Circular dependency dropping error
Hi! Using make version 3.79.1, on Linux 2.2.16 with glibc-2.1.2. Trying to write a makefile for the netpbm utilities http://sourceforge.net/project/?group_id=5128 to convert between any two graphics formats. % ls -la asdf.gif asdf.gif % make asdf.png make: *** No rule to make target `asdf.png'. Stop. % make asdf.ppm make: Circular asdf.bmp - asdf.ppm dependency dropped. ppmtobmpasdf.bmp /bin/sh: -c: line 1: syntax error near unexpected token `' /bin/sh: -c: line 1: `ppmtobmpasdf.bmp' make: *** [asdf.bmp] Error 2 % giftopnm asdf.gif | ppmtoxpm asdf.xpm % rm asdf.gif % make asdf.png make: Circular asdf.xpm - asdf.ppm dependency dropped. xpmtoppm asdf.xpm asdf.ppm pnmtopng asdf.ppm asdf.png rm asdf.ppm % ls asdf.* asdf.png asdf.xpm % Anyway, yes, perhaps I'm stretching 'make' too far, but I'm strongly encouraged by the fact that this works some of the time! It appears that the wrong dependency in a circular dependency gets dropped, and also the value of $ gets clobbered. Is this a bug in make, the makefile, or the author of the makefile? Anyways, here's the makefile: - # Convert from ppm %.acad : %.ppm ppmtoacad $ $@ %.bmp : %.ppm ppmtobmp $ $@ %.eyuv : %.ppm ppmtoeyuv $ $@ %.gif : %.ppm ppmquant 256 $ | ppmtogif $@ %.icr : %.ppm ppmtoicr $ $@ %.ilbm : %.ppm ppmquant 32 $ | ppmtoilbm $@ %.jpeg : %.ppm ppmtojpeg $ $@ %.leaf : %.ppm ppmtoleaf $ $@ %.map : %.ppm ppmtomap $ $@ %.mitsu : %.ppm ppmtomitsu $ $@ %.pcx : %.ppm ppmtopcx $ $@ %.pgm : %.ppm ppmtopgm $ $@ %.pi1 : %.ppm ppmtopi1 $ $@ %.pict : %.ppm ppmtopict $ $@ %.pj : %.ppm ppmtopj $ $@ %.pjxl : %.ppm ppmtopjxl $ $@ %.puzz : %.ppm ppmtopuzz $ $@ %.rgb3 : %.ppm ppmtorgb3 $ $@ %.sixel : %.ppm ppmtosixel $ $@ %.tga : %.ppm ppmtotga $ $@ %.uil : %.ppm ppmtouil $ $@ %.winicon : %.ppm ppmtowinicon $ $@ %.xpm : %.ppm ppmquant 256 $ | ppmtoxpm $@ %.yuv : %.ppm ppmtoyuv $ $@ %.yuvsplit : %.ppm ppmtoyuvsplit $ $@ %.png : %.ppm pnmtopng $ $@ # Convert to ppm %.ppm : %.bmp bmptoppm $ $@ %.ppm : %.eyuv eyuvtoppm $ $@ %.ppm : %.gould gouldtoppm $ $@ %.ppm : %.hpcd hpcdtoppm $ $@ %.ppm : %.ilbm ilbmtoppm $ $@ %.ppm : %.img imgtoppm $ $@ %.ppm : %.leaf leaftoppm $ $@ %.ppm : %.mtv mtvtoppm $ $@ %.ppm : %.pcx pcxtoppm $ $@ %.ppm : %.pgm pgmtoppm $ $@ %.ppm : %.pi1 pi1toppm $ $@ %.ppm : %.pict picttoppm $ $@ %.ppm : %.pj pjtoppm $ $@ %.ppm : %.qrt qrttoppm $ $@ %.ppm : %.raw rawtoppm $ $@ %.ppm : %.rgb3 rgb3toppm $ $@ %.ppm : %.sld sldtoppm $ $@ %.ppm : %.spc spctoppm $ $@ %.ppm : %.spu sputoppm $ $@ %.ppm : %.tga tgatoppm $ $@ %.ppm : %.winicon winicontoppm $ $@ %.ppm : %.xim ximtoppm $ $@ %.ppm : %.xpm xpmtoppm $ $@ %.ppm : %.xvmini xvminitoppm $ $@ %.ppm : %.yuvsplit yuvsplittoppm $ $@ %.ppm : %.yuv yuvtoppm $ $@ - -- Charles Howes -- [EMAIL PROTECTED] Microsoft Magic Line, The: n; the curve on a price-performance chart defined by the set of current shipping MS products. New MS products shift the MML upward. Competitive products that fall below the MML become unmarketable and disappear. Hence, Microsoft is always the worst marketable solution for any real problem.
