nrf51822 build script under MacOSX
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Usage:
1. make erase_all

2. make debug

3. make release

4. make flash

5. make pin-reset

6. make serial # will start screen as your terminal

7. make gdbserver # will start gdbserver (-LocalHostOnly)

8. make gdb # will start gdb and set breakpoint at main then start

Steps:
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0. download and extract nRF51-SDK 6.0.0 and s110 softdevice 7.0.0 

1. install arm-none-eabi-gcc for MacOSX:

    from: https://launchpad.net/gcc-arm-embedded

2. create your project file

3. copy Makefile.template as Makefile to your project directory

4. modify Makefile variable to suit your environment

5. (optional) change Makefile.posix to suit your gcc version

6. make

7. make erase_all

8. make flash_softdevice

9. make flash

note[2]: Currently JLink (for MacOSX) v4.90b will not require disabling CDC, highly recommend use that new version, that will allow use GDB and virtual com port simutaneously. OpenOCD users could use openocd_flash and openocd_flash_softdevice6 options after adjusting $OPENOCD command at Makefile.common file.