Re: [libopencm3-devel] LPC11xx library source

[František B. <bu...@se...>]

hi all,



i was tested the lto before, but after a while, i disabled it because the 
debugging support is bad. static inline is better way to optimize for speed 
and still stay debuggable.



second way is to use llvm which has lto with correct support, but for that 
we must deal with correct weak pragmas in libopencm3. current state is non-
portable and is broking standard (but works with arm-none-eabi-gcc which has
implementation exception).



for final builds, the lto is good option to slightly reduce code size.



regards,



frantisek burian



ps. written from mobile phone. 



---------- Původní zpráva ----------

Od: Tymm Twillman 

Datum: 26. 7. 2014 v 06:49:37

Předmět: Re: [libopencm3-devel] LPC11xx library source



Wow, thank you for that. Somehow never had come across the -ftlo flag… from 
a quick test it seems quite impressive :) On Jul 25, 2014, at 9:32 PM, Paul 
Fertser wrote: > Hi, > > Thank you, Tymm. > > A vaguely related note below. 
> > On Fri, Jul 25, 2014 at 12:16:23PM -0700, Tymm Twillman wrote: >> 
Development style is such that tiny functions that should require >> only a 
few instructions are done as static inline > > I've recently tried using LTO
and so far I'm quite pleased with the > results, the code size reduction is 
very noticeable and it looks like > with LTO one can get away without static
inline. > > This is not to imply that you're doing something wrong (quite to
the > contrary) but to encourage list members to try enabling LTO one day. >
> Happy hacking! > -- > Be free, use free (http://www.gnu.org/philosophy/
free-sw.html) software! > mailto:fer...@gm... -----------------------
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