Move nano specs hack into our module cmake files.

We've been maintaining a downstream patch to disable C++ exception
handling, which gives us some headroom before our builds get too big and
overwrite themselves at runtime.

Forgetting to apply this patch is a constant source of debugging
frustration. It turns out it can just be added to our USER_C_MODULES cmake
files instead, where it will implicitly be included when building against
our modules.

.github/workflows/micropython.yml

@@ -95,12 +95,6 @@ jobs:
         source $BUILD_TOOLS
         micropython_build_mpy_cross
 
-    - name: "HACK: CMakeLists.txt Disable C++ Exceptions Patch"
-      shell: bash
-      run: |
-        source $BUILD_TOOLS
-        hack_patch_micropython_disable_exceptions
-
     - name: "HACK: Pico SDK Patch"
       shell: bash
       run: |

ci/micropython.sh

@@ -44,12 +44,6 @@ function micropython_version {
     echo "MICROPY_GIT_HASH=$MICROPYTHON_VERSION-$TAG_OR_SHA" >> $GITHUB_ENV
 }
 
-function hack_patch_micropython_disable_exceptions {
-    cd micropython
-    git apply $PIMORONI_PICO_DIR/micropython/micropython_nano_specs.patch
-    cd ../
-}
-
 function hack_patch_pico_sdk {
     # pico-sdk-patch.sh will apply the patch if it exists
     cd micropython

micropython/micropython_nano_specs.patch

@@ -1,21 +0,0 @@
-diff --git a/ports/rp2/CMakeLists.txt b/ports/rp2/CMakeLists.txt
-index fcc435b7b..efabcb3a3 100644
---- a/ports/rp2/CMakeLists.txt
-+++ b/ports/rp2/CMakeLists.txt
-@@ -464,6 +464,16 @@ set_source_files_properties(
-     COMPILE_OPTIONS "-O2"
- )
- 
-+# Do not include stack unwinding & exception handling for C++ user modules
-+target_compile_definitions(usermod INTERFACE PICO_CXX_ENABLE_EXCEPTIONS=0)
-+target_compile_options(usermod INTERFACE $<$<COMPILE_LANGUAGE:CXX>:
-+    -fno-exceptions
-+    -fno-unwind-tables
-+    -fno-rtti
-+    -fno-use-cxa-atexit
-+>)
-+target_link_options(usermod INTERFACE -specs=nano.specs)
-+
- set_source_files_properties(
-     ${PICO_SDK_PATH}/src/rp2_common/pico_double/double_math.c
-     ${PICO_SDK_PATH}/src/rp2_common/pico_float/float_math.c

micropython/modules/micropython-cosmic_unicorn.cmake

@@ -39,3 +39,6 @@ include(modules_py/modules_py)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-disable-exceptions.cmake

@@ -0,0 +1,9 @@
+# Do not include stack unwinding & exception handling for C++ user modules
+target_compile_definitions(usermod INTERFACE PICO_CXX_ENABLE_EXCEPTIONS=0)
+target_compile_options(usermod INTERFACE $<$<COMPILE_LANGUAGE:CXX>:
+    -fno-exceptions
+    -fno-unwind-tables
+    -fno-rtti
+    -fno-use-cxa-atexit
+>)
+target_link_options(usermod INTERFACE -specs=nano.specs)

micropython/modules/micropython-enviro.cmake

@@ -47,4 +47,7 @@ include(motor/micropython)
 include(modules_py/modules_py)
 
 # C++ Magic Memory
-include(cppmem/micropython)
+include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-galactic_unicorn.cmake

@@ -39,3 +39,6 @@ include(modules_py/modules_py)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-inky_frame.cmake

@@ -50,3 +50,6 @@ copy_module(inky_frame.py)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-pico.cmake

@@ -12,3 +12,6 @@ include(pico_wireless/micropython)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-pico_usb.cmake

@@ -12,3 +12,6 @@ include(pico_wireless/micropython)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-picolipo_16mb.cmake

@@ -14,3 +14,6 @@ enable_ulab()
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-picolipo_4mb.cmake

@@ -14,3 +14,6 @@ enable_ulab()
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-picow.cmake

@@ -11,3 +11,6 @@ include(micropython-common)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-stellar_unicorn.cmake

@@ -39,3 +39,6 @@ include(modules_py/modules_py)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-tiny2040_8mb.cmake

@@ -11,3 +11,6 @@ include(micropython-common)
 
 # C++ Magic Memory
 include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)

micropython/modules/micropython-tufty2040.cmake

@@ -44,4 +44,7 @@ enable_ulab()
 include(modules_py/modules_py)
 
 # C++ Magic Memory
-include(cppmem/micropython)
+include(cppmem/micropython)
+
+# Disable build-busting C++ exceptions
+include(micropython-disable-exceptions)