Re: Circular dependency dropping error
%% Charles Howes [EMAIL PROTECTED] writes: ch Using make version 3.79.1, on Linux 2.2.16 with glibc-2.1.2. ch % ls -la asdf.gif ch asdf.gif ch % make asdf.png ch make: *** No rule to make target `asdf.png'. Stop. This is correct, right? ch % make asdf.ppm ch make: Circular asdf.bmp - asdf.ppm dependency dropped. ch ppmtobmpasdf.bmp ch /bin/sh: -c: line 1: syntax error near unexpected token `' ch /bin/sh: -c: line 1: `ppmtobmpasdf.bmp' ch make: *** [asdf.bmp] Error 2 I agree, this seems wrong. I would expect make, after deciding to throw out that circular dependency, to decide it doesn't know how to build asdf.ppm and give output like this: make: Circular asdf.bmp - asdf.ppm dependency dropped. make: *** No rule to make target `asdf.ppm'. Stop. rather than failing with an incorrect value. I'll look into this. ch % giftopnm asdf.gif | ppmtoxpm asdf.xpm ch % rm asdf.gif ch % make asdf.png ch make: Circular asdf.xpm - asdf.ppm dependency dropped. ch xpmtoppm asdf.xpm asdf.ppm ch pnmtopng asdf.ppm asdf.png ch rm asdf.ppm This is correct, right? ch Anyway, yes, perhaps I'm stretching 'make' too far, but I'm strongly ch encouraged by the fact that this works some of the time! As far as I can tell, make works all the time when it should work. What is broken is that in some situations where make can't do what you want, it will try to do something bogus instead of just printing an error. Am I correct here, or am I missing something? -- --- Paul D. Smith [EMAIL PROTECTED] Find some GNU make tips at: http://www.gnu.org http://www.paulandlesley.org/gmake/ "Please remain calm...I may be mad, but I am a professional." --Mad Scientist
Re: Circular dependency dropping error
%% Regarding Re: Circular dependency dropping error; you wrote: ch % ls -la asdf.gif ch asdf.gif ch % make asdf.png ch make: *** No rule to make target `asdf.png'. Stop. This is correct, right? ch No, there is a rule for %.png - %.ppm, and a rule for %.ppm - ch %.gif. %.png - %.gif should have worked. This does work for ch %.png - %.xpm, as seen later, and the rules are identical. Not in the makefile you sent in your message. There's a target %.gif that can be built from %.ppm, but there's no implicit rule that shows how to build anything (including %.ppm) from %.gif. Either you overlooked it, or the makefile I received got truncated somehow. ch Anyway, yes, perhaps I'm stretching 'make' too far, but I'm strongly ch encouraged by the fact that this works some of the time! As far as I can tell, make works all the time when it should work. What is broken is that in some situations where make can't do what you want, it will try to do something bogus instead of just printing an error. Am I correct here, or am I missing something? ch It's actually doing the right thing about half the time. I guess the ch code determining which dependency to drop is picking an arbitrary ch dependency, instead of useless dependencies. It's not clear how make would determine "useless". What I would assume is that make would pick the last dependency that caused the loop, and throw it out. -- --- Paul D. Smith [EMAIL PROTECTED] Find some GNU make tips at: http://www.gnu.org http://www.paulandlesley.org/gmake/ "Please remain calm...I may be mad, but I am a professional." --Mad Scientist
