withCFlags

pkgs.withCFlags

Docs pulled from | This Revision | 10 minutes ago

Modify a stdenv so that it builds binaries with the specified list of compilerFlags appended and passed to the compiler.

This example would recompile every derivation on the system with -funroll-loops and -O3 passed to each gcc invocation.

Inputs

compilerFlags: 1. Function argument
stdenv: 2. Function argument

Examples

`withCFlags` usage example

nixpkgs.overlays = [
  (self: super: {
    stdenv = super.withCFlags [ "-funroll-loops" "-O3" ] super.stdenv;
  })
];

Noogle detected

Implementation

The following is the current implementation of this function.

withCFlags =
    compilerFlags: stdenv:
    stdenv.override (old: {
      mkDerivationFromStdenv = extendMkDerivationArgs old (args: {
        env = (args.env or { }) // {
          NIX_CFLAGS_COMPILE = toString (args.env.NIX_CFLAGS_COMPILE or "") + " ${toString compilerFlags}";
        };
      });
    });