etc.c.zlib help

[Laeeth Isharc via Digitalmars-d-learn]

On Thursday, 2 July 2015 at 03:07:43 UTC, Matthew Gamble wrote:
> I am trying to make the transition from C++ to D. I've hit a 
> snag with the etc.c.zlib module where any attempt to use this 
> module to open a file yields an error:
> Error 42: Symbol Undefined __lseeki64.
>
> Here is a simple example of code that gives the error upon 
> compilation.
>
> import std.stdio;
> import etc.c.zlib;
>
> void main(string[] args)
> {
> 	char[] fName = "C:\\Users\\Matthew 
> Gamble\\Documents\\sample.bam\0".dup;
> 	char[] mode ="r\0".dup;
> 	gzFile bamFile; //no error here
> 	bamFile = gzopen(&fName[0],&mode[0]); //this is where the 
> error hits
> }
>
> I'm using DMD32 D Compiler v2.067.1 on a windows 8 64 bit 
> machine. Working from either Visual D in Visual Studio 2013 
> Community and Coedit as IDEs gives the error. I'm probably 
> doing something obviously wrong, so have mercy. If etc.c.zlib 
> is not the preferred way to read from a binary gzipped file any 
> advice would be appreciated. Thanks.

Hi.

The etc.c.zlib headers are, I think, just translations of the C 
headers and allow you to link with an external library.  If the 
library is not installed, or the compiler/linker cannot find them 
then you may have a link error.  Are you sure that Visual Studio 
knows where to find the zlib library binary ?  Can you try 
compiling your project with DMD from the command line appending 
-L-lz (that might work on linux, but I don't know on windows)?  
There is a program called everything from void tools that may be 
helpful in finding the library file if its location is not 
obvious.

Laeeth