pegtl: apply upstream workaround for gcc 16 bug (#538862)

pkgs/by-name/pe/pegtl/package.nix

@@ -18,6 +18,20 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-nPWSO2wPl/qenUQgvQDQu7Oy1dKa/PnNFSclmkaoM8A=";
   };
 
+  # GCC 16.1.0 has a bug with `__PRETTY_FUNCTION__` that leads to static
+  # assertions in PEGTL failing. Upstream has enabled a workaround for GCC 16
+  # specifically instead, and the bug was fixed for GCC 17+. The upstream patch
+  # does not apply cleanly since the codebase has changed substantially since
+  # v3.2.8, but it's trivial to apply a similar trick on our own.
+  # https://github.com/taocpp/PEGTL/issues/382
+  # https://github.com/taocpp/PEGTL/commit/0176e87da3a02d0ab40ce39f03e0e4108d1bbba5
+  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91155
+  postPatch = ''
+    substituteInPlace include/tao/pegtl/demangle.hpp --replace-fail \
+      "#elif( __GNUC__ == 9 ) && ( __GNUC_MINOR__ < 3 )" \
+      "#elif ( ( __GNUC__ == 9 ) && ( __GNUC_MINOR__ < 3 ) ) || ( __GNUC__ == 16 )"
+  '';
+
   nativeBuildInputs = [
     cmake
     ninja