Add the AvrGcc toolchain to lock gcc version

Substitute documentation to reference AvrGcc by default, which locks gcc
to the dependency folder.

AnyAvrGcc is inteded to use any system/external gcc version (as the name
implies).

.vscode/cmake-kits.json

@@ -1,7 +1,7 @@
 [
     {
         "name": "Local_gcc-avr-none-eabi",
-        "toolchainFile": "${workspaceFolder}/cmake/AnyAvrGcc.cmake",
+        "toolchainFile": "${workspaceFolder}/cmake/AvrGcc.cmake",
         "cmakeSettings": {
             "CMAKE_MAKE_PROGRAM": "${workspaceFolder}/.dependencies/ninja-1.10.2/ninja"
         }

README.md

@@ -1,9 +1,7 @@
 # Prusa-Firmware-MMU-Private
 
 ## How to prepare build env and tools
-
-run `./utils/bootstrap.py`
-
+Run `./utils/bootstrap.py`
 
 `bootstrap.py` will now download all the "missing" dependencies into the `.dependencies` folder:
 - clang-format-9.0.0-noext
@@ -14,7 +12,7 @@ run `./utils/bootstrap.py`
 ## How to build the preliminary project so far:
 Now the process is the same as in the Buddy Firmware:
 ```
-utils/build.py
+./utils/build.py
 ```
 
 builds the firmware.hex in build/mmu_release
@@ -23,7 +21,7 @@ In case you'd like to build the project directly via cmake you can use an approa
 ```
 mkdir build
 cd build
-cmake .. -G Ninja -DCMAKE_TOOLCHAIN_FILE=../cmake/AnyAvrGcc.cmake
+cmake .. -G Ninja -DCMAKE_TOOLCHAIN_FILE=../cmake/AvrGcc.cmake
 ninja
 ```
 

cmake/AnyAvrGcc.cmake

@@ -25,6 +25,7 @@ set(TOOLCHAIN_PREFIX avr-)
 
 if(AVR_TOOLCHAIN_DIR)
   # using toolchain set by AvrGcc.cmake (locked version)
+  message("ToolChain dir is ${AVR_TOOLCHAIN_DIR}")
   set(BINUTILS_PATH "${AVR_TOOLCHAIN_DIR}/bin")
 else()
   # search for ANY avr-gcc toolchain

cmake/AvrGcc.cmake

@@ -0,0 +1,6 @@
+get_filename_component(PROJECT_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" DIRECTORY)
+
+set(AVR_GCC_VERSION 7.3.0)
+set(AVR_TOOLCHAIN_DIR "${PROJECT_CMAKE_DIR}/../.dependencies/gcc-avr-${AVR_GCC_VERSION}/")
+
+include("${PROJECT_CMAKE_DIR}/AnyAvrGcc.cmake")

utils/build.py

@@ -69,6 +69,7 @@ class BuildType(Enum):
 
 
 class BuildConfiguration(ABC):
+
     @abstractmethod
     def get_cmake_cache_entries(self):
         """Convert the build configuration to CMake cache entries."""
@@ -86,6 +87,7 @@ class BuildConfiguration(ABC):
 
 
 class FirmwareBuildConfiguration(BuildConfiguration):
+
     def __init__(self,
                  build_type: BuildType,
                  toolchain: Path = None,
@@ -103,7 +105,7 @@ class FirmwareBuildConfiguration(BuildConfiguration):
 
     @staticmethod
     def default_toolchain() -> Path:
-        return Path(__file__).resolve().parent.parent / 'cmake/AnyAvrGcc.cmake'
+        return Path(__file__).resolve().parent.parent / 'cmake/AvrGcc.cmake'
 
     def get_cmake_cache_entries(self):
         entries = []