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source $stdenv/setup
mkdir -p $out/bin
mkdir -p $out/nix-support
if test -z "$nativeLibc"; then
dynamicLinker="$libc/lib/$dynamicLinker"
echo $dynamicLinker > $out/nix-support/dynamic-linker
if test -e $libc/lib/32/ld-linux.so.2; then
echo $libc/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
fi
# The "-B$libc/lib/" flag is a quick hack to force clang to link
# against the crt1.o from our own glibc, rather than the one in
# /usr/lib. (This is only an issue when using an `impure'
# compiler/linker, i.e., one that searches /usr/lib and so on.)
echo "-B$libc/lib/ -idirafter $libc/include" > $out/nix-support/libc-cflags
echo "-L$libc/lib" > $out/nix-support/libc-ldflags
# The dynamic linker is passed in `ldflagsBefore' to allow
# explicit overrides of the dynamic linker by callers to clang/ld
# (the *last* value counts, so ours should come first).
echo "-dynamic-linker $dynamicLinker" > $out/nix-support/libc-ldflags-before
fi
if test -n "$nativeTools"; then
clangPath="$nativePrefix/bin"
ldPath="$nativePrefix/bin"
else
basePath=`echo $gcc/lib/*/*/*`
# Need libgcc until the llvm compiler-rt library is complete
clangLDFlags="$clangLDFlags -L$basePath"
if test -e "$gcc/lib64"; then
clangLDFlags="$clangLDFlags -L$gcc/lib64"
else
clangLDFlags="$clangLDFlags -L$gcc/lib"
fi
clangLDFlags="$clangLDFlags -L$clang/lib"
echo "$clangLDFlags" > $out/nix-support/clang-ldflags
# Need files like crtbegin.o from gcc
# It's unclear if these will ever be provided by an LLVM project
clangCFlags="$clangCFlags -B$basePath"
clangCFlags="$clangCFlags -isystem$clang/lib/clang/$clangVersion/include"
echo "$clangCFlags" > $out/nix-support/clang-cflags
clangPath="$clang/bin"
ldPath="$binutils/bin"
fi
doSubstitute() {
local src=$1
local dst=$2
local uselibcxx=
local uselibcxxabi=
if test -n "$libcxx" && echo $dst | fgrep ++; then uselibcxx=$libcxx; fi
if test -n "$libcxxabi" && echo $dst | fgrep ++; then uselibcxxabi=$libcxxabi; fi
# Can't use substitute() here, because replace may not have been
# built yet (in the bootstrap).
sed \
-e "s^@out@^$out^g" \
-e "s^@shell@^$shell^g" \
-e "s^@libcxx@^$uselibcxx^g" \
-e "s^@libcxxabi@^$uselibcxxabi^g" \
-e "s^@clang@^$clang^g" \
-e "s^@clangProg@^$clangProg^g" \
-e "s^@binutils@^$binutils^g" \
-e "s^@coreutils@^$coreutils^g" \
-e "s^@libc@^$libc^g" \
-e "s^@ld@^$ldPath/ld^g" \
< "$src" > "$dst"
}
# Make wrapper scripts around clang and clang++. Also make symlinks
# cc and c++
mkClangWrapper() {
local dst=$1
local src=$2
if ! test -f "$src"; then
echo "$src does not exist (skipping)"
return 1
fi
clangProg="$src"
doSubstitute "$clangWrapper" "$dst"
chmod +x "$dst"
}
if mkClangWrapper $out/bin/clang $clangPath/clang
then
ln -sv clang $out/bin/cc
fi
if mkClangWrapper $out/bin/clang++ $clangPath/clang++
then
ln -sv clang++ $out/bin/c++
fi
# Create a symlink to as (the assembler). This is useful when a
# clang-wrapper is installed in a user environment, as it ensures that
# the right assembler is called.
ln -s $ldPath/as $out/bin/as
# Make a wrapper around the linker.
doSubstitute "$ldWrapper" "$out/bin/ld"
chmod +x "$out/bin/ld"
# Emit a setup hook. Also store the path to the original Clang and
# libc.
test -n "$clang" && echo $clang > $out/nix-support/orig-clang
test -n "$libc" && echo $libc > $out/nix-support/orig-libc
doSubstitute "$addFlags" "$out/nix-support/add-flags.sh"
doSubstitute "$setupHook" "$out/nix-support/setup-hook"
cp -p $utils $out/nix-support/utils.sh
# Propagate the wrapped clang so that if you install the wrapper, you get
# llvm tools, the manpages, etc. as well (including for binutils
# and Glibc).
if test -z "$nativeTools"; then
echo $clang $binutils $libc > $out/nix-support/propagated-user-env-packages
fi
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