Date: Tue, 10 Mar 1998 10:22:42 -0800 (PST) From: Burton Sampley <bsampley@best.com> To: Dave Bodenstab <imdave@mcs.net> Cc: questions@FreeBSD.ORG Subject: Re: GCC + object oriented prgm & FBSD Message-ID: <Pine.BSF.3.96.980310101318.5962B-100000@bsampley.vip.best.com> In-Reply-To: <199803101557.JAA06721@base486.home.org>
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-----BEGIN PGP SIGNED MESSAGE----- Thanks for the info. Last night I received help from Tom Dean (thanks Tom). That was the problem preventing it from compiling. There were other logic errors, which I have since solved and the program is behaving the way I intended it to. I did read the man page for GCC, but it was not clear in their documentation that I needed to separately compile each file with the -c switch and then link them in a separate step. I have now discovered why every single port comes with a makefile. Make should be everybody's best friend because once you setup a simple makefile everything can be handled in a single short commandline statement. I also looked at info for GCC. The information appeared to be the same as the man page. Anyway, it's time to move on to my next assignment. Thanks again for the help. - -burton- - --------------- Burton Sampley bsampley@best.com or bsampley@haywire.csuhayward.edu PGP key available at http://www.best.com/~bsampley/pgp.html On Tue, 10 Mar 1998, Dave Bodenstab wrote: > Date: Tue, 10 Mar 1998 09:57:17 -0600 (CST) > From: Dave Bodenstab <imdave@mcs.net> > To: bsampley@best.com > Cc: questions@FreeBSD.ORG > Subject: Re: GCC + object oriented prgm & FBSD > > > From: Burton Sampley <bsampley@best.com> > > > > I need some help trying to compile my first object-oriented program using > > multiple files in C++ on FreeBSD. What syntax would make g++ happy? > > GCC/G++ keep puking when I try to compile the "main" program with all of > > the function calls to functions defined for the class as undefined > > symbols. Here's the output from my most recent attempt with my code: > > > > bsampley(123)% g++ strcomp.C > > /var/tmp/cc0017691.o: Undefined symbol `_get_data__11comparetypePc' > > referenced from text segment > > /var/tmp/cc0017691.o: Undefined symbol `_compare__11comparetype' > > referenced from text segment > > /var/tmp/cc0017691.o: Undefined symbol `_output__11comparetypePc' > > referenced from text segment > > bsampley(124)% > > It looks like you're missing the ``-c'' argument on the g++ command line. > Read the man page for ``cc'', and try: > > g++ -c file1.C > g++ -c file2.C > g++ -c file3.C > g++ -o my-first-prog file1.o file2.o file3.o > ./my-first-prog > > Without the ``-c'' option, you are telling g++ to compile *and link*. > What you probably want to do is compile each source file separately. > You do this using ``g++ -c ...''. This creates an *object* file > for each source file. When you've got each source file compiled > and have the corresponding object file, you then link the object > files together and create the final executable program file. > > > What I have tried: > > > > 1. Quickly searched through /usr/src/ looking for a good example of a C++ > > program split into severals files. I couldn't locate one. > > > > 2. RTFM'ed the man pages for GCC/G++. I'll try this again, it has to be > > in there somewhere. > > It's in here, but you may not be familiar with the terminology. > > > 3. Typed my professor's example program (all three files) kept getting > > the same error I get with my code. > > > > 4. Tried the list. > > > > Thanks in advance for any help. > > Dave Bodenstab > imdave@mcs.net > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNQWE+Xt2O8KJtMdBAQGkSAP+NPi/ocE6rmjnpfFNtVXPwIDKya6s8tE9 zdGeOrF3MeA3wYIVsJJA89ri8rpHaewS5kLEe+uURRnPPYY9SHVXkQuD0jXkB7bg KqoQFYGoUsP8XbTO79TlsLoYsHhxstO4HiMUJMaqZk6hGRJv67N10JVSFDO6zwiA x9teR+WClFU= =KDjt -----END PGP SIGNATURE----- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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