260512.231143.CST [skip ci] test mingw 6.4

Author: zaikunzhang

.github/workflows/test_matlab_windows.yml

@@ -23,7 +23,7 @@ jobs:
         os: [windows-2022, windows-latest]
         matlab: [R2023a, R2024a, latest]  # The earliest and latest supported versions of MATLAB
         compiler: [intel, mingw]
-        mingw: [8.1, 14.2]
+        mingw: [8.1, 6.4]
         exclude:
           # As of 20260507 and MATLAB R2026a, MEX does not work on windows-latest with Intel
           # compilers due to the version of MS Visual Studio, which is Visual Studio 2026 on
@@ -41,7 +41,7 @@ jobs:
           - compiler: intel
             mingw: 8.1
           - compiler: intel
-            mingw: 14.2
+            mingw: 6.4
 
     steps:
 
@@ -126,7 +126,8 @@ jobs:
         with:
           command: |
             if strcmpi('${{ matrix.compiler }}', 'mingw')
-                setenv('MW_MINGW64_LOC', 'C:\ProgramData\mingw64\mingw64');
+                %setenv('MW_MINGW64_LOC', 'C:\ProgramData\mingw64\mingw64');
+                setenv('MW_MINGW64_LOC', 'C:\ProgramData\chocolatey\lib\mingw\tools\install\mingw64')
                 mex('-setup', '-v', 'fortran');
             end
             root_dir = pwd();