From 25a828190b2a08105ad561b5b417bb61a383fc4f Mon Sep 17 00:00:00 2001
From: Francis Rowe <info@gluglug.org.uk>
Date: Thu, 10 Mar 2016 15:18:49 -0500
Subject: build system: allow arbitrary specification of number of cores used

Use NPROC=foo
Replace "foo" with a number. By default, the build system uses $(nproc).
This patch allows the user to specify any number of cores. This is useful
on some systems, or certain chroot environments.
---
(limited to 'resources/scripts/helpers/build/roms/withgrub_helper')

diff --git a/resources/scripts/helpers/build/roms/withgrub_helper b/resources/scripts/helpers/build/roms/withgrub_helper
index bd1af19..16e861e 100755
--- a/resources/scripts/helpers/build/roms/withgrub_helper
+++ b/resources/scripts/helpers/build/roms/withgrub_helper
@@ -24,6 +24,17 @@
 
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
+if [ -z ${NPROC+x} ]; then
+    cores="$(nproc)"
+else
+    case ${NPROC} in
+        ''|*[!0-9]*)
+            printf "value '%s' for NPROC is invalid. non-numeric. Exiting.\n" "${NPROC}"
+            exit 1
+            ;;
+    esac
+    cores="${NPROC}"
+fi
 
 if (( $# != 1 )); then
 	printf "Usage: ./buildrom-withgrub boardname\n"
@@ -98,7 +109,7 @@ do
 	make clean
 	mv "config_${romtype}" ".config"
 	cp "../../grub_${romtype}.elf" "grub.elf"
-	make -j$(nproc)
+	make -j${cores}
 	rm -f "grub.elf"
 	mv "build/coreboot.rom" "${boardtarget}_${romtype}.rom"
 	# .config no longer needed
--
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