[fpc-pascal] trying to use C code in .pas on WIN32

conlin664 conlin664 at yahoo.com
Wed Jan 23 22:30:38 CET 2019

I've done research, but am just missing something.
my .pas code links just fine, but doesn't RUN.
( first writeln never appears )
If I remove the  external call to C code, then the writeln works as normal.


I have c code, which I'm compiling on a WIN32 machine ( yes the horror )
using  GCC 4.5.2  target mingw32

It generates .o files which i grouped together with ar  into common.a
I then renamed common.a to be libcommon.a

Then I have a 

Common.pas file:

unit Common;

sysutils, dos, CTypes;

{$linklib libcommon.a }

procedure CutilInit;  cdecl; external 'CutilInit';



the a CommonTest.pp file:

Program commonTest;

  writeln('got here');

fpc.exe -TWin32 -Mdelphi -vw -Sg  -Ci -O1 -Cp386 -XS -gl -p- -b-

is the relevant way I'm invoking fpc

It links, but then does nothing on execution.

If I change the C line to be:

 procedure CutilInit;  cdecl; external;

I think get a link error
Undefined Symbol: _CutilInit

Any ideas ?

Does the linklib define need to be below where I declare the C routines ?
Is it something to do with WINDOWS.. ( aka the _ in the name )

Maybe I need different options on the C compile..

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