On Thu, Apr 05, 2007 at 02:05:53PM +0100, Glynn Clements wrote: > > [EMAIL PROTECTED] wrote: > > > code I item #359, was opened at 2007-04-05 12:01 > > Status: Open > > Priority: 4 > > Submitted By: Maciej Sieczka (msieczka) > > Assigned to: Nobody (None) > > Summary: GRASS fails to build with make -j3 > > Issue type: other bug > > Issue status: None > > GRASS version: CVS HEAD > > GRASS component: build > > Operating system: all > > Operating system version: > > GRASS CVS checkout date, if applies (YYMMDD): 050407 > > > > > > Initial Comment: > > On multi cpu machines it is possible to speed up compilation time > > greatly using the -j switch with make (eg. -j3 for 2 cpus). > > > > make -j3 works fine on my dual core Intel with all the software I'm > > building from source (including eg. PROJ, GEOS, HDF4, POSTGIS, GDAL, > > QT4). > > > > But when I build GRASS with make -j3, plenty of errors crop out > > after "Waiting for unfinished jobs...." information. In a result, no > > single GRASS module is build properly. However, GRASS builds fine on > > the same machine if -j3 is not used. > > > > configure and make logs attached. > > The first thing I notice is that the first error is usually a missing > header file, e.g.: > > copy.c:7:28: error: grass/datetime.h: No such file or directory > > adj_cellhd.c:14:23: error: grass/gis.h: No such file or directory > > This is due to the "headers" target in the "libs" directory being run > in parallel with other jobs. > > > This specific issue can probably be solved by changing lib/Makefile > from: > > default: headers subdirs > to: > > default: subdirs > > subdirs: headers > > This should prevent the subdirs target from being run before the > headers target has completed. > > However: I'm not sure whether parallel make will actually be useful > with the existing Makefiles, due to the use of a shell "for" loop for > building subdirectories: > > subdirs: > @list='$(SUBDIRS)'; \ > for subdir in $$list; do \ > echo $$subdir ; \ > $(MAKE) -C $$subdir || echo $(CURDIR)/$$subdir >> > $(GRASS_HOME)/error.log; \ > done > > [From include/Make/Dir.make] > > To have the subdirectories built in parallel, you would need to use > something like: > > .PHONY: subdirs $(SUBDIRS) > > subdirs: $(SUBDIRS) > > $(SUBDIRS): > $(MAKE) -C $@
I am interested to get this working but failed to get the second part in include/Make/Dir.make successfully running. Any further hints? My Makefile knowledge is fairly limited unfortunately. Markus _______________________________________________ grass-dev mailing list [email protected] http://grass.itc.it/mailman/listinfo/grass-dev
