conduwuit-mirror/nix/pkgs/main/cross-compilation-env.nix
strawberry b73d558cba
start producing haswell target optimised x86 binaries for rocksdb fast CRC32 support
Signed-off-by: strawberry <strawberry@puppygock.gay>
2024-12-13 01:57:45 -05:00

87 lines
2.3 KiB
Nix

{ lib
, pkgsBuildHost
, rust
, stdenv
}:
lib.optionalAttrs stdenv.hostPlatform.isStatic {
ROCKSDB_STATIC = "";
}
//
{
CARGO_BUILD_RUSTFLAGS =
lib.concatStringsSep
" "
([]
# This disables PIE for static builds, which isn't great in terms
# of security. Unfortunately, my hand is forced because nixpkgs'
# `libstdc++.a` is built without `-fPIE`, which precludes us from
# leaving PIE enabled.
++ lib.optionals
stdenv.hostPlatform.isStatic
[ "-C" "relocation-model=static" ]
++ lib.optionals
(stdenv.buildPlatform.config != stdenv.hostPlatform.config)
[
"-l"
"c"
"-l"
"stdc++"
"-L"
"${stdenv.cc.cc.lib}/${stdenv.hostPlatform.config}/lib"
]
);
}
# What follows is stolen from [here][0]. Its purpose is to properly
# configure compilers and linkers for various stages of the build, and
# even covers the case of build scripts that need native code compiled and
# run on the build platform (I think).
#
# [0]: https://github.com/NixOS/nixpkgs/blob/nixpkgs-unstable/pkgs/build-support/rust/lib/default.nix#L48-L68
//
(
let
inherit (rust.lib) envVars;
in
lib.optionalAttrs
(stdenv.targetPlatform.rust.rustcTarget
!= stdenv.hostPlatform.rust.rustcTarget)
(
let
inherit (stdenv.targetPlatform.rust) cargoEnvVarTarget;
in
{
"CC_${cargoEnvVarTarget}" = envVars.ccForTarget;
"CXX_${cargoEnvVarTarget}" = envVars.cxxForTarget;
"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" = envVars.ccForTarget;
}
)
//
(
let
inherit (stdenv.hostPlatform.rust) cargoEnvVarTarget rustcTarget;
in
{
"CC_${cargoEnvVarTarget}" = envVars.ccForHost;
"CXX_${cargoEnvVarTarget}" = envVars.cxxForHost;
"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" = envVars.ccForHost;
CARGO_BUILD_TARGET = rustcTarget;
}
)
//
(
let
inherit (stdenv.buildPlatform.rust) cargoEnvVarTarget;
in
{
"CC_${cargoEnvVarTarget}" = envVars.ccForBuild;
"CXX_${cargoEnvVarTarget}" = envVars.cxxForBuild;
"CARGO_TARGET_${cargoEnvVarTarget}_LINKER" = envVars.ccForBuild;
HOST_CC = "${pkgsBuildHost.stdenv.cc}/bin/cc";
HOST_CXX = "${pkgsBuildHost.stdenv.cc}/bin/c++";
}
)
)