Erwan MARC <
emarc@...> wrote:
>> PS for Jörg, I'll check if we have the option -lm or not, what is
>> the impact?
libgcc.a contains helper functions for floating-point math which are
mostly auto-generated and thus not quite efficient. libm.a, while
it's not its normal purpose, overrides a number of these functions
with more efficient versions.
It's been a historical mistake to separate libm.a from libc.a at all.
By the time avr-libc started, there was no reason other than ``because
it's always been that way'' to stuff the math functions into a
separate library. (When Unix started on the PDP-11, there have
probably been resource exhaustion reasons for this separation, to keep
the linker's job doable at all.)
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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