don't build unneeded mex files

Author: scivision

+stdlib/is_admin.m

@@ -3,9 +3,10 @@
 
 function y = is_admin()
 
+
 if stdlib.isoctave()
   y = getuid() == 0;
-elseif ispc()
+elseif ispc() && stdlib.has_dotnet()
   % com.sun.security.auth.module.NTSystem().getGroupIDs();
   % Administrator group SID (S-1-5-32-544) is not an appropriate check .getGroupIDs because it
   % only tells if a user is *allowed* to run as admin, not if they are currently running as admin.
@@ -14,11 +15,15 @@
   identity = System.Security.Principal.WindowsIdentity.GetCurrent();
   principal = System.Security.Principal.WindowsPrincipal(identity);
   y = principal.IsInRole(System.Security.Principal.WindowsBuiltInRole.Administrator);
-elseif stdlib.has_java()
-  y = com.sun.security.auth.module.UnixSystem().getUid() == 0;
+elseif isunix()
+  if stdlib.has_java()
+    y = com.sun.security.auth.module.UnixSystem().getUid() == 0;
+  else
+    [s, r] = system('id -u');
+    y = s == 0 && strip(r) == "0";
+  end
 else
-  [s, r] = system('id -u');
-  y = s == 0 && strip(r) == "0";
+  error("stdlib:is_admin:UnsupportedPlatform", "is_admin() is not supported on this platform")
 end
 
 end

+stdlib/is_rosetta.m

@@ -1,5 +1,4 @@
 %% IS_ROSETTA on Apple Silicon via Rosetta
-% optional: mex
 %
 % true if Matlab on Apple Silicon CPU is built for Intel x86_64
 

+stdlib/is_wsl.m

@@ -1,5 +1,4 @@
 %% IS_WSL detect if running under WSL
-% optional: mex
 %
 % Detects if Matlab or GNU Octave is installed and running from within
 % Windows Subsystem for Linux

buildfile.m

@@ -257,8 +257,6 @@ function build_exe(context)
 
 win = [pure, "src/windows.cpp"];
 
-mac = "src/macos.cpp";
-
 sym = "src/symlink_fs.cpp";
 
 
@@ -272,8 +270,6 @@ function build_exe(context)
 "src/disk_available.cpp", ...
 "src/disk_capacity.cpp", ...
 "src/set_permissions.cpp", ...
-["src/is_rosetta.cpp", mac], ...
-["src/drop_slash.cpp", normal], ...
 };
 
 if (isMATLABReleaseOlderThan("R2024b") && ~stdlib.has_dotnet()) || build_all