URL: <http://savannah.gnu.org/bugs/?26893>
Summary: parallel build randomly skips intermediate prerequesites Project: make Submitted by: None Submitted on: Fr 26 Jun 2009 07:03:10 UTC Severity: 3 - Normal Item Group: Bug Status: None Privacy: Public Assigned to: None Open/Closed: Open Discussion Lock: Any Component Version: 3.81 Operating System: POSIX-Based Fixed Release: None _______________________________________________________ Details: I experience failues with parallel make on my dual-core laptop machine (GNU/Linux, x86-64). I faintly remember something similar on Solaris/x86-64 on a 16-core box, but I dismissed it as artefact of the not well-synched clocks we have there between NFS filesystems. I'll try to check this. Anyway, problem is: I have a Fortran 90/95 project that contains .F90 files that need preprocessing to .f90 before being compiled to .o . Excerpt from the Makefile (I'll attach it, it is not that big): .SUFFIXES: .SUFFIXES: .F90 .f90 .o %.bin: %.o $(LINK) -o $@ $(shell perl f90dep.pl link "$<") $(LIBS) .F90.f90: $(PREPROCESS) $< > $@ .f90.o: $(COMPILE) -c -o $@ $< I also have Makefile snippets that contain dependency information in .deps/ (they are auto-generated by the Makefile, but already up to date for the situation at hand). Now, when I build a set of targets (final .bin programs), one intermediate .f90 file may not be generated and the build fails on the subsequent .o file, when running make with -j5 (could not reproduce with -j2 now). This occurs with some randomness, sometimes the build works, sometimes not. Single make is always fine, so I assume I got the rules and dependencies right. I hope the to-be-attached logs shed some light on this. Parallel make prunes misc/multiindex.f90 while single make builds it... _______________________________________________________ File Attachments: ------------------------------------------------------- Date: Fr 26 Jun 2009 07:03:11 UTC Name: make.log Size: 269kB By: None Makefile and logs for single and parallel build, make clean has been executed before each build. <http://savannah.gnu.org/bugs/download.php?file_id=18327> ------------------------------------------------------- Date: Fr 26 Jun 2009 07:03:11 UTC Name: make-single.log Size: 210kB By: None Makefile and logs for single and parallel build, make clean has been executed before each build. <http://savannah.gnu.org/bugs/download.php?file_id=18328> ------------------------------------------------------- Date: Fr 26 Jun 2009 07:03:10 UTC Name: Makefile Size: 1kB By: None Makefile and logs for single and parallel build, make clean has been executed before each build. <http://savannah.gnu.org/bugs/download.php?file_id=18326> _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?26893> _______________________________________________ Nachricht geschickt von/durch Savannah http://savannah.gnu.org/ _______________________________________________ Bug-make mailing list Bug-make@gnu.org http://lists.gnu.org/mailman/listinfo/bug-make