nixpkgs/pkgs/development/compilers/llvm/3.7/libc++abi.nix

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{ stdenv, cmake, fetch, fetchpatch, libcxx, libunwind, llvm, version }:
let
# Newer LLVMs (3.8 onwards) have changed how some basic C++ stuff works, which breaks builds of this older version
llvm38-and-above = fetchpatch {
url = "https://trac.macports.org/raw-attachment/ticket/50304/0005-string-Fix-exception-declaration.patch";
sha256 = "1lm38n7s0l5dbl7kp4i49pvzxz1mcvlr2vgsnj47agnwhhm63jvr";
};
in stdenv.mkDerivation {
name = "libc++abi-${version}";
src = fetch "libcxxabi" "0ambfcmr2nh88hx000xb7yjm9lsqjjz49w5mlf6dlxzmj3nslzx4";
nativeBuildInputs = [ cmake ];
buildInputs = stdenv.lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD) libunwind;
postUnpack = ''
unpackFile ${libcxx.src}
unpackFile ${llvm.src}
export NIX_CFLAGS_COMPILE+=" -I$PWD/include"
export cmakeFlags="-DLLVM_PATH=$PWD/$(ls -d llvm-*) -DLIBCXXABI_LIBCXX_INCLUDES=$PWD/$(ls -d libcxx-*)/include"
'' + stdenv.lib.optionalString stdenv.isDarwin ''
export TRIPLE=x86_64-apple-darwin
'';
# I can't use patches directly because this is actually a patch for libc++'s source, which we manually extract
# into the libc++abi build environment above.
prePatch = ''(
cd ../libcxx-*
patch -p1 < ${llvm38-and-above}
)'';
installPhase = if stdenv.isDarwin
then ''
for file in lib/*.dylib; do
# this should be done in CMake, but having trouble figuring out
# the magic combination of necessary CMake variables
# if you fancy a try, take a look at
# http://www.cmake.org/Wiki/CMake_RPATH_handling
install_name_tool -id $out/$file $file
done
make install
install -d 755 $out/include
install -m 644 ../include/*.h $out/include
''
else ''
install -d -m 755 $out/include $out/lib
install -m 644 lib/libc++abi.so.1.0 $out/lib
install -m 644 ../include/cxxabi.h $out/include
ln -s libc++abi.so.1.0 $out/lib/libc++abi.so
ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
'';
meta = {
homepage = http://libcxxabi.llvm.org/;
description = "A new implementation of low level support for a standard C++ library";
license = with stdenv.lib.licenses; [ ncsa mit ];
maintainers = with stdenv.lib.maintainers; [ vlstill ];
platforms = stdenv.lib.platforms.unix;
};
}