llvm, clang, clang-tools-extra, compiler-rt, lld, lldb, and polly all into one big build (llvmFull). This build includes a static llvm, as dynamic is similarly less tested and has known failures. This also updates libc++ and dragonegg. libc++ now builds against libc++abi as a separate package rather than building it during the libc++ build. The clang purity patch is gone. Instead, we simply set --sysroot to /var/empty for pure builds, as all impure paths are either looked up in the gcc prefix (which we hard-code at compile time) or in the sysroot. This also means that if NIX_ENFORCE_PURITY is 0 then clang will look in the normal Linux paths by default, which is the proper behavior IMO. polly required an updated isl. When stdenv-updates is merged, perhaps we can update the isl used by gcc and avoid having two versions. Since llvm on its own is now separate from the llvm used by clang, I've removed myself as maintainer from llvm and will leave maintenance of that to those who are interested in llvm separate from clang. Signed-off-by: Shea Levy <shea@shealevy.com>
138 lines
4 KiB
Bash
138 lines
4 KiB
Bash
source $stdenv/setup
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mkdir -p $out/bin
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mkdir -p $out/nix-support
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if test -z "$nativeLibc"; then
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dynamicLinker="$libc/lib/$dynamicLinker"
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echo $dynamicLinker > $out/nix-support/dynamic-linker
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if test -e $libc/lib/32/ld-linux.so.2; then
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echo $libc/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
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fi
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# The "-B$libc/lib/" flag is a quick hack to force clang to link
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# against the crt1.o from our own glibc, rather than the one in
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# /usr/lib. (This is only an issue when using an `impure'
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# compiler/linker, i.e., one that searches /usr/lib and so on.)
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echo "-B$libc/lib/ -idirafter $libc/include" > $out/nix-support/libc-cflags
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echo "-L$libc/lib" > $out/nix-support/libc-ldflags
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# The dynamic linker is passed in `ldflagsBefore' to allow
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# explicit overrides of the dynamic linker by callers to clang/ld
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# (the *last* value counts, so ours should come first).
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echo "-dynamic-linker $dynamicLinker" > $out/nix-support/libc-ldflags-before
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fi
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if test -n "$nativeTools"; then
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clangPath="$nativePrefix/bin"
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ldPath="$nativePrefix/bin"
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else
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basePath=`echo $gcc/lib/*/*/*`
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# Need libgcc until the llvm compiler-rt library is complete
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clangLDFlags="$clangLDFlags -L$basePath"
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if test -e "$gcc/lib64"; then
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clangLDFlags="$clangLDFlags -L$gcc/lib64"
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else
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clangLDFlags="$clangLDFlags -L$gcc/lib"
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fi
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clangLDFlags="$clangLDFlags -L$clang/lib"
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echo "$clangLDFlags" > $out/nix-support/clang-ldflags
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# Need files like crtbegin.o from gcc
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# It's unclear if these will ever be provided by an LLVM project
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clangCFlags="$clangCFlags -B$basePath"
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clangCFlags="$clangCFlags -isystem$clang/lib/clang/$clangVersion/include"
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echo "$clangCFlags" > $out/nix-support/clang-cflags
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clangPath="$clang/bin"
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ldPath="$binutils/bin"
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fi
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doSubstitute() {
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local src=$1
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local dst=$2
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local uselibcxx=
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local uselibcxxabi=
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if test -n "$libcxx" && echo $dst | fgrep ++; then uselibcxx=$libcxx; fi
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if test -n "$libcxxabi" && echo $dst | fgrep ++; then uselibcxxabi=$libcxxabi; fi
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# Can't use substitute() here, because replace may not have been
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# built yet (in the bootstrap).
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sed \
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-e "s^@out@^$out^g" \
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-e "s^@shell@^$shell^g" \
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-e "s^@libcxx@^$uselibcxx^g" \
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-e "s^@libcxxabi@^$uselibcxxabi^g" \
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-e "s^@clang@^$clang^g" \
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-e "s^@clangProg@^$clangProg^g" \
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-e "s^@binutils@^$binutils^g" \
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-e "s^@coreutils@^$coreutils^g" \
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-e "s^@libc@^$libc^g" \
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-e "s^@ld@^$ldPath/ld^g" \
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< "$src" > "$dst"
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}
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# Make wrapper scripts around clang and clang++. Also make symlinks
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# cc and c++
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mkClangWrapper() {
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local dst=$1
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local src=$2
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if ! test -f "$src"; then
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echo "$src does not exist (skipping)"
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return 1
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fi
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clangProg="$src"
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doSubstitute "$clangWrapper" "$dst"
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chmod +x "$dst"
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}
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if mkClangWrapper $out/bin/clang $clangPath/clang
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then
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ln -sv clang $out/bin/cc
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fi
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if mkClangWrapper $out/bin/clang++ $clangPath/clang++
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then
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ln -sv clang++ $out/bin/c++
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fi
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# Create a symlink to as (the assembler). This is useful when a
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# clang-wrapper is installed in a user environment, as it ensures that
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# the right assembler is called.
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ln -s $ldPath/as $out/bin/as
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# Make a wrapper around the linker.
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doSubstitute "$ldWrapper" "$out/bin/ld"
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chmod +x "$out/bin/ld"
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# Emit a setup hook. Also store the path to the original Clang and
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# libc.
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test -n "$clang" && echo $clang > $out/nix-support/orig-clang
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test -n "$libc" && echo $libc > $out/nix-support/orig-libc
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doSubstitute "$addFlags" "$out/nix-support/add-flags.sh"
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doSubstitute "$setupHook" "$out/nix-support/setup-hook"
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cp -p $utils $out/nix-support/utils.sh
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# Propagate the wrapped clang so that if you install the wrapper, you get
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# llvm tools, the manpages, etc. as well (including for binutils
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# and Glibc).
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if test -z "$nativeTools"; then
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echo $clang $binutils $libc > $out/nix-support/propagated-user-env-packages
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fi
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