From 52880ba9e95ec6532b76d530d2ed2c58130b94ef Mon Sep 17 00:00:00 2001
From: Andy Fingerhut <andy.fingerhut@gmail.com>
Date: Tue, 29 Oct 2019 09:33:29 -0700
Subject: [PATCH] Reduce memory requirements for installing p4c by 'vagrant up'
 (#299)

---
 vm/user-bootstrap.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/vm/user-bootstrap.sh b/vm/user-bootstrap.sh
index 421cd1d..c2ac21d 100755
--- a/vm/user-bootstrap.sh
+++ b/vm/user-bootstrap.sh
@@ -102,7 +102,12 @@ git submodule update --init --recursive
 mkdir -p build
 cd build
 cmake ..
-make -j${NUM_CORES}
+# The command 'make -j${NUM_CORES}' works fine for the others, but
+# with 2 GB of RAM for the VM, there are parts of the p4c build where
+# running 2 simultaneous C++ compiler runs requires more than that
+# much memory.  Things work better by running at most one C++ compilation
+# process at a time.
+make -j1
 sudo make install
 sudo ldconfig
 cd ../..