On Friday, 8 April 2022 14:26:21 EDT Danny Miller wrote: > I used "sudo apt-get install" and libmodbus5 was already there. > > halcompile --install x200_vfd.comp does: > > gcc -I/usr/include -I/usr/include/linuxcnc -URTAPI -U__MODULE__ -DULPAI > -Os -o x200_vfd /tmp/tmp4bdQIY/x200_vfd.c -Wl,-rpath,/lib -L/lib > -llinxcnchal > > Then, no error about missing typedef (and function prototypes)- which > would have been a lack of a header file. It's got the header file, now > "undefined reference" for the functions. So the header prototyped the > function now, but it's not seeing the actual compiled code > "modbus_write_registers" etc > > Danny >
So I'm lost. Sorry for the noise. > On 4/8/2022 12:25 PM, gene heskett wrote: > > On Friday, 8 April 2022 13:06:57 EDT Danny Miller wrote: > >> So, I think libmodbus-dev is correct, the typedef and function > >> names > >> match. > >> > >> I installed it, now the file in /usr/include/modbus/modbus.h should > >> work, and it looks like halcompile definitely uses it when given an > >> explicit path, since the error message changes. > >> > >> That directory just has the header file, it looks like the error is > >> that it can't actually find the compiled definitions of the > >> functions > >> called out in the header. > >> > >> Danny > > > > That sounds like you do not have libmodbus5 installed. And that > > puzzles me a bit because libmodbus-dev should have pulled it in as a > > dependency. > > > > What utility are you useing to install this stuff? > > > >> On 4/7/2022 9:01 PM, Danny Miller wrote: > >>> Thanks Andy! Closer... it's in /usr/include/modbus/ > >>> > >>> I specified that. Now it doesn't fail on a missing type modbus_t, > >>> but > >>> rather "undefined reference" to any modbus_write_bit etc functions. > >>> So even though I did get that install for libmodbus to work, it > >>> just > >>> has the header file. It's not able to find the definitions in a > >>> compiled file. > >>> > >>> More ideas? > >>> > >>> Danny > >>> > >>> On 4/7/2022 5:23 AM, andy pugh wrote: > >>>> On Thu, 7 Apr 2022 at 03:27, Danny Miller <dan...@austin.rr.com> > > > > wrote: > >>>>> And same prob. It's looking for stuff in the libmodbus's > >>>>> modbus.h > >>>>> but > >>>>> it's not seeing it somehow. > >>>> > >>>> You could try giving it a complete path: > >>>> > >>>> #include "/usr/share/modbus/modbus.h" > >>>> > >>>> (quotes rather than braces, I think, for an explicit path) > >>>> > >>>> Or, maybe > >>>> > >>>> #include <modbus/modbus.h> > >>>> > >>>> As libmodbus installs into a directory. > >>> > >>> _______________________________________________ > >>> Emc-users mailing list > >>> Emc-users@lists.sourceforge.net > >>> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > Cheers, Gene Heskett. > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
