ci: add Clang ASAN/UBSAN workflow; fix unused WAV var in oac_demo

Author: akashtc

.github/workflows/clang-sanitizers.yml

@@ -0,0 +1,34 @@
+name: Clang/ASAN/UBSAN
+
+on:
+  push:
+    branches: [ main, wip/** ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-and-test-sanitizers:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y clang llvm-dev libclang-dev build-essential autotools-dev automake autoconf libtool pkg-config
+
+      - name: Configure with sanitizers
+        env:
+          CC: clang
+          CFLAGS: "-g -O1 -fsanitize=address,undefined -fno-omit-frame-pointer"
+          LDFLAGS: "-fsanitize=address,undefined"
+        run: |
+          ./autogen.sh || true
+          ./configure CC=$CC CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS"
+
+      - name: Build
+        run: make -j$(nproc)
+
+      - name: Run tests
+        run: make check -j2

src/oac_demo.c

@@ -430,7 +430,6 @@ int main(int argc, char *argv[]) {
     int output_wav = 0;
     oac_uint64 wav_data_bytes = 0;
     int input_wav = 0;
-    uint32_t input_wav_data_size = 0;
     long input_wav_data_start = 0;
     int stop = 0;
     oac_int32 *in = NULL;
@@ -815,7 +814,6 @@ int main(int argc, char *argv[]) {
                     }
                     uint32_t cs = chunk[4] | (chunk[5]<<8) | (chunk[6]<<16) | (chunk[7]<<24);
                     if (memcmp(chunk, "data", 4) == 0) {
-                        input_wav_data_size = cs;
                         input_wav_data_start = ftell(fin);
                         break;
                     } else {