undefined reference to....

Discussion in 'C' started by crapodino, Jan 14, 2008.

  1. crapodino

    crapodino New Member

    Jan 12, 2008
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    Hi! i am trying to compile/link a simple application that uses a library called OpenDBX. I have already compiled and installed that library. Now, i am trying to do a simple client of it.

    The client (Prueba.c) is just like this:
    #include <stdio.h>
    #include <stdlib.h>
    #include <stdint.h>
    #include <odbx.h>
    int main(void) {
    	puts("Hello World!!");
    		int err;
    		odbx_t* handle;
    		if( ( err = odbx_init( &handle, "mysql", "", "" ) ) < 0 )
    		    fprintf( stderr, "odbx_init(): %s\n", odbx_error( handle, err ) );
    		    return err;
    		return EXIT_SUCCESS;

    When i try to compile that program (Prueba.c), i has this error:

    cc -c -o Prueba.o Prueba.c
    gcc -O2 -g -Wall -fmessage-length=0 -L/usr/local/lib -L/usr/local/lib/opendbx -L/usr/local/lib/pkgconfig -o Pruebas Prueba.o
    Prueba.o: In function `main':
    Prueba.c:(.text+0x3c): undefined reference to `odbx_init'
    Prueba.c:(.text+0x57): undefined reference to `odbx_error'
    collect2: ld returned 1 exit status
    make: *** [Pruebas] Error 1

    Those functions (odbx_error and odbx_init are both defined in odbx.h (the header of openDBX y need to include).

    I have checked that openDBX libraries are okey. There are in /usr/local/lib , /usr/local/lib/opendbx and /usr/local/lib/pkgconfig.

    My makefile is like this:

    COMPILER = gcc
    CCFLAGS =	-O2 -g -Wall -fmessage-length=0 
    OBJS =		Prueba.o
    LIBS = 
    TARGET =	Pruebas
    LDFLAGS = -L/usr/local/lib -L/usr/local/lib/opendbx -L/usr/local/lib/pkgconfig
    $(TARGET):	$(OBJS)
    all:	$(TARGET)
    	rm -f $(OBJS) $(TARGET)
    So...can someone please tell what does this error mean ? i think that it doesn't found the library asosiated with de odbx.h, but i am not sure.

    Very thanks


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