CFront compilation problems

I had exactly the same problem. And I like to use c++ so I was happy to find this post but pity finding not solution here, so I work out a solution as follows.

After coping the content of sample.c to sample.cpp and libload.c to libload.cpp and compilation of sample.cpp with Visual Studio .NET 2003 you get the following error:

C1083 Include_file can’t be loaded ‘cf/ch.h’
Solution: change

#include <cf/cf.h>

To

Extern "C" {
#include "cf.h"
}

The same applies to lipload.cpp.

Neosky wrote:

Added:If you don't do so you will get in the end a Linker error: 92 unsolved reference.

Next error C1004 says that the file ends unexpected just delete the last symbol in the cf.h

c.kestas wrote:

error C2664: 'stricmp' : cannot convert parameter 1 from 'DBL_U8 *' to 'const char *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

After a little search [1] [2] [3] I found that it is a convert problem.

typedef unsigned char DBL_U8;		
DBL_U8     *NDBCDriverName = (DBL_U8*)"ndbcn";

unsigned char *NDBCDriverName;

The Code above shows that NDBCDriverName is a pointer to ‘unsigned char’ but ‘stricmp’ is requires a pointer to 'const char', the almost the same applies to lines below here ‘SessionInit’ is waiting for a pointer to unsigned char. The Solution is a typecast:

//<<<Changed by Neosky>>>---[(const char*)]---{to convert unsigned char* to const char*}
  //<<<Changed by Neosky>>>---[(unsigned char*)]---{to convert const char* to unsigned char*}
  if (!stricmp((const char*)NDBCDriverName, "NDBCN"))
    SessionInit((unsigned char*)"cfront.dll");
  else if (!stricmp((const char*)NDBCDriverName, "NDBCS"))
    SessionInit((unsigned char*)"cfrontsql.dll");

The next error C2440 ‘=’:’void*’ can’t be converted to ‘’comes after compiling libload.cpp

hGlobalSession = malloc(sizeof(DLL));

This means the function malloc gives out a void value witch need to be converted by typecast to HDLLSESSION, HDLLSESSION is a static struct DLL* as shown:

_CRTIMP void * __cdecl malloc(size_t);

typedef struct DLL
{
  char               DLLName[20];
  DBL_S16            DLLLoaded;
  DBL_DLLHandleType* DLLHandle;
} DLL;
typedef struct DLL* HDLLSESSION;
static HDLLSESSION hGlobalSession = NULL;

So the solution is as follows:

//<<<Changed by ber_lst>>>---[(struct DLL*)]---{to convert void* to struct DLL* }
  hGlobalSession = (struct DLL*)malloc(sizeof(DLL));

The last error C2664 says ‘strcpy’ converting of parameter 2 from ‘DBL_U8*’ to ‘const char*’ is not possible.

strcpy(hGlobalSession->DLLName, DLLName);

DLLName is a DBL_U8 type and as such it is unsigned char, so that means a pointer to unsigned char can’t be converted to a pointer to const char.

char *  __cdecl strcpy(char *, const char *);

void SessionInit(DBL_U8* DLLName)
{
  //<<<Changed by ber_lst>>>---[(struct DLL*)]---{to convert void* to struct DLL* }
  hGlobalSession = (struct DLL*)malloc(sizeof(DLL));
  strcpy(hGlobalSession->DLLName, DLLName);
  hGlobalSession-&gt;DLLLoaded = 0;
  DBL_Init&#40;&#41;;
&#125;

The Solution:

//<<<Changed by ber_lst>>>---[(const char*)]---{to convert unsigned char* to struct const char*}
  strcpy(hGlobalSession->DLLName, (const char*)DLLName);

Finally copy all needed files as descript in readme.txt of c/front sample to the debug folder, compil the sample.exe and have fun. =D>