[libc++] Upgrade to GCC 14 (#97205)

Author: philnik777

.github/workflows/libcxx-build-and-test.yaml

@@ -63,8 +63,8 @@ jobs:
         cxx: [ 'clang++-19' ]
         include:
           - config: 'generic-gcc'
-            cc: 'gcc-13'
-            cxx: 'g++-13'
+            cc: 'gcc-14'
+            cxx: 'g++-14'
     steps:
       - uses: actions/checkout@v4
       - name: ${{ matrix.config }}.${{ matrix.cxx }}
@@ -101,8 +101,8 @@ jobs:
         cxx: [ 'clang++-19' ]
         include:
           - config: 'generic-gcc-cxx11'
-            cc: 'gcc-13'
-            cxx: 'g++-13'
+            cc: 'gcc-14'
+            cxx: 'g++-14'
           - config: 'generic-cxx23'
             cc: 'clang-17'
             cxx: 'clang++-17'

libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp

@@ -158,6 +158,11 @@ void framework_self_test() {
 template <typename T> class UncompressibleAllocator : public std::allocator<T> {
  public:
   char X;
+
+  template <class U>
+  struct rebind {
+    using other = UncompressibleAllocator<U>;
+  };
 };
 
 void string_test() {

libcxx/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/PR31384.pass.cpp

@@ -9,7 +9,7 @@
 // UNSUPPORTED: c++03
 
 // FIXME: Why does this start to fail with GCC 14?
-// XFAIL: gcc-14
+// XFAIL: !(c++11 || c++14) && gcc-14
 
 // See https://llvm.org/PR31384.