It appears there is a bad check when setting up the
pread (and pwrite) callback:
#if defined(USE_PREAD) || defined(SQLITE_ENABLE_LOCKING_STYLE)
{ "pread", (sqlite3_syscall_ptr)pread, 0 },
#else
{ "pread", (sqlite3_syscall_ptr)0, 0 },
#endif
SQLite forces SQLITE_ENABLE_LOCKING_STYLE to _always_ be defined:
#if !defined(SQLITE_ENABLE_LOCKING_STYLE)
# if defined(__APPLE__)
# define SQLITE_ENABLE_LOCKING_STYLE 1
# else
# define SQLITE_ENABLE_LOCKING_STYLE 0
# endif
#endif
So locking style is defined as '0', so I'm thinking the check
_should_ have been:
#if defined(USE_PREAD) || SQLITE_ENABLE_LOCKING_STYLE
There are 2 other instances of checks for
defined(SQLITE_ENABLE_LOCKING_STYLE)
that should also be changed in the code.
If you want, I can provide a patch against trunk to fix the build
issue. I've currently, though, only modified the amalgamation 3.7.6.1
build in my local repo.
Thanks.
-Brad
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