Thomas Lockhart <thomas@fourpalms.org> writes:
> But I do override some parameters in my Makefile.custom:
> CFLAGS+= -g -O0 -DUSE_ASSERT_CHECKING
>> If you use -O0 then you miss most of the interesting warnings.
> ?? Not in this case. afaik -O0 suppresses most optimizations
In particular, you don't get "unused variable" and "variable may not
have been set before being used" warnings at -O0, because the
control-flow analysis needed to emit those warnings is not done at -O0.
I generally use -O1 for development; it's sometimes a little hairy
stepping through the generated code, but usually gcc works well enough
at -O1, and I get the important warnings.
regards, tom lane
