Build failure on latest ubuntu

[Emoun]

We get the following build failure on Ubuntu 24:

[100%] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/TargetRegistry.cpp.o
In file included from /home/runner/work/patmos-llvm-project/patmos-llvm-project/llvm/lib/Support/Signals.cpp:14:
/home/runner/work/patmos-llvm-project/patmos-llvm-project/llvm/include/llvm/Support/Signals.h:119:8: error: variable or field ‘CleanupOnSignal’ declared void
  119 |   void CleanupOnSignal(uintptr_t Context);
      |        ^~~~~~~~~~~~~~~
/home/runner/work/patmos-llvm-project/patmos-llvm-project/llvm/include/llvm/Support/Signals.h:119:24: error: ‘uintptr_t’ was not declared in this scope
  119 |   void CleanupOnSignal(uintptr_t Context);
      |                        ^~~~~~~~~
/home/runner/work/patmos-llvm-project/patmos-llvm-project/llvm/include/llvm/Support/Signals.h:18:1: note: ‘uintptr_t’ is defined in header ‘<cstdint>’; did you forget to ‘#include <cstdint>’?
   17 | #include <string>
  +++ |+#include <cstdint>
   18 | 
[100%] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ThreadLocal.cpp.o
In file included from /home/runner/work/patmos-llvm-project/patmos-llvm-project/llvm/lib/Support/Signals.cpp:225:
/home/runner/work/patmos-llvm-project/patmos-llvm-project/llvm/lib/Support/Unix/Signals.inc:348:44: error: ‘void llvm::sys::CleanupOnSignal(uintptr_t)’ should have been declared inside ‘llvm::sys’
  348 | void sys::CleanupOnSignal(uintptr_t Context) {
      |                                            ^
make[3]: *** [lib/Support/CMakeFiles/LLVMSupport.dir/build.make:1882: lib/Support/CMakeFiles/LLVMSupport.dir/Signals.cpp.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [CMakeFiles/Makefile2:9539: lib/Support/CMakeFiles/LLVMSupport.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:16904: utils/FileCheck/CMakeFiles/FileCheck.dir/rule] Error 2
make: *** [Makefile:3621: FileCheck] Error 2

This seems to me to have already been fixed in upstream LLVM, so the solution is to upgrade. See here and here.