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nix: add derivations for C library dependencies

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Cryptsetup and libvirt are new.
OpenSSL was moved with the rest.

The dynamic libaries cryptsetup and libvirt also ship a file called closure.tar,
that contains the transitive closure for all of their dependencies.
This tar file can be used as a container image layer or added to a bootable OS image
to provide the runtime dependencies required for dynamic linking.
Additionally, they ship a `rpath` file. This can be used together with patchelf to
fix the RPATH of binaries produced by Bazel.
This commit is contained in:
Malte Poll 2023-11-23 17:24:54 +01:00
parent e174c4dfe1
commit e895aa5495
4 changed files with 52 additions and 4 deletions
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19
nix/cc/libvirt.nix Normal file
View file

@ -0,0 +1,19 @@
{ pkgs, pkgsLinux, buildEnv, closureInfo }:
let
lib = pkgs.lib;
cc = pkgsLinux.stdenv.cc;
packages = [ pkgsLinux.libvirt ];
closure = builtins.toString (lib.strings.splitString "\n" (builtins.readFile "${closureInfo {rootPaths = packages;}}/store-paths"));
rpath = pkgs.lib.makeLibraryPath [ pkgsLinux.libvirt pkgsLinux.glib pkgsLinux.libxml2 pkgsLinux.readline pkgsLinux.glibc pkgsLinux.libgcc.lib ];
in
pkgs.symlinkJoin {
name = "libvirt";
paths = packages;
buildInputs = packages;
postBuild = ''
tar -cf $out/closure.tar --mtime="@$SOURCE_DATE_EPOCH" --sort=name ${closure}
tar --transform 's+^./+bin/+' -cf $out/bin-linktree.tar --mtime="@$SOURCE_DATE_EPOCH" --sort=name -C $out/bin .
echo "${rpath}" > $out/rpath
cp ${cc}/nix-support/dynamic-linker $out/dynamic-linker
'';
}