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Asked: 2026-05-11T14:06:17+00:00

I am using the sqlite3.c library. It compiles with 140 something conversion warnings. What’s

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I am using the sqlite3.c library.
It compiles with 140 something conversion warnings.
What’s wrong with my set-up?

Thanks. 

sqlite3.c c:\Projects\Lib\sqlite3.c(11311) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11312) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11313) : warning C4244: '=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11316) : warning C4244: '+=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11430) : warning C4244: '=' : conversion from 'sqlite3_int64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11431) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11434) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11435) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11436) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11437) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11452) : warning C4244: '=' : conversion from 'sqlite3_int64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11454) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11499) : warning C4244: 'initializing' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11505) : warning C4244: '=' : conversion from 'double' to 'time_t', possible loss of data c:\Projects\Lib\sqlite3.c(11547) : warning C4244: 'return' : conversion from 'sqlite3_int64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11607) : warning C4244: '=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11633) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11720) : warning C4244: '+=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11722) : warning C4244: '+=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11724) : warning C4244: '+=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11726) : warning C4244: '+=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11730) : warning C4244: '+=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11736) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11738) : warning C4244: '+=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11742) : warning C4244: '+=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11781) : warning C4244: '=' : conversion from 'double' to 'sqlite3_int64', possible loss of data c:\Projects\Lib\sqlite3.c(11950) : warning C4244: 'function' : conversion from 'u64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11981) : warning C4244: '=' : conversion from 'double' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(11984) : warning C4244: '=' : conversion from 'sqlite3_int64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(12007) : warning C4244: '=' : conversion from 'sqlite3_int64' to 'char', possible loss of data c:\Projects\Lib\sqlite3.c(12607) : warning C4244: 'return' : conversion from 'sqlite3_int64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(16030) : warning C4244: '=' : conversion from 'sqlite3_int64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(17184) : warning C4244: 'initializing' : conversion from 'sqlite_uint64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(17512) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(19310) : warning C4244: '=' : conversion from 'u64' to 'unsigned char', possible loss of data c:\Projects\Lib\sqlite3.c(19313) : warning C4244: '=' : conversion from 'u64' to 'unsigned char', possible loss of data c:\Projects\Lib\sqlite3.c(19320) : warning C4244: '=' : conversion from 'u64' to 'u8', possible loss of data c:\Projects\Lib\sqlite3.c(25669) : warning C4244: 'initializing' : conversion from 'sqlite3_int64' to 'LONG', possible loss of data c:\Projects\Lib\sqlite3.c(25670) : warning C4244: 'initializing' : conversion from 'sqlite3_int64' to 'LONG', possible loss of data c:\Projects\Lib\sqlite3.c(25702) : warning C4244: 'initializing' : conversion from 'sqlite3_int64' to 'LONG', possible loss of data c:\Projects\Lib\sqlite3.c(25703) : warning C4244: 'initializing' : conversion from 'sqlite3_int64' to 'LONG', possible loss of data c:\Projects\Lib\sqlite3.c(25735) : warning C4244: 'initializing' : conversion from 'sqlite3_int64' to 'LONG', possible loss of data c:\Projects\Lib\sqlite3.c(25736) : warning C4244: 'initializing' : conversion from 'sqlite3_int64' to 'LONG', possible loss of data c:\Projects\Lib\sqlite3.c(28785) : warning C4018: '>=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(29505) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(29511) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(29734) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(29747) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(29871) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(29887) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(30081) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(30360) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(30367) : warning C4244: '=' : conversion from 'i64' to 'Pgno', possible loss of data c:\Projects\Lib\sqlite3.c(30370) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(30665) : warning C4018: '<=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(31713) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(31771) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(31978) : warning C4018: '<=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(33807) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(33809) : warning C4244: 'function' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(34527) : warning C4244: '=' : conversion from 'u16' to 'unsigned char', possible loss of data c:\Projects\Lib\sqlite3.c(34623) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(35382) : warning C4244: '=' : conversion from 'u16' to 'unsigned char', possible loss of data c:\Projects\Lib\sqlite3.c(35884) : warning C4018: '<=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(36557) : warning C4018: '<=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(36674) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(36679) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(36880) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(36887) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(37265) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(37267) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(37272) : warning