Re: LuaBitOp: Cant require "bit=>./bit.so: undefined symbol: luaopen_bit
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- Subject: Re: LuaBitOp: Cant require "bit=>./bit.so: undefined symbol: luaopen_bit
- From: Mike Pall <mikelu-1212@...>
- Date: Mon, 3 Dec 2012 12:49:20 +0100
Wolfgang Pupp wrote:
> If debugging is not necessary:
> -O2 -fomit-frame-pointer
It's a common myth that -fomit-frame-pointer interferes with
debugging (-g). That hasn't been the case in many years for a GNU
toolchain with DWARF debug info.
Also, -fomit-frame-pointer is *implied* by -O2 (or even -O) 'on
machines where doing so does not interfere with debugging' (quote
from GCC manual).
They only kept the behavior on x86 (32 bit) for historic reasons.
But since GCC 4.6, -fomit-frame-pointer is the default on any
currently in use architecture, including x86 (32 bit).
All of that boils down to: ==> Use -O2 <== Period.
--Mike