diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..f371bbfd
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,41 @@
+.ci
+.clang-format
+.clang-tidy
+.git
+.git-blame-ignore-revs
+.gitattributes
+.github
+.mailmap
+
+CODE_OF_CONDUCT.md
+CONTRIBUTING.md
+LICENSE.TXT
+README.md
+SECURITY.md
+pyproject.toml
+
+bolt
+clang
+clang-tools-extra
+cmake
+compiler-rt
+cross-project-tests
+flang
+integration-test-suite
+libc
+libclc
+libcxx
+libcxxabi
+libunwind
+lld
+lldb
+llvm
+llvm-libgcc
+mlir
+offload
+openmp
+polly
+pstl
+runtimes
+third-party
+utils
diff --git a/debian/changelog b/debian/changelog
index 11449a1e..fe12014e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+llvm-toolchain-19 (1:19.1.0~++rc3-1~exp2) UNRELEASED; urgency=medium
+
+  * Add a .gitignore file with all toplevel upstream files and directories.
+
+ -- Matthias Klose <doko@ubuntu.com>  Tue, 27 Aug 2024 11:47:25 +0200
+
 llvm-toolchain-19 (1:19.1.0~++rc3-1~exp1) experimental; urgency=medium
 
   [ Matthias Klose ]