Add support of the next Ubuntu (Ubuntu 25.10 - Questing Quokka)

Author: sylvestre

clang/include/clang/Driver/Distro.h

@@ -81,6 +81,7 @@ class Distro {
     UbuntuNoble,
     UbuntuOracular,
     UbuntuPlucky,
+    UbuntuQuesting,
     UnknownDistro
   };
 
@@ -132,7 +133,7 @@ class Distro {
   }
 
   bool IsUbuntu() const {
-    return DistroVal >= UbuntuHardy && DistroVal <= UbuntuPlucky;
+    return DistroVal >= UbuntuHardy && DistroVal <= UbuntuQuesting;
   }
 
   bool IsAlpineLinux() const { return DistroVal == AlpineLinux; }

clang/lib/Driver/Distro.cpp

@@ -96,6 +96,7 @@ static Distro::DistroType DetectLsbRelease(llvm::vfs::FileSystem &VFS) {
                     .Case("noble", Distro::UbuntuNoble)
                     .Case("oracular", Distro::UbuntuOracular)
                     .Case("plucky", Distro::UbuntuPlucky)
+                    .Case("questing", Distro::UbuntuQuesting)
                     .Default(Distro::UnknownDistro);
   return Version;
 }