diff --git a/platform.txt b/platform.txt
index ebdfd20d..e55ba40d 100644
--- a/platform.txt
+++ b/platform.txt
@@ -34,7 +34,7 @@ compiler.elf2hex.flags=-O binary
 compiler.elf2hex.cmd=arm-none-eabi-objcopy
 compiler.ldflags=
 compiler.size.cmd=arm-none-eabi-size
-compiler.define=-DARDUINO=
+compiler.define=-DARDUINO= -DPLATFORM=
 compiler.combine.flags=-u _sbrk -u link -u _close -u _fstat -u _isatty -u _lseek -u _read -u _write -u _exit -u kill -u _getpid
 
 # This can be overridden in boards.txt
@@ -48,6 +48,14 @@ compiler.S.extra_flags=
 compiler.ar.extra_flags=
 compiler.elf2hex.extra_flags=
 
+# These can be overridden in platform.sketch.txt
+build.sketch_flags=
+compiler.c.sketch_flags=
+compiler.c.elf.sketch_flags=
+compiler.cpp.sketch_flags=
+compiler.S.sketch_flags=
+compiler.ar.sketch_flags=
+compiler.elf2hex.sketch_flags=
 
 compiler.libsam.c.flags="-I{build.system.path}/libsam" "-I{build.system.path}/CMSIS/CMSIS/Include/" "-I{build.system.path}/CMSIS/Device/ATMEL/"
 
@@ -64,24 +72,24 @@ build.usb_manufacturer="Unknown"
 # ---------------------
 
 ## Compile c files
-recipe.c.o.pattern="{compiler.path}{compiler.c.cmd}" {compiler.c.flags} -mcpu={build.mcu} -mthumb -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.c.extra_flags} {build.extra_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
+recipe.c.o.pattern="{compiler.path}{compiler.c.cmd}" {compiler.c.flags} -mcpu={build.mcu} -mthumb -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_BOARD="{build.board}" -DARDUINO_ARCH_{build.arch} -DARDUINO_ARCH="{build.arch}" -DPLATFORM="{version}" {compiler.c.extra_flags} {build.extra_flags} {compiler.c.sketch_flags} {build.sketch_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
 
 ## Compile c++ files
-recipe.cpp.o.pattern="{compiler.path}{compiler.cpp.cmd}" {compiler.cpp.flags} -mcpu={build.mcu} -mthumb -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.cpp.extra_flags} {build.extra_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
+recipe.cpp.o.pattern="{compiler.path}{compiler.cpp.cmd}" {compiler.cpp.flags} -mcpu={build.mcu} -mthumb -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_BOARD="{build.board}" -DARDUINO_ARCH_{build.arch} -DARDUINO_ARCH="{build.arch}" -DPLATFORM="{version}" {compiler.cpp.extra_flags} {build.extra_flags} {compiler.cpp.sketch_flags} {build.sketch_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
 
 ## Compile S files
-recipe.S.o.pattern="{compiler.path}{compiler.S.cmd}" {compiler.S.flags} -mcpu={build.mcu} -mthumb -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.S.extra_flags} {build.extra_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
+recipe.S.o.pattern="{compiler.path}{compiler.S.cmd}" {compiler.S.flags} -mcpu={build.mcu} -mthumb -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_BOARD="{build.board}" -DARDUINO_ARCH_{build.arch} -DARDUINO_ARCH="{build.arch}" -DPLATFORM="{version}" {compiler.S.extra_flags} {build.extra_flags} {compiler.S.sketch_flags} {build.sketch_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
 
 ## Create archives
 # archive_file_path is needed for backwards compatibility with IDE 1.6.5 or older, IDE 1.6.6 or newer overrides this value
 archive_file_path={build.path}/{archive_file}
-recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} {compiler.ar.extra_flags} "{archive_file_path}" "{object_file}"
+recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} {compiler.ar.extra_flags} {compiler.ar.sketch_flags} "{archive_file_path}" "{object_file}"
 
 ## Combine gc-sections, archives, and objects
-recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" -mcpu={build.mcu} -mthumb {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--start-group {compiler.combine.flags} {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" -mcpu={build.mcu} -mthumb {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} {compiler.c.elf.sketch_flags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--entry=Reset_Handler -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--start-group {compiler.combine.flags} {object_files} "{build.variant.path}/{build.variant_system_lib}" "{build.path}/{archive_file}" -Wl,--end-group -lm -gcc
 
 ## Create output (.bin file)
-recipe.objcopy.bin.pattern="{compiler.path}{compiler.elf2hex.cmd}" {compiler.elf2hex.flags} {compiler.elf2hex.extra_flags} "{build.path}/{build.project_name}.elf" "{build.path}/{build.project_name}.bin"
+recipe.objcopy.bin.pattern="{compiler.path}{compiler.elf2hex.cmd}" {compiler.elf2hex.flags} {compiler.elf2hex.extra_flags} {compiler.elf2hex.sketch_flags} "{build.path}/{build.project_name}.elf" "{build.path}/{build.project_name}.bin"
 
 ## Save hex
 recipe.output.tmp_file={build.project_name}.bin