core/pkgs/build-support/expand-response-params/default.nix

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{ stdenv, lib }:
# A "response file" is a sequence of arguments that is passed via a
# file, rather than via argv[].
# For more information see:
# https://gcc.gnu.org/wiki/Response_Files
# https://www.intel.com/content/www/us/en/docs/dpcpp-cpp-compiler/developer-guide-reference/2023-0/use-response-files.html
stdenv.mkDerivation {
name = "expand-response-params";
src = ./expand-response-params.c;
strictDeps = true;
enableParallelBuilding = true;
# Work around "stdenv-darwin-boot-2 is not allowed to refer to path
# /nix/store/...-expand-response-params.c"
unpackPhase = ''
cp "$src" expand-response-params.c
src=$PWD
'';
buildPhase = ''
NIX_CC_USE_RESPONSE_FILE=0 "$CC" -std=c99 -O3 -o "expand-response-params" expand-response-params.c
'';
installPhase = ''
mkdir -p $prefix/bin
mv expand-response-params $prefix/bin/
'';
meta = {
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description =
"Internal tool used by the nixpkgs wrapper scripts for processing response files";
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longDescription = ''
expand-response-params is a tool that allows for obtaining a full list of all
arguments passed in a given compiler command line including those passed via
so-called response files. The nixpkgs wrapper scripts for bintools and C
compilers use it for processing compiler flags. As it is developed in
conjunction with the nixpkgs wrapper scripts, it should be considered as
unstable and subject to change.
'';
license = lib.licenses.mit;
platforms = lib.platforms.all;
};
}