diff --git a/.github/workflows/compile-test.yml b/.github/workflows/compile-test.yml
index 2a05e3495..d1ec99799 100644
--- a/.github/workflows/compile-test.yml
+++ b/.github/workflows/compile-test.yml
@@ -14,9 +14,15 @@ jobs:
           - os: ubuntu-20.04
             php: "php7.4"
             php-config: "php-config7.4"
+            cc: "gcc"
           - os: ubuntu-22.04
             php: "php8.1"
             php-config: "php-config8.1"
+            cc: "gcc"
+          - os: ubuntu-22.04
+            php: "php8.1"
+            php-config: "php-config8.1"
+            cc: "clang"
 
     runs-on: ${{ matrix.os }}
 
@@ -43,16 +49,16 @@ jobs:
           libcurl4-openssl-dev \
           openjdk-11-jdk libgloox-dev gccgo \
           cli-common-dev mono-devel mono-mcs uuid-dev \
-          curl check
-    - uses: actions/checkout@v2
-    - name: Build kitchensink uWSGI binary
-      run: UWSGICONFIG_PHPPATH=${{ matrix.php-config }} /usr/bin/python3 uwsgiconfig.py --build travis
+          curl check ${{ matrix.cc == 'clang' && 'clang' || '' }}
+    - uses: actions/checkout@v4
+    - name: Build kitchensink uWSGI binary with gcc or default with clang
+      run: CC=${{ matrix.cc }} UWSGICONFIG_PHPPATH=${{ matrix.php-config }} /usr/bin/python3 uwsgiconfig.py --build ${{ matrix.cc == 'gcc' && 'travis' || '' }}
     - name: Build uWSGI binary
       run: |
-        /usr/bin/python3 uwsgiconfig.py --build base
+        CC=${{ matrix.cc }} /usr/bin/python3 uwsgiconfig.py --build base
     - name: Build cgi plugin
       run: |
-        /usr/bin/python3 uwsgiconfig.py --plugin plugins/cgi base
+        CC=${{ matrix.cc }} /usr/bin/python3 uwsgiconfig.py --plugin plugins/cgi base
     - name: Build dummy plugin
       run: |
-        /usr/bin/python3 uwsgiconfig.py --plugin plugins/dummy base
+        CC=${{ matrix.cc }} /usr/bin/python3 uwsgiconfig.py --plugin plugins/dummy base
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 009d48438..ba0cbbb49 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,7 +27,7 @@ jobs:
       if: contains(fromJson('["3.6","3.7","3.8","3.9","3.10","3.11","3.12"]'), matrix.python-version)
       run: |
         sudo apt install --no-install-recommends -qqyf python${{ matrix.python-version }}-distutils \
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Run unit tests
       if: matrix.test-suite == 'unittest'
       run: make tests
@@ -61,7 +61,7 @@ jobs:
         sudo apt install --no-install-recommends -qqyf python3-dev \
           libpcre3-dev libjansson-dev libcap2-dev ruby2.7-dev \
           curl check
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Run unit tests
       run: make tests
     - name: Build uWSGI binary
diff --git a/uwsgiconfig.py b/uwsgiconfig.py
index 8fe31ccb1..ad1bef1d8 100644
--- a/uwsgiconfig.py
+++ b/uwsgiconfig.py
@@ -679,16 +679,18 @@ def __init__(self, filename, mute=False):
         if 'UWSGI_INCLUDES' in os.environ:
             self.include_path += os.environ['UWSGI_INCLUDES'].split(',')
 
-        self.cflags = [
+        cflags = [
             '-O2',
             '-I.',
             '-Wall',
             '-Werror',
-            '-Wformat-signedness',
             '-Wno-error=deprecated-declarations',
             '-D_LARGEFILE_SOURCE',
             '-D_FILE_OFFSET_BITS=64'
-        ] + os.environ.get("CFLAGS", "").split() + self.get('cflags', '').split()
+        ]
+        if "gcc" in GCC:
+            cflags.append('-Wformat-signedness')
+        self.cflags = cflags + os.environ.get("CFLAGS", "").split() + self.get('cflags', '').split()
 
         python_venv_include = os.path.join(sys.prefix, 'include', 'site',
                                            'python{0}.{1}'.format(*sys.version_info))