C4244: 'function' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(37273) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(37343) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(37557) : warning C4018: '<=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(37695) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(37891) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(37962) : warning C4244: '+=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(37964) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(38070) : warning C4244: '=' : conversion from 'u16' to 'u8', possible loss of data c:\Projects\Lib\sqlite3.c(38150) : warning C4244: '=' : conversion from 'u16' to 'u8', possible loss of data c:\Projects\Lib\sqlite3.c(39686) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(40231) : warning C4244: '+=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(40541) : warning C4244: '=' : conversion from 'i64' to 'Pgno', possible loss of data c:\Projects\Lib\sqlite3.c(40590) : warning C4244: 'initializing' : conversion from 'sqlite3_int64' to 'Pgno', possible loss of data c:\Projects\Lib\sqlite3.c(40671) : warning C4244: 'initializing' : conversion from 'i64' to 'Pgno', possible loss of data c:\Projects\Lib\sqlite3.c(41144) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(41152) : warning C4244: 'function' : conversion from 'i64' to 'size_t', possible loss of data c:\Projects\Lib\sqlite3.c(41153) : warning C4244: '+=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(41493) : warning C4244: '+=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(41688) : warning C4244: '=' : conversion from 'const i64' to 'double', possible loss of data c:\Projects\Lib\sqlite3.c(41693) : warning C4244: '=' : conversion from 'const i64' to 'double', possible loss of data c:\Projects\Lib\sqlite3.c(42031) : warning C4244: 'return' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(43995) : warning C4244: 'return' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(44011) : warning C4244: '+=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(44118) : warning C4244: '=' : conversion from 'u64' to 'u8', possible loss of data c:\Projects\Lib\sqlite3.c(44132) : warning C4244: '+=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(44287) : warning C4018: '<' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(44382) : warning C4018: '>=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(44444) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(44489) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(44827) : warning C4244: 'return' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(45006) : warning C4244: '=' : conversion from 'double' to 'i64', possible loss of data c:\Projects\Lib\sqlite3.c(45036) : warning C4244: '=' : conversion from 'double' to 'u64', possible loss of data c:\Projects\Lib\sqlite3.c(46720) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(46735) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(47061) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(47071) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(47168) : warning C4244: '=' : conversion from 'i64' to 'double', possible loss of data c:\Projects\Lib\sqlite3.c(47961) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(47982) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(48020) : warning C4018: '>=' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(48038) : warning C4018: '<' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(48055) : warning C4018: '<' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(48235) : warning C4244: '+=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(48258) : warning C4244: 'function' : conversion from 'u64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(48270) : warning C4244: 'function' : conversion from 'u64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(48275) : warning C4244: '=' : conversion from 'u64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(48493) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(48497) : warning C4244: '=' : conversion from 'i64' to 'u8', possible loss of data c:\Projects\Lib\sqlite3.c(48633) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(49420) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(49564) : warning C4244: '=' : conversion from 'i64' to 'u32', possible loss of data c:\Projects\Lib\sqlite3.c(49567) : warning C4018: '>' : signed/unsigned mismatch c:\Projects\Lib\sqlite3.c(50183) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(50189) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(50635) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(50636) : warning C4244: '=' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(62675) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(62711) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(63239) : warning C4244: 'function' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(63512) : warning C4244: 'initializing' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(63513) : warning C4244: 'initializing' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(63514) : warning C4244: 'initializing' : conversion from 'i64' to 'int', possible loss of data c:\Projects\Lib\sqlite3.c(65536) : warning C4049: compiler limit : terminating line number emission         Compiler limit for line number is 65535 c:\Projects\Lib\sqlite3.c(77234) : warning C4244: '=' : conversion from 'u16' to 'unsigned char', possible loss of data
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1 Answer

  1. From the SQLite web site:

    Some people say that we should eliminate all warnings because benign warnings mask real warnings that might arise in future changes. This is true enough. But in reply, the developers observe that all warnings have already been fixed in the compilers used for SQLite development (various versions of GCC). Compiler warnings only arise from compilers that the developers do not have access to.

    http://www.sqlite.org/faq.html#q17

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