54 lines
1.8 KiB
Nix
54 lines
1.8 KiB
Nix
pkgs: stdenv:
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let
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inherit (pkgs) addAttrsToDerivation overrideCC;
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inherit (pkgs.lib) optionalAttrs optionals toList;
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inherit (pkgs.llvmPackages_latest) clang;
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inherit (stdenv) buildPlatform hostPlatform;
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cflagsC = [
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"-pipe" # Prefer pipes over temporary files between stages
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"-O2"
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] ++ optionals buildPlatform.useLLVM [
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"-flto=thin"
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];
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ldflags = [
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"-O2" # Enable tail merging of strings
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"--hash-style=gnu" # Produce only DT_GNU_HASH
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] ++ optionals buildPlatform.useLLVM [
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"--icf=safe" # Fold identical code where safe
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"--lto-O2"
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"--pack-dyn-relocs=relr"
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];
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cflagsL = map (flag: "-Wl,${flag}") ldflags;
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rustflags = [
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"-C opt-level=2"
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] ++ optionals buildPlatform.useLLVM [
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"-C lto=thin"
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"-C linker-plugin-lto"
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] ++ optionals (hostPlatform.isx86_64 && hostPlatform ? gcc.arch) [
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"-C target-cpu=${hostPlatform.gcc.arch}"
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] ++ map (flag: "-C link-arg=${flag}") ldflags;
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in addAttrsToDerivation (base: {
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env = (base.env or { }) // optionalAttrs (!base ? NIX_CFLAGS_COMPILE) {
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NIX_CFLAGS_COMPILE =
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toString (toList base.env.NIX_CFLAGS_COMPILE or [ ] ++ cflagsC);
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} // optionalAttrs (base ? env.NIX_CFLAGS_LINK) {
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NIX_CFLAGS_LINK =
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toString (toList base.NIX_CFLAGS_LINK or [ ] ++ cflagsL);
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} // optionalAttrs (base ? env.NIX_LDFLAGS) {
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NIX_LDFLAGS =
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toString (toList base.env.NIX_LDFLAGS or [ ] ++ ldflags);
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};
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NIX_RUSTFLAGS = toList base.NIX_RUSTFLAGS or [ ] ++ rustflags;
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} // optionalAttrs (base ? env.NIX_CFLAGS) {
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NIX_CFLAGS_COMPILE = toList base.NIX_CFLAGS_COMPILE or [ ] ++ cflagsC;
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} // optionalAttrs (!base ? env.NIX_CFLAGS_LINK) {
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NIX_CFLAGS_LINK = toList base.NIX_CFLAGS_LINK or [ ] ++ cflagsL;
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} // optionalAttrs (!base ? env.NIX_LDFLAGS) {
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NIX_LDFLAGS = toList base.NIX_LDFLAGS or [ ] ++ ldflags;
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}) pkgs.clang18Stdenv
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