Bug 509450

Summary:	dev-embedded/avr-libc 1.8.0 should build crtm32u4.o
Product:	Gentoo Linux	Reporter:	Roc Vallès <vallesroc>
Component:	[OLD] Development	Assignee:	Embedded Team (OBSOLETE) <dev-embedded+disabled>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	orzel
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Roc Vallès 2014-05-03 11:20:34 UTC

Need to develop for an Atmega 32u4. These chips are relatively new but popular (because of their use in Arduino Leonardo). I hadn't in a long time, so I got myself a new crossdev environment through:

crossdev -t avr

which results in a gcc-4.8.2, avr-libc 1.8.0, binutils 2.24 toolchain.

avr-libc 1.8.0 does build these files for the chips it does support:
(...)
/usr/avr/lib/avr5/crtcan32.o
/usr/avr/lib/avr5/crtm32.o
/usr/avr/lib/avr5/crtm323.o
/usr/avr/lib/avr5/crtm324p.o
/usr/avr/lib/avr5/crtm325.o
/usr/avr/lib/avr5/crtm325p.o
/usr/avr/lib/avr5/crtm3250.o
/usr/avr/lib/avr5/crtm3250p.o
/usr/avr/lib/avr5/crtm328p.o
(...)

But for reasons unknown, it isn't building the one for 32u4, crtm32u4.o, which is supported in avr-libc 1.8.0 and has been for a few versions of avr-libc before that.

Comment 1 Thomas Capricelli 2015-11-15 00:39:11 UTC

at configure time, avr-libc checks for what gcc supports. Like this :

...
checking if avr-gcc has support for atmega32u4... yes
...

Maybe at time of install your gcc was not reporting this chip ?

Comment 2 Thomas Capricelli 2015-11-15 00:41:43 UTC

It seems to work here : 

% equery files cross-avr/avr-libc | grep 32u4
/usr/avr/include/avr/iom32u4.h
/usr/avr/lib/avr5/crtm32u4.o
/usr/lib/debug/usr/avr/lib/avr5/crtm32u4.o.debug