Adding preprocessing recipes to AVR core

Author: Federico Fissore

arduino/avr/platform.txt

@@ -81,6 +81,12 @@ recipe.size.regex=^(?:\.text|\.data|\.bootloader)\s+([0-9]+).*
 recipe.size.regex.data=^(?:\.data|\.bss|\.noinit)\s+([0-9]+).*
 recipe.size.regex.eeprom=^(?:\.eeprom)\s+([0-9]+).*
 
+## Preprocessor
+preproc.includes.flags=-w -x c++ -M -MG -MP
+recipe.preproc.includes="{compiler.path}{compiler.cpp.cmd}" {compiler.cpp.flags} {preproc.includes.flags} -mmcu={build.mcu} -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.cpp.extra_flags} {build.extra_flags} "{source_file}"
+
+preproc.macros.flags=-w -x c++ -E -CC
+recipe.preproc.macros="{compiler.path}{compiler.cpp.cmd}" {compiler.cpp.flags} {preproc.macros.flags} -mmcu={build.mcu} -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.cpp.extra_flags} {build.extra_flags} {includes} "{source_file}"
 
 # AVR Uploader/Programmers tools
 # ------------------------------