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nix: parallel rustc frontend in devShell

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Only active within `devShell`; the default `.#jujutsu` package is unaffected
by this change. This somewhat increases CPU utilization and has a marginal
improvement on my local compile times, but it's also nice if you have to
recompile from scratch too.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Change-Id: I07ab28991843ca3723185569db5f38f2ed076875
This commit is contained in:
Austin Seipp 2024-04-04 01:35:05 -05:00
parent 749481e552
commit ad34d10951
1 changed files with 3 additions and 1 deletions
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4
flake.nix
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@ -175,8 +175,10 @@
export RUST_BACKTRACE=1
export ZSTD_SYS_USE_PKG_CONFIG=1
export LIBSSH2_SYS_USE_PKG_CONFIG=1
export RUSTFLAGS="-Zthreads=0"
'' + pkgs.lib.optionalString useMoldLinker ''
export RUSTFLAGS="-C link-arg=-fuse-ld=mold"
export RUSTFLAGS+=" -C link-arg=-fuse-ld=mold"
'' + darwinNextestHack;
};
}));