[Bug] Linking when adding DEBOUNCE_TYPE other than default WhiteFox

[albertogg]

Hi!, I'm getting an error while linking when changing the DEBOUNCE_TYPE to either eager_pr or eager_pk on the WhiteFox. This does not happen with sym_g. If there's anything else I can provide let me know.

My current rules.mk overrides options are:

BACKLIGHT_ENABLE  = no
BOOTMAGIC_ENABLE  = no
VISUALIZER_ENABLE = no
DEBOUNCE_TYPE     = eager_pk

The error I'm getting:

Linking: .build/whitefox_albertogg.elf                                                              [ERRORS]
 | 
 | /bin/../lib/gcc/arm-none-eabi/6.3.1/../../../../arm-none-eabi/lib/thumb/v7e-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
 | 
tmk_core/rules.mk:298: recipe for target '.build/whitefox_albertogg.elf' failed
make[1]: *** [.build/whitefox_albertogg.elf] Error 1

System Information

• Keyboard:
  • Revision (if applicable): WhiteFox, vanilla layout revision v1.1
• Operating system: macOS
• AVR GCC version: whatever is in the latest Docker qmkfm/base_container

• ARM GCC version: same as above

• QMK Firmware version: 0.7.129

• Any keyboard related software installed?
  • AutoHotKey
  • Karabiner
  • Other:

[zvecr]

The cause (and a workaround) can be seen within #7059.

[albertogg]

Thanks @zvecr, I guess we can close this as it seems to be an issue not easily solvable. Quick question is this workaround safe to use?

[zvecr]

"safe" depends on a few things, we don't malloc much so there are not a lot of scenarios where we would be leaking. That said, the workaround hasn't had much exposure so YMMV.

[albertogg]

Thanks! @zvecr