From 00f7535f329fd7d1b68a65d3c2db7fbb6c2d1756 Mon Sep 17 00:00:00 2001
From: Bill Hollings <bill.hollings@brenwill.com>
Date: Wed, 23 Sep 2020 14:55:13 -0400
Subject: [PATCH] fetchDependencies builds serially by default.

Building in parallel does not significantly improve performance, and makes it
more difficult to integrate calling fetchDependencies from a larger build script,
because of the need to trap and kill child processes on an error.
---
 fetchDependencies | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/fetchDependencies b/fetchDependencies
index 28bd8d79..f34c0fcd 100755
--- a/fetchDependencies
+++ b/fetchDependencies
@@ -37,8 +37,11 @@
 #              Build the external libraries in Debug mode, which may be useful when debugging
 #              and tracing calls into those libraries.
 #
+#      --parallel-build
+#              Build the external libraries in parallel using background processes.
+#
 #      --no-parallel-build
-#              Build the external libraries serially instead of in parallel using background processes.
+#              Build the external libraries serially instead of in parallel. This is the default.
 #
 #      --glslang-root path
 #              "path" specifies a directory path to a KhronosGroup/glslang repository.
@@ -79,7 +82,7 @@ BLD_MACOS=""
 BLD_SPECIFIED=""
 XC_CONFIG="Release"
 XC_BUILD_VERBOSITY="-quiet"
-XC_USE_BCKGND="Y"
+XC_USE_BCKGND=""
 V_HEADERS_ROOT=""
 SPIRV_CROSS_ROOT=""
 GLSLANG_ROOT=""
@@ -130,6 +133,10 @@ while (( "$#" )); do
          XC_CONFIG="Debug"
          shift 1
          ;;
+       --parallel-build)
+         XC_USE_BCKGND="Y"
+         shift 1
+         ;;
        --no-parallel-build)
          XC_USE_BCKGND=""
          shift 1