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Undefined Reference Error While Linking


As such, this information has to be encoded in the function's symbolic name. The library in question is my fork of libosm which uses protobuf to generate de-/serialization code for OpenStreetMap data in its binary format (.osm.pbf). If a program fails at runtime with a linking error, it is due to the runtime linker not being able to find one or more of the .so files needed to However, I am still getting the problem. check over here

In your main.cpp, you probably have something like this: #include where header.h refers to your c library. sample code: cursor.c1
#include "dsybase.h" #include "sqlbind.h" DBCURSOR *DB_cursor_open(DBPROCESS *open_dbproc, char *select_stmt, DBINT *status, DBINT fetch_buf_size) { DBCURSOR *cursor; ..... .... Join them; it only takes a minute: Sign up Simple C++ undefined reference error during linking while using a class up vote -2 down vote favorite I've got a simple problem Not the answer you're looking for? http://stackoverflow.com/questions/28683254/undefined-reference-while-linking-static-c-library

Gcc Undefined Reference To Function

All rights reserved. And can't seem to find out what the problem is. share|improve this answer answered Aug 4 at 8:01 Smeeheey 6,066526 Just to clarify on this, if I have a function fn1( string st1) , which is defined in a

  1. quaere et invenies. "Simplicity does not precede complexity, but follows it." -- Alan Perlis "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra "The only real
  2. So a library compiled with one compiler may not work with another.
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  4. My directory structure is: bin\client include\SocketApp.h lib\libSocketFunctions.a src\ClientApp.cpp I have recompiled the library and again placed it in the lib directory.
  5. EDIT (a more in depth excerpt of code, I've tried to simplify otherwise this will be impossible to read, but let me know if I still need to add stuff, I'll
  6. What object can prove the equations?

Ubuntu user number # 24044 Projects : TimeWarp - on the fly Backups Adv Reply June 12th, 2012 #10 hasanalikhattak View Profile View Forum Posts Private Message 5 Cups of Password Register FAQ Members List Calendar Today's Posts Search Search Forums Advanced Search Go to Page... How to make Skyscanner, Kiwi, Kayak include ground transfer in the search What was that alien in Doctor Who that nobody saw? Gcc Undefined Reference To Std Cout Code: $ nm executable That's just the first method that came to mind.

Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Undefined Reference To `sha256_update' current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Thread Tools Search this Thread Rate Thread #1 18-Dec-2008, 23:07 gcctest New Member Join Date: Dec 2008 Posts: 1 Undefined reference error while linking Dear all , I http://stackoverflow.com/questions/38761620/undefined-reference-to-error-while-linking-object-files If you create a function called func, the symbol will be called "func", or perhaps "_func" on some systems.

asked 1 year ago viewed 601 times active 1 year ago Related 10What are the pro and cons of statically linking a library?1linkning linux static libraries in windows with cygwin19Proper way Undefined Reference C++ Do you mean that the functions prototypes are in the header file or what? The library has to be linked to be used. (Sorry if you already knew all this.) As I understand it, you have two linking stages: 1) where you link abc.o into isn't that similar to what i said ?

Undefined Reference To `sha256_update'

Bottom line: Make sure you can go through it with something you know should work. http://askubuntu.com/questions/194193/why-do-i-get-undefined-reference-errors-when-linking-against-openssl How to create a torus with divided cuts that correspond to the direction of the torus Why do we need blockchains? Gcc Undefined Reference To Function And don't ignore warnings as you compile your code; warnings usually indicate a lurking problem that can lead to real problems later. G++ Undefined Reference To up vote 4 down vote favorite 1 My compilation process throws around errors like ..undefined reference to `BN_cmp' although I include and run gcc -lssl -lcrypto test.c -o test can

Thanks in advance for the help. check my blog valgrind can save you days worth of debugging effort by quickly pointing you to the source and type of these memory access bugs in your program code. Header files contain declarations and function prototypes, which tell you about the source code. Topic archived. .so Undefined Reference To

Source files are compiled into object files, which are linked into libraries or programs. The "closest" you come to that is the local variable S1 inside main(), but of course, that's an entirely different things. file1.h: #ifndef FILE1_H #define FILE1_H class Simple { private: unsigned int length = 10; public: void SetLength(unsigned int l) {length = l;} unsigned int GetLength() {return length;} }; extern Simple S1; http://centralpedia.com/undefined-reference/undefined-reference-to-linking-error.html No new replies allowed.

I then understood that one should not try to compile both .c and .cpp files with one compiler, instead to use gcc for one, g++ for the other, and thereafter to Cannot Find C++ functions, on the other hand, are a little different. How to fix a bent lens mount hook?

but i think the problem is that in first application i am including header files of libxml2 in my code and then make a shared object library of it.

gcc(1) Code: -I dir Add the directory dir to the list of directories to be searched for header files. However, I did 2 tests. Dec 8, 2010 at 2:22pm UTC kooth (736) You're getting this error because your makefile probably doesn't include a reference to the library where dbcursoropen() is defined, or the library is Openssl Search Engine Optimisation provided by DragonByte SEO v2.0.32 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

Hot Network Questions Why is C# Dim a Chord in B Minor? For example, my Linux distributions all have shared versions of the math library file: /usr/lib/libm.so is a symbolic link to a shared math library file. Adv Reply June 12th, 2012 #2 trent.josephsen View Profile View Forum Posts Private Message Visit Homepage Tall Cafè Ubuntu Join Date Feb 2009 Beans 1,467 Re: undefined reference to 'function' http://centralpedia.com/undefined-reference/undefined-reference-to-error-while-linking.html Anyhow, I suggest you try the following.

They are unrelated. –R Sahu Feb 24 '15 at 15:37 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted The problem is the linker (gcc), yes i guess. The library itself compiles fine and contains the function in question. Many thanks for anymore suggestions, Steve 03-05-2008 #4 dwks View Profile View Forum Posts Visit Homepage Frequently Quite Prolix Join Date Apr 2005 Location Canada Posts 8,055 An "external function" is