Linking static library to .cpp file

[animesh644]

I have a libcx3d.a which contains my VrmlParser class and other classes which are used by VrmlParser. I have a main.cpp which does this :

VrmlParser vp = new VrmlParser();
double **VOB = vp.getVOB();

When I compile using g++ main.cpp -o main -L. -lcx3d, I get the following errors :

'VrmlParser' was not declared in this scope.
expected ';' before vp.
'vp' was not declared in this scope.

There is a header file called "VrmlParser.h" in the static library. Should I include this header file in main.cpp ? If so, will include "VrmlParser.h" work ? I have the .a and .cpp in the same directory. I can't find the header file for the static library.

What should I do ?

[Daleth]

Did you add the library's path name to the linker options?

[animesh644]

I have a directory called Temp which contains the libcx3d.a and main.cpp files. Please tell how should I compile. Sorry for being a noob.

[JLBorges]

> When I compile using g++ main.cpp -o main -L. -lcx3d, I get the following errors :
> 'VrmlParser' was not declared in this scope. ....

Include the header for the library. For instance, if it is vrmlparser.h
#include "vrmlparser.h"

[animesh644]

I added the following things in main.cpp :

include <path_to_VrmlParser.h>
using namespace CyberX3D; // this is used by the static library

Then I did g++ -c main.cpp -I/path_to_header_files

main.o gets created. Then I do g++ -o main main.o -L. -lcx3d and errors come up. The errors are :

main.cpp:(.text+0x18): undefined reference to `CyberX3D::VrmlParser::VrmlParser()'

main.cpp:(.text+0x20): undefined reference to `CyberX3D::VrmlParser::getVOB()'

What is going wrong ?

[JLBorges]

Assuming that libcx3d.a is in the same directory as main.o

> g++ -o main main.o libcx3d.a

[animesh644]

I ran the above command and the following got printed :

main.o: In function `main':
main.cpp:(.text+0x18): undefined reference to `CyberX3D::VrmlParser::VrmlParser()'
main.cpp:(.text+0x20): undefined reference to `CyberX3D::VrmlParser::getVOB()'
collect2: ld returned 1 exit status

[Daleth]

animesh644 wrote:

I have the .a and .cpp in the same directory.

JLBorges wrote:

Assuming that libcx3d.a is in the same directory as main.o

[JLBorges]

What does > nm -C -g libcx3d.a print out?

[animesh644]

I solved the problem.

Initially, I built the static library through cygwin and transferred the libcx3d.a to the remote server on which I plan to run my application. When I built the library again on the server and then linked to it, it worked.

Thanks for your replies. :)