[gdal-dev] compiling GDAL API with gcc

[Norman Vine]

Mattia writes:
>
> I installed GDAL by installing FWTools (I currently have it 
> under /opt) 
> Using Ubuntu 7.10
> For some reason I try to compile :
> 
> #include <stdio.h>
> #include "gdal.h"
> 
> int main() {
> 
>     printf("test\n");
> 
>     GDALAllRegister();
> 
> }
> 
> 
> but get:
> 
> /tmp/cc4QzAsI.o: In function `main':
> helloworld.c:(.text+0x1e): undefined reference to `GDALAllRegister'
> collect2: ld returned 1 exit status

This is a linker error not a compiler error

You need to link with libgdal


> the compile command I use is: 
> 
> gcc -I/opt/FWTools/FWTools2.4.0/include/ helloworld.c

try something like 

gcc -I/opt/FWTools/FWTools2.4.0/include/ -L/opt/FWTools/FWTools2.4.0/lib
-lgdal helloworld.c

HTH

Norman