undefined reference to `_sbrk' when using AutoShift with Ergodox Infinity

[twhiston]

Hi,
I found that if i enabled AutoShift on the Ergodox Infinity the build failed.

Linking: .build/ergodox_infinity_workman.elf                                                        [ERRORS]
 | 
 | /usr/local/Cellar/gcc-arm-none-eabi/20160928/bin/../lib/gcc/arm-none-eabi/5.4.1/../../../../arm-none-eabi/lib/armv7e-m/libg.a(lib_a-sbrkr.o): In function `_sbrk_r':
 | sbrkr.c:(.text._sbrk_r+0xc): undefined reference to `_sbrk'
 | collect2: error: ld returned 1 exit status
 | 
make[1]: *** [.build/ergodox_infinity_workman.elf] Error 1
make: *** [ergodox_infinity:workman:dfu-util] Error 1

Solution seems to be to add $(CHIBIOS)/os/various/syscalls.c to the SRC value in rules.mk for the board, but not sure if you want that always added.

[drashna]

If you alter the make process, you don't need to always add it.

I've issued a pull request that fixes this: #2608.

You can pull the diff from that page and apply. But I can confirm that it compiles properly now.

[fredizzimo]

The real reason why it fails, is that it's including stdio.h and using snprintf. The QMK print functions should be used instead of that, since we don't have a standard console for the output.

I'm re-opening this issue, so that a proper fix can be made. I will probably do that tomorrow.

[drashna]

This should be fixed in #2608 I think.

[jackhumbert]

I think this is fixed now with #8268 being merged - if not, please reopen!