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| author | Eelco Dolstra <edolstra@gmail.com> | 2017-02-21 14:53:16 +0100 |
|---|---|---|
| committer | Eelco Dolstra <edolstra@gmail.com> | 2017-02-21 15:08:54 +0100 |
| commit | acb2acf1f5466f2db93fcab727b294b2eeb35844 (patch) | |
| tree | 285dc3e312c3fb0394636e06f677a087b7642566 /pkgs/build-support/vm | |
| parent | 012b5a5c45d2e5b0e690936cd71c8be727047914 (diff) | |
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VM builds: Use -smp when enableParallelBuilding is set
Diffstat (limited to 'pkgs/build-support/vm')
| -rw-r--r-- | pkgs/build-support/vm/default.nix | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix index 5bac650215b..203310f624e 100644 --- a/pkgs/build-support/vm/default.nix +++ b/pkgs/build-support/vm/default.nix @@ -242,6 +242,14 @@ rec { eval "$preVM" + if [ "$enableParallelBuilding" = 1 ]; then + if [ ''${NIX_BUILD_CORES:-0} = 0 ]; then + QEMU_OPTS+=" -smp cpus=$(nproc)" + else + QEMU_OPTS+=" -smp cpus=$NIX_BUILD_CORES" + fi + fi + # Write the command to start the VM to a file so that the user can # debug inside the VM if the build fails (when Nix is called with # the -K option to preserve the temporary build directory). |