More debugging info

Author: tannewt

.github/actions/deps/ports/zephyr-cp/action.yml

@@ -19,3 +19,8 @@ runs:
       run: west zephyr-export
       shell: bash
       working-directory: ports/zephyr-cp
+    - name: Dump windows info
+      if: runner.os == 'Windows'
+      run: |
+        D:/a/circuitpython/circuitpython/ports/zephyr-cp/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe --version
+      working-directory: ports/zephyr-cp

ports/zephyr-cp/cptools/cpbuild.py

@@ -348,13 +348,15 @@ async def preprocess(
         depfile = output_file.parent / (output_file.name + ".d")
         if depfile.exists():
             pass
+        print("Preprocessing:", source_file.relative_to(self.srcdir))
         await run_command(
             [
                 self.c_compiler,
                 "-E",
                 "-MMD",
                 "-MF",
                 depfile,
+                "-v",
                 "-c",
                 source_file,
                 self.cflags_file,