CI: Print memory usage.

Add a patch for CMakeLists.txt which adds -Wl,--print-memory-usage so
we can get at least some useful information about which builds are
running close to the limits.

.github/workflows/micropython.yml

@@ -92,6 +92,12 @@ jobs:
         source $BUILD_TOOLS
         hack_patch_micropython_disable_exceptions
 
+    - name: "HACK: CMakeLists.txt Print Memory Usage"
+      shell: bash
+      run: |
+        source $BUILD_TOOLS
+        hack_patch_micropython_print_memory_usage
+
     - name: "HACK: Pico SDK Patch"
       shell: bash
       run: |

ci/micropython.sh

@@ -49,6 +49,12 @@ function hack_patch_micropython_disable_exceptions {
     cd ../
 }
 
+function hack_patch_micropython_print_memory_usage {
+    cd micropython
+    git apply $PIMORONI_PICO_DIR/micropython/micropython_print_memory_usage.patch
+    cd ../
+}
+
 function hack_patch_pico_sdk {
     # pico-sdk-patch.sh will apply the patch if it exists
     cd micropython

micropython/micropython_print_memory_usage.patch

@@ -0,0 +1,12 @@
+diff --git a/ports/rp2/CMakeLists.txt b/ports/rp2/CMakeLists.txt
+index 2697efe28..cd35392be 100644
+--- a/ports/rp2/CMakeLists.txt
++++ b/ports/rp2/CMakeLists.txt
+@@ -451,6 +451,7 @@ target_compile_options(${MICROPY_TARGET} PRIVATE
+ target_link_options(${MICROPY_TARGET} PRIVATE
+     -Wl,--defsym=__micropy_c_heap_size__=${MICROPY_C_HEAP_SIZE}
+     -Wl,--wrap=dcd_event_handler
++    -Wl,--print-memory-usage
+ )
+ 
+ # Do not include stack unwinding & exception handling for C++ user modules