100 lines
3.2 KiB
Nix
100 lines
3.2 KiB
Nix
{ lib
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, pkgsBuildHost
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, rust
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, stdenv
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}:
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lib.optionalAttrs stdenv.hostPlatform.isStatic {
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ROCKSDB_STATIC = "";
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}
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//
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{
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CARGO_BUILD_RUSTFLAGS =
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lib.concatStringsSep
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" "
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([]
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# This disables PIE for static builds, which isn't great in terms of
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# security. Unfortunately, my hand is forced because nixpkgs'
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# `libstdc++.a` is built without `-fPIE`, which precludes us from
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# leaving PIE enabled.
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++ lib.optionals
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stdenv.hostPlatform.isStatic
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[ "-C" "relocation-model=static" ]
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++ lib.optionals
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(stdenv.buildPlatform.config != stdenv.hostPlatform.config)
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[ "-l" "c" ]
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++ lib.optionals
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# This check has to match the one [here][0]. We only need to set
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# these flags when using a different linker. Don't ask me why, though,
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# because I don't know. All I know is it breaks otherwise.
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#
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# [0]: https://github.com/NixOS/nixpkgs/blob/5cdb38bb16c6d0a38779db14fcc766bc1b2394d6/pkgs/build-support/rust/lib/default.nix#L37-L40
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(
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# Nixpkgs doesn't check for x86_64 here but we do, because I
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# observed a failure building statically for x86_64 without
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# including it here. Linkers are weird.
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(stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isx86_64)
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&& stdenv.hostPlatform.isStatic
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&& !stdenv.isDarwin
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&& !stdenv.cc.bintools.isLLVM
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)
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[
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"-l"
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"stdc++"
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"-L"
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"${stdenv.cc.cc.lib}/${stdenv.hostPlatform.config}/lib"
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]
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);
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}
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# What follows is stolen from [here][0]. Its purpose is to properly configure
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# compilers and linkers for various stages of the build, and even covers the
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# case of build scripts that need native code compiled and run on the build
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# platform (I think).
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#
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# [0]: https://github.com/NixOS/nixpkgs/blob/5cdb38bb16c6d0a38779db14fcc766bc1b2394d6/pkgs/build-support/rust/lib/default.nix#L57-L80
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//
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(
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let
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inherit (rust.lib) envVars;
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in
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lib.optionalAttrs
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(stdenv.targetPlatform.rust.rustcTarget
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!= stdenv.hostPlatform.rust.rustcTarget)
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(
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let
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inherit (stdenv.targetPlatform.rust) cargoEnvVarTarget;
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in
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{
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"CC_${cargoEnvVarTarget}" = envVars.ccForTarget;
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"CXX_${cargoEnvVarTarget}" = envVars.cxxForTarget;
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"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" =
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envVars.linkerForTarget;
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}
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)
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//
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(
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let
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inherit (stdenv.hostPlatform.rust) cargoEnvVarTarget rustcTarget;
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in
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{
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"CC_${cargoEnvVarTarget}" = envVars.ccForHost;
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"CXX_${cargoEnvVarTarget}" = envVars.cxxForHost;
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"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" = envVars.linkerForHost;
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CARGO_BUILD_TARGET = rustcTarget;
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}
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)
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//
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(
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let
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inherit (stdenv.buildPlatform.rust) cargoEnvVarTarget;
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in
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{
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"CC_${cargoEnvVarTarget}" = envVars.ccForBuild;
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"CXX_${cargoEnvVarTarget}" = envVars.cxxForBuild;
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"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" = envVars.linkerForBuild;
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HOST_CC = "${pkgsBuildHost.stdenv.cc}/bin/cc";
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HOST_CXX = "${pkgsBuildHost.stdenv.cc}/bin/c++";
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}
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)
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)
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