Commit 2afb23a7 authored by Fabio Porcedda's avatar Fabio Porcedda Committed by Peter Korsgaard
Browse files

Makefile: update comment about top-level parallel Makefile 



After the latest patches top-level parallel Makefile is working but
there is still an issue when a package has an unspecified optional
dependency so change the comment to explain that.

Signed-off-by: default avatarFabio Porcedda <fabio.porcedda@gmail.com>
Signed-off-by: default avatarPeter Korsgaard <peter@korsgaard.com>
parent 069b33a3

Makefile

+14 −1
Original line number Diff line number Diff line
@@ -42,7 +42,20 @@ export HOSTARCH := $(shell uname -m | \ 
	    -e s/macppc/powerpc/\

	    -e s/sh.*/sh/)



# This top-level Makefile can *not* be executed in parallel

# Parallel execution of this Makefile is disabled because it changes

# the packages building order, that can be a problem for two reasons:

# - If a package has an unspecified optional dependency and that

#   dependency is present when the package is built, it is used,

#   otherwise it isn't (but compilation happily proceeds) so the end

#   result will differ if the order is swapped due to parallel

#   building.

# - Also changing the building order can be a problem if two packages

#   manipulate the same file in the target directory.

#

# Taking into account the above considerations, if you still want to execute

# this top-level Makefile in parallel comment the ".NOTPARALLEL" line and

# build using the following command:

#	make BR2_JLEVEL= -j$((`getconf _NPROCESSORS_ONLN`+1))

.NOTPARALLEL:



# absolute path