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Add comments to the code warning that _XOPEN_SOURCE might need to be

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defined manually if using USE_PREAD or USE_PREAD64. (CVS 4509)

FossilOrigin-Name: d7ed7cd077fe5f9ffba2bca48b84b231ccfd85b0
This commit is contained in:
drh
2007-10-23 15:59:18 +00:00
parent 71674ce9ce
commit 9e0ebbfa41
4 changed files with 17 additions and 9 deletions
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4
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.616 2007/10/23 15:51:27 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.617 2007/10/23 15:59:18 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -112,6 +112,8 @@
** implemented on some systems. So we avoid defining it at all
** if it is already defined or if it is unneeded because we are
** not doing a threadsafe build. Ticket #2681.
**
** See also ticket #2741.
*/
#if !defined(_XOPEN_SOURCE) && !defined(__MACOS__) && SQLITE_THREADSAFE
# define _XOPEN_SOURCE 500 /* Needed to enable pthread recursive mutexes */