build: add a config option for passing the top-level make jobserver to packages that have parallel build enabled, significantly improves parallelization and gets rid of CPU overcommit during intra-package parallel builds

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33414 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 10 insertions, 1 deletions

diff --git a/Config.in b/Config.in
index 403597804..36ca48881 100644
--- a/Config.in
+++ b/Config.in
@@ -311,12 +311,21 @@ menu "Global build settings"
 
 		  If you are unsure, select N.
 
+	config PKG_BUILD_USE_JOBSERVER
+		bool
+		prompt "Use top-level make jobserver for packages"
+		depends on PKG_BUILD_PARALLEL
+		default y
+		help
+		  This passes the main make process jobserver fds to package builds,
+		  enabling full parallelization across different packages
+
 	config PKG_BUILD_JOBS
 		int
 		prompt "Number of package submake jobs (2-512)"
 		range 2 512
 		default 2
-		depends on PKG_BUILD_PARALLEL
+		depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
 		help
 		  The number of jobs (-jX) to pass to packages submake.