diff --git a/docs/markdown/snippets/update_xc32_for_v5.md b/docs/markdown/snippets/update_xc32_for_v5.md
new file mode 100644
index 000000000000..1263948191d2
--- /dev/null
+++ b/docs/markdown/snippets/update_xc32_for_v5.md
@@ -0,0 +1,4 @@
+## XC32 support now aware of v5.00 features
+
+XC32 features introduced in v5.00 can now be used. This includes
+support for LTO auto and the C2x and CPP23 standards.
diff --git a/mesonbuild/compilers/mixins/microchip.py b/mesonbuild/compilers/mixins/microchip.py
index 29fe0c5f18c6..b21b032c31a8 100644
--- a/mesonbuild/compilers/mixins/microchip.py
+++ b/mesonbuild/compilers/mixins/microchip.py
@@ -122,14 +122,15 @@ class Xc32Compiler(CompilerBase):
 
     gcc_version = '4.5.1'  # Defaults to GCC version used by first XC32 release (v1.00).
 
-    _COLOR_VERSION = ">=3.0"       # XC32 version based on GCC 8.3.1+
-    _WPEDANTIC_VERSION = ">=1.40"  # XC32 version based on GCC 4.8.3+
-    _LTO_AUTO_VERSION = "==-1"
-    _USE_MOLD_VERSION = "==-1"
+    _COLOR_VERSION = '>=3.0'       # XC32 version based on GCC 8.3.1+
+    _WPEDANTIC_VERSION = '>=1.40'  # XC32 version based on GCC 4.8.3+
+    _LTO_AUTO_VERSION = '>=5.00'   # XC32 version based on GCC 13.2.1+
+    _LTO_CACHE_VERSION = '==-1'
+    _USE_MOLD_VERSION = '==-1'
 
     def __init__(self) -> None:
         if not self.is_cross:
-            raise EnvironmentException("XC32 supports only cross-compilation.")
+            raise EnvironmentException('XC32 supports only cross-compilation.')
 
     def get_instruction_set_args(self, instruction_set: str) -> T.Optional[T.List[str]]:
         return None
@@ -182,14 +183,14 @@ class Xc32CStds(GnuCStds):
 
     """Mixin for setting C standards based on XC32 version."""
 
-    _C18_VERSION = ">=3.0"
-    _C2X_VERSION = "==-1"
-    _C23_VERSION = "==-1"
-    _C2Y_VERSION = "==-1"
+    _C18_VERSION = '>=3.0'
+    _C2X_VERSION = '>=5.00'
+    _C23_VERSION = '==-1'
+    _C2Y_VERSION = '==-1'
 
 class Xc32CPPStds(GnuCPPStds):
 
     """Mixin for setting C++ standards based on XC32 version."""
 
-    _CPP23_VERSION = "==-1"
-    _CPP26_VERSION = "==-1"
+    _CPP23_VERSION = '>=5.00'
+    _CPP26_VERSION = '==-1'