UX feedback [skip ci]

Author: scivision

.github/workflows/ci.yml

@@ -27,11 +27,13 @@ jobs:
       matrix:
         os: [ubuntu-22.04]
         release: [R2022a, R2022b, R2023a, R2023b, R2024a, R2024b, R2025a]
+# on Linux, even R2025a needs GCC 10.x and hence Github Actions runner ubuntu-22.04
         include:
         - os: macos-latest
           release: R2025a
         - os: macos-latest
           release: R2023b
+# macOS R2023b to be compatible with Xcode version on Github Actions runner
         - os: windows-latest
           release: R2025a
         - os: windows-latest

buildfile.m

@@ -140,6 +140,9 @@ function build_exe(context)
       comp = getenv("FC");
       if isempty(comp)
         disp("set FC environment variable to the Fortran compiler path, or do 'mex -setup fortran'")
+        if ismac()
+          disp("on macOS, environment variables propagate in to GUI programs like Matlab by using 'launchctl setenv FC' and a reboot. Or by using 'FC=gfortran matlab -batch buildtool exe'")
+        end
       end
     case "c++"
       comp = getenv("CXX");