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Fix Nix flake being incompatible with Clang built kernels. #99

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shibahaczix wants to merge 3 commits into from
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Fix Nix flake being incompatible with Clang built kernels. #99

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5366c0e
Fixed clang compatibility
shibahaczix Apr 20, 2026
d2f5263
stdenv.cc.cc.lib -> pkgs.stdenv.cc.cc
shibahaczix Apr 20, 2026
1763a26
Added CC and CXX to postBuild
shibahaczix Apr 20, 2026
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36 changes: 25 additions & 11 deletions nix/package.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,6 @@
pkgs @ {
lib,
bash,
stdenv,
coreutils,
writeShellScript,
makeDesktopItem,
Expand All @@ -12,6 +11,7 @@ pkgs @ {
}:

let
stdenv = pkgs.llvmPackages_21.stdenv;
mkPackage = overrides @ {
kernel,
...
Expand All @@ -29,25 +29,39 @@ let
makeWrapper
autoPatchelfHook
copyDesktopItems
llvmPackages_21.clang-unwrapped
llvmPackages_21.lld
llvmPackages_21.llvm
];
buildInputs = [
stdenv.cc.cc.lib
pkgs.stdenv.cc.cc
pkgs.glfw3
];

makeFlags = kernelModuleMakeFlags ++ [
"KBUILD_OUTPUT=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
"-C"
"${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
"M=$(sourceRoot)/driver"
];
makeFlags = [
"LLVM=1"
"LLVM_IAS=1"

"CC=${pkgs.llvmPackages_21.clang-unwrapped}/bin/clang"
"HOSTCC=${pkgs.llvmPackages_21.clang-unwrapped}/bin/clang"

"LD=ld.lld"
"HOSTLD=ld.lld"

"-C"
"${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
"M=$(sourceRoot)/driver"
];

LD_LIBRARY_PATH = "/run/opengl-driver/lib:${lib.makeLibraryPath buildInputs}";


postBuild = ''
make "-j$NIX_BUILD_CORES" -C $sourceRoot/gui "M=$sourceRoot/gui" \
"LIBS=-lglfw -lGL" \
"CXXFLAGS=-Wno-sign-compare -Wno-unused-function -Wno-return-type -isystem $sourceRoot/gui/External"
make -j$NIX_BUILD_CORES -C $sourceRoot/gui \
CC=${pkgs.stdenv.cc}/bin/cc \
CXX=${pkgs.stdenv.cc}/bin/c++ \
LIBS="-lglfw -lGL" \
CXXFLAGS="-std=c++17 -isystem $sourceRoot/gui/External"
'';

postInstall = let
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