Hi all, I'm writing a simple inertial navigation system that should run on a ARM9 Microcontrollerboard assembled by Olimex. The Controller is an ATMEL AT91SAM9160. Since I get the basics working, I need to use sinus, cosine and tangent for further calculations. But when I implement these parts, the linker throws an error about undefined references to sinus, cosine and tangent. I've tested this with WinARM2006, WinARM2008 and yagarto. When I switch to WinARM2008 and the arm-eabi compiler, the linker throws also errors like undefined reference to “__eabi_d2f”. For linking and compiling I used the examples from ATMEL Software Package for the AT91SAM9160 from this site: http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4343 I also had a look in the examples from the WinARM compilation and added the linking directives from the WinARM examples in the makefile witch I use. So the linker and compiler use the libm.a and the math.h from WinARM or yagarto. I've tested these by renaming them in the directories. So, what do I have to do, to get these functions work proper? Kind regards, Christian
Please create a minimal example project to reproduce this (makefile, linker-script, startup-code, C-sources), pack it intro a zip- or tgz-archive and attach it to a message here.
Here is a minimum example with one sinus function. All files for link and make included. Hope it will help.
Christian Pietsch wrote: > Here is a minimum example with one sinus function. All files for link > and make included. Hope it will help. Try to modfiy the "linker-call"-line in the makefile so $(LDFLAGS) is the last element and not the one of the firsts. ... $(CC) -T"$(AT91LIB)/boards/$(BOARD)/$(CHIP)/$$@.lds" -o $(OUTPUT)-$$@.elf $$^ $(LDFLAGS) ... If have just tested with CS G++ lite for arm-eabi Version q1-2008 but this should not matter since I could reproduce the issue with this package too.
Martin Thomas wrote: > Try to modfiy the "linker-call"-line in the makefile so $(LDFLAGS) is > the last element and not the one of the firsts. > > ... > $(CC) -T"$(AT91LIB)/boards/$(BOARD)/$(CHIP)/$$@.lds" -o > $(OUTPUT)-$$@.elf $$^ $(LDFLAGS) > ... > > If have just tested with CS G++ lite for arm-eabi Version q1-2008 but > this should not matter since I could reproduce the issue with this > package too. Yes! It works. Thanks a lot. Such a little thing, an now it works. Thousand thanks, Christian