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Undefined Reference To Error In Linux

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Object files have symbols in them for linking and contain the 'global' symbols that are needed for the linking process. Not the answer you're looking for? But when I try to compile the file that I really want to use "vclient.c" I get an error message /tmp/ccuuPxtN.o(.text+0x3bc): In function `main': vclient.c: undefined reference to `initLog' Now as Also, I don't know C++, so the your source code where you reference them may be different than you have coded, although I doubt it. check over here

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Undefined Reference To C

test.c needs libcrypto, so it must come before -lcrypto. Or if I could do this step manually without modifying the makefile, I'm not sure how to do it. –relo Jul 17 '15 at 23:51 You will have to Why does Wikipedia list an improper pronunciation of Esperanto? Browse other questions tagged c function reference undefined or ask your own question.

asked 1 year ago viewed 11308 times active 1 year ago Linked 14 What does the “undefined reference to varName” in C mean? 0 Building my own library with unitests complains You are forward declaring the class but not defining it which doesn't really make sense. You must supply all needed .o files (or .c) as arguments to the compiler. Undefined Reference To Function C++ To perform the linkage, if you are using an IDE you can normally simply add the library to your project, if using the command line, once again please see my series

Ask Ubuntu works best with JavaScript enabled Skip to content Ignore Learn more Please note that GitHub no longer supports old versions of Firefox. Gcc Linker Error Undefined Reference Join Date Dec 2012 Posts 3 Originally Posted by jkwilborn Tina, I will try and give you a quick explanation. Solutions? this website Try compiling it as gcc Main.c Person.c -o MyProgram.

May 2 '15 at 6:05 This question has been asked before and already has an answer. Undefined Reference To Linker Error In case you don't know 1
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namespace lucene { namespace analysis { namespace standard{ class StandardAnalyzer; } } } is the forward declaration. Use $(pkg-config --libs --cflags libnanomsg) for gcc to link your program. - Libs: -L${libdir} -lnanomsg + Libs: -L${libdir} -lnanomsg @[email protected] - Cflags: -I${includedir} + Cflags: -I${includedir} @[email protected] Not sure if that's Home Forum Today's Posts | FAQ | Calendar | Community Groups | Forum Actions Mark Forums Read | Quick Links View Site Leaders | Unanswered Posts | Forum Rules Articles Marketplace

Gcc Linker Error Undefined Reference

share|improve this answer edited Apr 5 '11 at 22:59 answered Apr 5 '11 at 22:20 Jerry Coffin 322k31354750 This works, but is this generally how larger C programs are Adv Reply February 14th, 2011 #2 Arndt View Profile View Forum Posts Private Message Ubuntu Cappuccino Scuro Join Date May 2006 Beans 1,787 Re: compiling with gcc and "undefined reference Undefined Reference To C So, you probably have it defined somewhere that it's used by other code sequences (in other C source) and 'it' assumes it will be resolved during linking. Undefined Reference To Gcc Reload to refresh your session.

If it's in a header file, and that file is included in ALL references, then you should not have this failure. check my blog No Library To understand this issue, remember that a header file (.h) is not a library. Also note that 1) there are lots of variations in how to use make when it comes to large projects, and 2) there are also lots of alternatives to make. The compiler needs a class definition. Undefined Reference To Function

  • As I read this the previous person is correct, you code compiled OK, but when it came to linking the final executable it ended with undefined symbols, these are caused by:
  • Why does Deep Space Nine spin?
  • For some reason it is not being linked.
  • it worked!!!
  • Hilbert-irreducible Banach space Split python tuple in subtuples with capacity limit in functional programming style Who was Mikael Blomkvist with at the end of the movie and why did Lisbeth hate
  • I added the -lm to various parts of the makefile that seemed appropriate, but it didn't help.
  • The linker neither knows nor cares about header files – it cares about .a and .lib files.
  • Hello I have created a derived class, crectangle, but I can not compile a program?

You normally specify what needs to be done via a makefile, and use make to do the work. Thank you! more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation http://centralpedia.com/undefined-reference/undefined-reference-error-in-linux.html Check out this tutorial on makefiles: Make File Tutorial It helps to automate this process.

As I wrote, I really would appreciate any help. Undefined Reference C++ Wrong Project Type The linker error regarding WinMain above can occur in a number of situations, particularly when you are using a C++ IDE such as CodeBlocks or Visual Studio. These Aren't Roasted!

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sustrik closed this Jun 19, 2014 Sign up for free to join this conversation on GitHub. Results 1 to 4 of 4 Thread: compiling with gcc and "undefined reference to xxx" Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode It's designed to be run to test the library so it doesn't matter as long as it works after it has been built. –Matthew Mitchell Sep 5 '12 at 0:13 Undefined Reference To G++ I have installed gcc on a NSLU2.

Solutions? Since you compiled multiple sources, even though on the same line, symbols that are not defined as global or extern or whatever you compiler needs, the symbols are lost. Is there a word for "timeless" that doesn't imply the passage of time? http://centralpedia.com/undefined-reference/undefined-reference-to-ns2-error.html more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

If this is your first visit, be sure to check out the FAQ by clicking the link above. You can see that -lcfitsio -lm comes from line 301 in the makefile, how can I set it so that it comes at the end of the gcc commands? As for libtool, the libnanomsg.la is fine, but the problem seem to be that libnanomsg.pc.in does not reuse the libraries found in configure.ac. vseryakov commented Jun 17, 2014 On Linux AMI compiling static lib libnanomsg.pc does not have -lanl but detects in and use getaddrinfo_a. .la file contains -lanl.

But it’s not magic – like all errors it means that you have done something wrong, in you code and/or your project’s configuration, and you need to take some time to