From ee112f8f8ce24fa3b885b6d273d6ee3dcd3438af Mon Sep 17 00:00:00 2001
From: Chad Austin <chadaustin@fb.com>
Date: Thu, 20 Jan 2022 13:30:07 -0800
Subject: [PATCH] fix boost build on single-core machines

Summary:
On a single-core Ubuntu VM, getdeps attempts to pass -j0 to Boost Jam,
which fails.

Reviewed By: fanzeyi

Differential Revision: D33675531

fbshipit-source-id: 629ee41448941213aadec10658583d8f984b13c2
---
 build/fbcode_builder/getdeps/buildopts.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build/fbcode_builder/getdeps/buildopts.py b/build/fbcode_builder/getdeps/buildopts.py
index 72ccf721e..cf27e5963 100644
--- a/build/fbcode_builder/getdeps/buildopts.py
+++ b/build/fbcode_builder/getdeps/buildopts.py
@@ -75,7 +75,7 @@ class BuildOptions(object):
         if not num_jobs:
             import multiprocessing
 
-            num_jobs = multiprocessing.cpu_count() // 2
+            num_jobs = max(1, multiprocessing.cpu_count() // 2)
 
         if not install_dir:
             install_dir = os.path.join(scratch_dir, "installed")