only build create_symlink when needed

Author: scivision

+stdlib/cpu_arch.m

@@ -5,6 +5,7 @@
 
 if stdlib.has_dotnet()
   a = System.Runtime.InteropServices.RuntimeInformation.OSArchitecture;
+  % https://learn.microsoft.com/en-us/dotnet/core/compatibility/interop/7.0/osarchitecture-emulation
 else
   a = javaMethod("getProperty", "java.lang.System", "os.arch");
 end

+stdlib/create_symlink.m

@@ -26,10 +26,12 @@
     % Matlab Java doesn't recognize the optional argument omitted.
     % see example/Filesystem.java for this working in plain Java.
     % see example/javaCreateSymbolicLink.m for a non-working attempt in Matlab.
-      if stdlib.has_dotnet()
+      if stdlib.has_dotnet() && stdlib.dotnet_api() >= 6
+        % https://learn.microsoft.com/en-us/dotnet/api/system.io.file.createsymboliclink
         System.IO.File.CreateSymbolicLink(link, target);
         ok = true;
       else
+        warning(e.identifier, "%s", e.message)
         ok = false;
       end
     case "Octave:undefined-function"

+stdlib/disk_available.m

@@ -15,6 +15,7 @@
 
 if stdlib.has_dotnet()
   f = System.IO.DriveInfo(stdlib.absolute(d)).AvailableFreeSpace();
+  % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.availablefreespace
 elseif stdlib.has_java()
   f = javaObject("java.io.File", d).getUsableSpace();
   f = uint64(f);

+stdlib/disk_capacity.m

@@ -13,6 +13,7 @@
 
 if stdlib.has_dotnet()
   f = System.IO.DriveInfo(stdlib.absolute(d)).TotalSize();
+  % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.totalsize
 elseif stdlib.has_java()
   f = javaObject("java.io.File", d).getTotalSpace();
   f = uint64(f);

+stdlib/filesystem_type.m

@@ -13,6 +13,7 @@
 
 if stdlib.has_dotnet()
   t = System.IO.DriveInfo(stdlib.absolute(p)).DriveFormat;
+  % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.driveformat
 elseif stdlib.has_java()
   t = javaMethod("getFileStore", "java.nio.file.Files", javaPathObject(p)).type;
 end

+stdlib/get_username.m

@@ -7,6 +7,7 @@
 
 if stdlib.has_dotnet()
   n = System.Environment.UserName;
+  % https://learn.microsoft.com/en-us/dotnet/api/system.environment.username
 elseif stdlib.has_java()
   n = javaMethod("getProperty", "java.lang.System", "user.name");
 end

+stdlib/hostname.m

@@ -10,6 +10,7 @@
 
 if stdlib.has_dotnet()
   n = System.Environment.MachineName;
+  % https://learn.microsoft.com/en-us/dotnet/api/system.environment.machinename
 elseif stdlib.isoctave()
   n = gethostname();
 elseif stdlib.has_java()

+stdlib/os_version.m

@@ -9,6 +9,7 @@
 
 if stdlib.has_dotnet()
   v = System.Environment.OSVersion.VersionString;
+  % https://learn.microsoft.com/en-us/dotnet/api/system.operatingsystem.versionstring
   vs = split(string(v), ' ');
   version = vs(end);
   os = join(vs(1:end-1));

buildfile.m

@@ -284,8 +284,8 @@ function build_exe(context)
 srcs{end+1} = ["src/read_symlink.cpp", win, sym];
 end
 
-if isMATLABReleaseOlderThan("R2024b") || build_all || ispc
-% so that we dont't need to run matlab AsAdmin on Windows
+if (isMATLABReleaseOlderThan("R2024b") && ~stdlib.has_dotnet() || stdlib.dotnet_api() < 6) || build_all
+% so that we don't need to run matlab AsAdmin on Windows
 srcs{end+1} = ["src/create_symlink.cpp", win, sym];
 end