From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Tue, 25 Aug 2015 12:17:36 +0200 Subject: [Buildroot] [PATCH] package/canfestival: don't build in parallel In-Reply-To: <1440279290-18408-1-git-send-email-yann.morin.1998@free.fr> References: <1440279290-18408-1-git-send-email-yann.morin.1998@free.fr> Message-ID: <20150825121736.0d3982d4@free-electrons.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Yann, On Sat, 22 Aug 2015 23:34:50 +0200, Yann E. MORIN wrote: > The Makefiles for canfestival are not correctly written, which leads to > multiple warnings such as: > > make[4]: warning: jobserver unavailable: using -j1. Add `+' to parent make rule. > > Since canfestival is relatively small, it builds in less than 6s here > when not in parallell, while a parallel build takes 5s. > > Just disable parallel build to avoid future surprises. > > Signed-off-by: "Yann E. MORIN" Do you actually understand why make is displaying those warning messages in the first place? From what I understood from the make manual, it typically happens when you call "make" directly for a subdirectory instead of using $(MAKE). A quick test on a simple example seems to confirm that. However, I see that canfestival seems to be using $(MAKE) everywhere, so I don't see why make decides that the jobserver is not available. Thanks, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com