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Subject:	Re: compilation of sqlite3 on dos using djgpp
From:	"HILMAN AHWAS A. (hilmanahwaa AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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On Saturday, February 25, 2023 at 1:43:44 AM UTC+7, Frank Sapone (emo DOT  DOT  DOT  AT gmail DOT com) [via djgpp AT delorie DOT com] wrote:
> On 2/22/2023 9:57 AM, HILMAN AHWAS A. (hilma DOT  DOT  DOT  AT gmail DOT com) [via
> dj DOT  DOT  DOT  AT delorie DOT com] wrote: 
> > On Monday, February 18, 2013 at 2:02:33 AM UTC+7, <@email omitted> wrote: 
> >> 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 
> > Where do I place those lines of code?
> According to Georg's instructions sqlite3.c from the source code. 
> 
> Frank

In what line numbers? I've obtained the 3.42.0 amalgamation source code

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