Create the stub options.h android README documents and find ndk-build

Author: aidangarske

.github/workflows/cross-build.yml

@@ -229,14 +229,30 @@ jobs:
           distribution: temurin
           java-version: '17'
 
+      # android/README.md step 3: wolfSSL release tarballs ship wolfssl/options.h
+      # but a GitHub clone does not, and the jni sources include it.
+      - name: Create the stub options.h the README documents
+        run: |
+          set -euo pipefail
+          cd '${{ matrix.example }}'
+          if [ -f wolfssl/wolfssl/options.h.in ] && [ ! -f wolfssl/wolfssl/options.h ]; then
+            cp wolfssl/wolfssl/options.h.in wolfssl/wolfssl/options.h
+            echo "created wolfssl/wolfssl/options.h"
+          fi
+
       # These are Studio projects with no instrumentation harness, so a build is
       # the honest ceiling.
       - name: Build ${{ matrix.example }}
         run: |
           set -euo pipefail
           cd '${{ matrix.example }}'
-          if [ -f gradlew ]; then chmod +x gradlew; ./gradlew assembleDebug --no-daemon; \
-          else ndk-build || { echo "no gradlew and ndk-build failed"; exit 1; }; fi
+          if [ -f gradlew ]; then
+            chmod +x gradlew
+            ./gradlew assembleDebug --no-daemon
+          else
+            # the older standalone-toolchain sample: Android.mk + ndk-build
+            "${ANDROID_NDK_HOME:-$ANDROID_NDK_ROOT}/ndk-build"
+          fi
 
       - name: Assert an apk or .so came out
         run: |