feat: ceedling cross compile

crates/algorithms/algorithms-c/README.md

@@ -3,3 +3,18 @@
 This subproject contains all C Code for the benchmarking. It is built with 
 [ceedling](https://www.throwtheswitch.org/ceedling), a more modern build tool 
 for C projects that also integrates well with the Unity framework.
+
+## Compiler
+
+To compile for STM32, you need to crosscompile
+
+```
+# apt install binutils-arm-none-eabi gcc-arm-none-eabi
+```
+
+Then, use your tool with an `arm-none-eabi-` prefix: `arm-none-eabi-gcc`. This 
+project has been configured to use `arm-none-eabi-gcc` to compile modules and to 
+"link" the object files into a static library with `arm-none-eabi-ar`.
+
+The unit tests will be compiled with `gcc` to be ran on the host computer, not 
+on the STM32.

crates/algorithms/algorithms-c/project.yml

@@ -340,7 +340,7 @@
 # TOOLCHAIN CONFIGURATION
 ################################################################
 
-#:tools:
+:tools:
 # Ceedling defaults to using gcc for compiling, linking, etc.
 # As [:tools] is blank, gcc will be used (so long as it's in your system path)
 # See documentation to configure a given toolchain for use
@@ -380,20 +380,26 @@
 #     :arguments: []
 #     :name: 
 #     :optional: FALSE
-#   :release_compiler: 
-#     :executable:
-#     :arguments: []
-#     :name: 
-#     :optional: FALSE
-#   :release_linker: 
-#     :executable:
-#     :arguments: []
-#     :name: 
-#     :optional: FALSE
+  :release_compiler: 
+    :executable: arm-none-eabi-gcc
+    :arguments: 
+      - "-g" 
+      - "-Wall"
+      - "-c"
+      - "${1}"
+      - "-o"
+      - "${2}"
+    :optional: FALSE
+  :release_linker: 
+    :executable: arm-none-eabi-ar
+    :arguments:
+      - "-rcs"
+      - "${2}"
+      - "${1}"
+    :optional: FALSE
   # :release_assembler: 
-#     :executable:
-#     :arguments: []
-#     :name: 
+  #   :executable: arm-none-eabi-as
+  #   :arguments: ["$@"]
   #   :optional: FALSE
 #   :release_dependencies_generator: 
 #     :executable: