Using Mihai's suggestion, I determined the list of options turned on for -O2 that aren't turned on for -O. Trying each of the additional flags one by one showed that only -finline-small-functions causes the bug to appear. Here is sqlite3 compiled with '-g -O2 -fno-inline-small-functions". $ make CFLAGS="-g -O2 -fno-inline-small-functions" clean sqlite3 > /dev/null ; ./sqlite3 foo "select 1.0 / 3.0; " 0.333333333333333 $ Here is sqlite3 compiled with "-g -O -finline-small-functions". $ make CFLAGS="-g -O -finline-small-functions" clean sqlite3 > /dev/null ; ./sqlite3 foo "select 1.0 / 3.0; "
$ Mihai Limbasan wrote: > > You can check exactly which flags gcc turns on by -O2 (or any other flag > combination, for that matter, including the machine-specific -m flag > family) by following this procedure: > > 1. Create an empty source file: > > touch dummy.c > > 2. Run it though the compiler pass, adding -Q -v to the command line: > > gcc -c -Q -v dummy.c > > > Another option is checking gcc's specs file, but I think that's much > more cumbersome. > > Hope this helps. > > Mihai Limbasan > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
