Fil-C on Nix

Filnix wiki

mbrock/filnix

packages/optfil/default.nix

Fil-C at /opt/fil for ordinary x86-64 Linux systems, in the layout of upstream's optfil distribution: the filcc and fil++ compiler with its runtime, glibc, libc++ and headers, and memory-safe programs and libraries.

The tree is the Nix closure of all that, with every store path rewritten in place to a path under /opt/fil of the same length (mkprefix.py). The toolchain and the packages in merged land directly in /opt/fil, the way upstream lays them out; the rest of the closure lands in /opt/fil/s.

λpkgs, pkgsFilc, filcc, sarcasm
let
17inherit pkgs
lib
18release=
lib.importJSON../../lib/filc-upstream.json.release
uses lib used by name
19name=
"optfil-${release}-filnix-x86_64-linux"
uses release used by tree
21components=
filcc.components
used by aliased toolchain
22sysroot=
filcc.libc
used by aliased toolchain
23binutils=
filcc.bintools.bintools
used by toolchain

Programs and libraries in /opt/fil/bin, /opt/fil/lib and /opt/fil/include. Their other dependencies are found in /opt/fil/s. Libraries whose pkg-config files others require are here too, so that, for example, pkg-config --libs libcurl works.

29packages=
with pkgsFilc; bash bison brotli bzip2 coreutils curl diffutils file findutils flex gawk git gnugrep gnum4 gnumake gnused gnutar gzip jq krb5 less libffi libidn2 libpsl lua nano ncurses nghttp2 nghttp3 ngtcp2 openssh openssl perl pkgconf-unwrapped python3 readline rsync sqlite tmux which xz zlib zstd
used by merged
74outputsOf=
p: mapo: p.${o} lib.subtractLists"man" "doc" "devdoc" "info" "debug" p.outputs
uses lib used by merged

The compiler in upstream's layout. Clang uses /opt/fil/lib and /opt/fil/include, and finds ld and sarcasm in /opt/fil/bin, when its executable is in /opt/fil/bin.

89toolchain=
pkgs.runCommand"optfil-toolchain" nativeBuildInputs = pkgs.binutils-unwrapped pkgs.patchelf pkgs.rsync;
mkdir -p $out/bin $out/lib $out/include/c++
filc0=${components.filc0}
# Clang runs on the host's glibc from /opt/fil/s; $ORIGIN/../lib
# would make it search the Fil-C libraries first.
install -m755 $filc0/bin/clang $out/bin/clang-20
strip --strip-debug $out/bin/clang-20
patchelf --set-rpath "$(patchelf --print-rpath $out/bin/clang-20 |
sed 's|\$ORIGIN/../lib:||')" $out/bin/clang-20
for n in filcc fil++ filcpp; do ln -s clang-20 $out/bin/$n; done
cp -r $filc0/lib/clang $out/lib/
for tool in ${binutils}/bin/*; do ln -s $tool $out/bin/; done
ln -s ${sarcasm}/bin/sarcasm $out/bin/sarcasm
ln -s pkgconf $out/bin/pkg-config
rsync -a --chmod=u+w ${sysroot}/lib/ $out/lib/
rsync -a --chmod=u+w ${sysroot}/bin/ $out/bin/
cp ${components.compiler-rt}/lib/* ${components.yolounwind}/lib/* $out/lib/
rsync -a --chmod=u+w --exclude c++ ${sysroot}/include/ $out/include/
cp -r ${sysroot}/include/c++ $out/include/c++/v1
chmod -R u+w $out
install -m644 ${./README.md} $out/README.md
# OpenSSL's directory is /opt/fil/etc/ssl. It reads the Mozilla roots
# from cert.pem and also finds the host's hashed certificates.
mkdir -p $out/etc/ssl
install -m644 ${pkgsFilc.cacert}/etc/ssl/certs/ca-bundle.crt $out/etc/ssl/cert.pem
ln -s /etc/ssl/certs $out/etc/ssl/certs
uses binutils components sysroot used by merged

The toolchain has the files of these.

132aliased=
sysroot components.filc-glibc components.yolo-glibc components.yolo-glibc-impl components.libpizlo components.filc-libcxx components.compiler-rt components.yolounwind pkgs.linuxHeaders
uses components sysroot used by closure tree
144closure=
pkgs.closureInforootPaths = merged ++ aliased;
uses aliased merged used by tree
146tree=
pkgs.runCommand"${name}-tree"
149nativeBuildInputs=
pkgs.python3
150passthru=
inherit toolchain packages merged aliased closure;
mkdir -p $out
python3 ${./mkprefix.py} $out/fil /opt/fil ${closure}/store-paths \
--merge ${toStringmerged} --alias ${toStringaliased}
# pkgconf's compiled-in share/pkgconfig is in its own store path,
# which Nix removes from the binary, so it searches lib/pkgconfig only.
cd $out/fil/lib/pkgconfig
for pc in ../../share/pkgconfig/*.pc; do
[ -e "$(basename $pc)" ] || ln -s $pc .
done
uses aliased closure merged name
in
pkgs.runCommand"${name}.tar.xz"
175nativeBuildInputs=
pkgs.xz
176passthru=
inherit tree toolchain;
tar -C ${tree} --sort=name --mtime=@1 --owner=0 --group=0 --numeric-owner \
--mode=u+w -cf - fil | xz -T$NIX_BUILD_CORES -6 > $out