Initial support for AnyAvrGcc toolchain

cmake/AnyAvrGcc.cmake

@@ -0,0 +1,86 @@
+get_filename_component(PROJECT_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" DIRECTORY)
+include("${PROJECT_CMAKE_DIR}/Utilities.cmake")
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_SYSTEM_PROCESSOR avr)
+
+#
+# Utilities
+
+if(MINGW
+   OR CYGWIN
+   OR WIN32
+   )
+  set(UTIL_SEARCH_CMD where)
+  set(EXECUTABLE_SUFFIX ".exe")
+elseif(UNIX OR APPLE)
+  set(UTIL_SEARCH_CMD which)
+  set(EXECUTABLE_SUFFIX "")
+endif()
+
+set(TOOLCHAIN_PREFIX avr-)
+
+#
+# Looking up the toolchain
+#
+
+if(GCC_TOOLCHAIN_DIR)
+  # using toolchain set by AvrGcc.cmake (locked version)
+  set(BINUTILS_PATH "${AVR_TOOLCHAIN_DIR}/bin")
+else()
+  # search for ANY avr-gcc toolchain
+  execute_process(
+    COMMAND ${UTIL_SEARCH_CMD} ${TOOLCHAIN_PREFIX}gcc
+    OUTPUT_VARIABLE AVR_GCC_PATH
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    RESULT_VARIABLE FIND_RESULT
+    )
+  # found?
+  if(NOT "${FIND_RESULT}" STREQUAL "0")
+    message(FATAL_ERROR "avr-gcc not found")
+  endif()
+  get_filename_component(BINUTILS_PATH "${AVR_GCC_PATH}" DIRECTORY)
+  get_filename_component(AVR_TOOLCHAIN_DIR ${BINUTILS_PATH} DIRECTORY)
+endif()
+
+#
+# Setup CMake
+#
+
+# Without that flag CMake is not able to pass test compilation check
+set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+
+set(CMAKE_C_COMPILER
+    "${BINUTILS_PATH}/${TOOLCHAIN_PREFIX}gcc${EXECUTABLE_SUFFIX}"
+    CACHE FILEPATH "" FORCE
+    )
+set(CMAKE_ASM_COMPILER
+    "${BINUTILS_PATH}/${TOOLCHAIN_PREFIX}gcc${EXECUTABLE_SUFFIX}"
+    CACHE FILEPATH "" FORCE
+    )
+set(CMAKE_CXX_COMPILER
+    "${BINUTILS_PATH}/${TOOLCHAIN_PREFIX}g++${EXECUTABLE_SUFFIX}"
+    CACHE FILEPATH "" FORCE
+    )
+set(CMAKE_EXE_LINKER_FLAGS_INIT
+    ""
+    CACHE STRING "" FORCE
+    )
+
+set(CMAKE_ASM_COMPILE_OBJECT
+    "<CMAKE_ASM_COMPILER> <DEFINES> <FLAGS> -o <OBJECT> -c <SOURCE>"
+    CACHE STRING "" FORCE
+    )
+
+set(CMAKE_OBJCOPY
+    "${BINUTILS_PATH}/${TOOLCHAIN_PREFIX}objcopy${EXECUTABLE_SUFFIX}"
+    CACHE INTERNAL "objcopy tool"
+    )
+set(CMAKE_SIZE_UTIL
+    "${BINUTILS_PATH}/${TOOLCHAIN_PREFIX}size${EXECUTABLE_SUFFIX}"
+    CACHE INTERNAL "size tool"
+    )
+
+set(CMAKE_FIND_ROOT_PATH "${ARM_TOOLCHAIN_DIR}")
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

cmake/Utilities.cmake

@@ -9,7 +9,7 @@ endif()
 function(get_recommended_gcc_version var)
   execute_process(
     COMMAND "${Python3_EXECUTABLE}" "${PROJECT_ROOT_DIR}/utils/bootstrap.py"
-            "--print-dependency-version" "gcc-arm-none-eabi"
+            "--print-dependency-version" "gcc-avr"
     OUTPUT_VARIABLE RECOMMENDED_VERSION
     OUTPUT_STRIP_TRAILING_WHITESPACE
     RESULT_VARIABLE RETVAL

utils/bootstrap.py

@@ -44,7 +44,7 @@ dependencies = {
             'Darwin': 'https://github.com/Kitware/CMake/releases/download/v3.15.5/cmake-3.15.5-Darwin-x86_64.tar.gz',
         },
     },
-    'avr8-gnu-toolchain': {
+    'gcc-avr': {
         'version': '5.4.0',
         'url': {
             'Linux': 'https://xxxarmkeil.blob.core.windows.net/developer/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2',