added cygwin tests to github actions

Author: Cyan4973

.github/workflows/dev-short-tests.yml

@@ -445,8 +445,20 @@ jobs:
         COPY build\VS2010\bin\${{matrix.platform}}_${{matrix.configuration}}\*.exe tests\
         CD tests
         sh -e playTests.sh
-        DIR
-        .\fuzzer.exe -T2m
+        fuzzer.exe -T2m
+
+  cygwin-tests:
+    runs-on: windows-latest
+    steps:
+    - run: git config --global core.autocrlf input
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # tag=v3
+    - uses: cygwin/cygwin-install-action@master
+    - run: |
+        make -v
+        setx CFLAGS "-Werror -O1"
+        make -j allzstd
+        make check
+        .\tests\fuzzer.exe -T1m
 
   intel-cet-compatibility:
     runs-on: ubuntu-latest