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Subject: Re: compilation of sqlite3 on dos using djgpp
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Well, on a lazy Sunday afternoon I tried to compile SQLite too.

The following steps allowed to compile it:

1. run "configure --disable-threadsafe"

2. modify this in sqlite3.c:

#ifdef __DJGPP__
  { "fstat",        0,                 0  },
//#define osFstat(a,b,c)    0
#define osFstat(a,b)    0 //djgpp - replacing above
#define MAP_SHARED 0
#define MAP_FAILED 0
#define ETIMEDOUT 9000 //unused number
#define ENOTCONN  9001 //unused number

#else      

3. take out munmap:

    for(i=0; i<p->nRegion; i++){
      if( p->h>=0 ){
        //djgpp munmap(p->apRegion[i], p->szRegion);
      }else{
        sqlite3_free(p->apRegion[i]);
      }
    }

4. take out mmap:

      if( pShmNode->h>=0 ){
/* djgpp
        pMem = mmap(0, szRegion,
            pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
            MAP_SHARED, pShmNode->h, szRegion*(i64)pShmNode->nRegion
        );
*/
        if( pMem==MAP_FAILED ){
          rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename);
          goto shmpage_out;
        }


Then it did compile and seemed to work so far. The library does not use mmap, only the shell program sqlite3.exe does and I guess that will work so far without mmap in DOS.

Georg