From 96dd72e53112da8ef08490696a4a2569d0ec7c8a Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sun, 23 Feb 2025 20:28:30 +0000
Subject: [PATCH] llvmPackages_{12..18}.tblgen: backport `gcc-15` fix (add
 `<cstdint>`)

---
 pkgs/development/compilers/llvm/common/default.nix | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/pkgs/development/compilers/llvm/common/default.nix b/pkgs/development/compilers/llvm/common/default.nix
index 42a6c950a39c..8fdf98d2c9de 100644
--- a/pkgs/development/compilers/llvm/common/default.nix
+++ b/pkgs/development/compilers/llvm/common/default.nix
@@ -427,6 +427,18 @@ let
                   stripLen = 1;
                 }
               )
+          ++
+            lib.optional
+              (lib.versionAtLeast metadata.release_version "12" && lib.versionOlder metadata.release_version "19")
+              # Add missing include headers to build against gcc-15:
+              #   https://github.com/llvm/llvm-project/pull/101761
+              (
+                fetchpatch {
+                  url = "https://github.com/llvm/llvm-project/commit/7e44305041d96b064c197216b931ae3917a34ac1.patch";
+                  hash = "sha256-1htuzsaPHbYgravGc1vrR8sqpQ/NSQ8PUZeAU8ucCFk=";
+                  stripLen = 1;
+                }
+              )
           ++
             lib.optional (lib.versionOlder metadata.release_version "16")
               # Fix musl build.