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{ pkgs, ... }:
# https://stackoverflow.com/questions/42136197/how-to-override-compile-flags-for-a-single-package-in-nixos
let
overrideWithFlags = pkg: flags:
pkgs.lib.overrideDerivation pkg (old:
let
newflags = pkgs.lib.foldl' (acc: x: "${acc} ${x}") "" flags;
oldflags = if (pkgs.lib.hasAttr "NIX_CFLAGS_COMPILE" old)
then "${old.NIX_CFLAGS_COMPILE}"
else "";
in
{
NIX_CFLAGS_COMPILE = "${oldflags} ${newflags}";
});
in
{
overrideWithFlags = overrideWithFlags;
optimizeForThisHost = pkg:
overrideWithFlags pkg [ "-O3" "-march=native" "-fPIC" ];
withDebugSymbols = pkg:
overrideWithFlags pkg [ "-DDEBUG" ];
importDirs = path: with builtins;
map (n: import (path + ("/" + n)))
(filter (n: match ".*\\.nix" n != null ||
pathExists (path + ("/" + n + "/default.nix")))
(attrNames (readDir path)));
}
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