Link Error

p3aul

I create a program in Delphi and got it to work fine. I ported it over to C++ Builder and after the usual quirks and glitches, I got it past the compiler with no errors, but then I got this link error:

[ILINK32 Error] Fatal: Unable to open file ''
No hint as to which file failed to open!
Here are the includes:

[code][color=Red]#include
#pragma hdrstop

#include "Unit1.h"
#include
#include [/color][/code]
Any help will surely be appreciated!
Paul

Lundin

Why are you including vcl.h twice?

Also, C++ standard requires the syntax

#include
using namespace std;

p3aul

: Why are you including vcl.h twice?
:
: Also, C++ standard requires the syntax
:
: #include
: using namespace std;
I didn't see that. I'm using Codegear RAD Studio and it put in in by default. I didn't know about the using namespace std.

p3aul

Well I still don't what the problem is. I put the same code in an old copy of C++ Builder 3 that I had and it works just fine!

: Why are you including vcl.h twice?
:
: Also, C++ standard requires the syntax
:
: #include
: using namespace std;

luckyboy

I know it is a very bad idea
could you uninstall C++Builder, restart windows, reinstall it.
you have to do that only if you can't compile your program right after widows restart

also, i always use math.h, it works fine, i believe it is not the cause;

Lundin

With the information provided, it is impossible to tell, really. Double includes of vcl.h seem fishy, if Borland didn't include header guards in that h-file, you would get linker errors. But I doubt they do such newbie errors in their library files.

math.h is not the cause, I just pointed out that it was incorrect C++ syntax. It works just because Borland added non-standard compiler extensions. Borland in particular are infamous for their historically poor support for standard C++ #include syntax, you had to use the old .h syntax til they finally fixed it somewhere around Builder vers 3 and 4. They still support the non-standard syntax though.

luckyboy

: math.h is not the cause, I just pointed out that it was incorrect
: C++ syntax. It works just because Borland added non-standard
: compiler extensions. Borland in particular are infamous for their
: historically poor support for standard C++ #include syntax, you had
: to use the old .h syntax til they finally fixed it somewhere around
: Builder vers 3 and 4. They still support the non-standard syntax
: though.

i didn't get the point, since the first version i worked with was CBuilder 6.0 and the free one Borland 5.0 that supports OWL programming rather than VCL, and both of them supports C++ standard syntax as i think.
any way you can include math.h, or cmath ---- iostream.h, or iostream
all works fine, for Microsoft VC++ you can include conio.h but for borland you can include both conio.h, and conio
i don't know the difference, but i think Borland introduced many files without .h to accommodate any style

thanx for clarification about versions 3 and 4
and i think including vcl.h twice is just a print mistake
and yes Borland supports include gaurd headers, :-)