I get the following warning when I compile a sketch using the String Class:
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/gcc-arm-none-eabi-4.8.3-2014q1/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/lib/armv7-m/libg.a(lib_a-sbrkr.o): In function _sbrk_r': sbrkr.c:(.text._sbrk_r+0xc): warning: undefined reference to_sbrk'
Compilation will complete, but the board will hang when running. When the same sketch is compiled with the Arduino IDE it compiles and runs with no problem.
I get the following warning when I compile a sketch using the String Class: /Applications/Arduino.app/Contents/Resources/Java/hardware/tools/gcc-arm-none-eabi-4.8.3-2014q1/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/lib/armv7-m/libg.a(lib_a-sbrkr.o): In function
_sbrk_r': sbrkr.c:(.text._sbrk_r+0xc): warning: undefined reference to_sbrk'Compilation will complete, but the board will hang when running. When the same sketch is compiled with the Arduino IDE it compiles and runs with no problem.