diff --git a/.github/workflows/pnnx.yml b/.github/workflows/pnnx.yml
new file mode 100644
index 00000000000..5ea5eff4ba8
--- /dev/null
+++ b/.github/workflows/pnnx.yml
@@ -0,0 +1,49 @@
+name: pnnx
+on:
+  push:
+    branches: [master]
+    paths:
+    - '.github/workflows/pnnx.yml'
+    - 'tools/pnnx/**'
+    - '!tools/pnnx/README.md'
+  pull_request:
+    branches: [master]
+    paths:
+    - '.github/workflows/pnnx.yml'
+    - 'tools/pnnx/**'
+    - '!tools/pnnx/README.md'
+concurrency:
+  group: pnnx-${{ github.ref }}
+  cancel-in-progress: true
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: setup-pytorch
+      run: |
+        export PYTHONUSERBASE=$GITHUB_WORKSPACE/torch
+        pip install --user torch --index-url https://download.pytorch.org/whl/cpu
+
+    - name: build-pnnx
+      run: |
+        export PYTHONUSERBASE=$GITHUB_WORKSPACE/torch
+        cd tools/pnnx
+        mkdir build && cd build
+        cmake -DCMAKE_BUILD_TYPE=Release ..
+        cmake --build . -j 4
+
+    - name: quick-test
+      run: |
+        export PYTHONUSERBASE=$GITHUB_WORKSPACE/torch
+        cd tools/pnnx
+        cd build && ctest --output-on-failure -R test_nn_Conv
diff --git a/tools/pnnx/src/CMakeLists.txt b/tools/pnnx/src/CMakeLists.txt
index d56784646b5..b1ac6f5c024 100644
--- a/tools/pnnx/src/CMakeLists.txt
+++ b/tools/pnnx/src/CMakeLists.txt
@@ -625,6 +625,10 @@ if(PROTOBUF_FOUND)
             set_property(TARGET onnxruntime::onnxruntime APPEND PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_BINARY_DIR})
             set_property(TARGET onnxruntime::onnxruntime APPEND PROPERTY INTERFACE_LINK_LIBRARIES protobuf::libprotobuf)
         endif()
+
+        if(APPLE)
+            set_property(TARGET onnxruntime::onnxruntime APPEND PROPERTY INTERFACE_LINK_LIBRARIES "-framework CoreFoundation")
+        endif()
     endif()
 endif()
 
diff --git a/tools/pnnx/src/pass_ncnn/torch_istft.cpp b/tools/pnnx/src/pass_ncnn/torch_istft.cpp
index 3acbe654009..9d894aba7ab 100644
--- a/tools/pnnx/src/pass_ncnn/torch_istft.cpp
+++ b/tools/pnnx/src/pass_ncnn/torch_istft.cpp
@@ -106,10 +106,10 @@ static int detect_window_type(const std::vector<float>& window_data)
         if (!NearlyEqual(window_data[i], 1.f, 0.001))
             is_one = false;
 
-        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * M_PI * i / winlen)), 0.001))
+        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * 3.14159265358979323846 * i / winlen)), 0.001))
             is_hann = false;
 
-        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * M_PI * i / winlen), 0.001))
+        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * 3.14159265358979323846 * i / winlen), 0.001))
             is_hamming = false;
     }
 
diff --git a/tools/pnnx/src/pass_ncnn/torch_stft.cpp b/tools/pnnx/src/pass_ncnn/torch_stft.cpp
index 2b2296ccbc2..8993afeb12f 100644
--- a/tools/pnnx/src/pass_ncnn/torch_stft.cpp
+++ b/tools/pnnx/src/pass_ncnn/torch_stft.cpp
@@ -93,10 +93,10 @@ static int detect_window_type(const std::vector<float>& window_data)
         if (!NearlyEqual(window_data[i], 1.f, 0.001))
             is_one = false;
 
-        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * M_PI * i / winlen)), 0.001))
+        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * 3.14159265358979323846 * i / winlen)), 0.001))
             is_hann = false;
 
-        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * M_PI * i / winlen), 0.001))
+        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * 3.14159265358979323846 * i / winlen), 0.001))
             is_hamming = false;
     }
 
diff --git a/tools/pnnx/src/pass_ncnn/torchaudio_F_inverse_spectrogram.cpp b/tools/pnnx/src/pass_ncnn/torchaudio_F_inverse_spectrogram.cpp
index d712fcc2990..0c964790fb4 100644
--- a/tools/pnnx/src/pass_ncnn/torchaudio_F_inverse_spectrogram.cpp
+++ b/tools/pnnx/src/pass_ncnn/torchaudio_F_inverse_spectrogram.cpp
@@ -43,10 +43,10 @@ static int detect_window_type(const std::vector<float>& window_data)
         if (!NearlyEqual(window_data[i], 1.f, 0.001))
             is_one = false;
 
-        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * M_PI * i / winlen)), 0.001))
+        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * 3.14159265358979323846 * i / winlen)), 0.001))
             is_hann = false;
 
-        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * M_PI * i / winlen), 0.001))
+        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * 3.14159265358979323846 * i / winlen), 0.001))
             is_hamming = false;
     }
 
diff --git a/tools/pnnx/src/pass_ncnn/torchaudio_F_spectrogram.cpp b/tools/pnnx/src/pass_ncnn/torchaudio_F_spectrogram.cpp
index 04084ad0ba6..225fab7060e 100644
--- a/tools/pnnx/src/pass_ncnn/torchaudio_F_spectrogram.cpp
+++ b/tools/pnnx/src/pass_ncnn/torchaudio_F_spectrogram.cpp
@@ -43,10 +43,10 @@ static int detect_window_type(const std::vector<float>& window_data)
         if (!NearlyEqual(window_data[i], 1.f, 0.001))
             is_one = false;
 
-        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * M_PI * i / winlen)), 0.001))
+        if (!NearlyEqual(window_data[i], 0.5f * (1 - cos(2 * 3.14159265358979323846 * i / winlen)), 0.001))
             is_hann = false;
 
-        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * M_PI * i / winlen), 0.001))
+        if (!NearlyEqual(window_data[i], 0.54f - 0.46f * cos(2 * 3.14159265358979323846 * i / winlen), 0.001))
             is_hamming = false;
     }