diff --git a/debian/patches/compilerrt-fix-warn-xray-testing.diff b/debian/patches/compilerrt-fix-warn-xray-testing.diff
index 645e7f88..38babc96 100644
--- a/debian/patches/compilerrt-fix-warn-xray-testing.diff
+++ b/debian/patches/compilerrt-fix-warn-xray-testing.diff
@@ -1,3 +1,4 @@
+suppress warnings for xray and testing when not enabled
 Index: llvm-toolchain-12_12.0.1/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
 ===================================================================
 --- llvm-toolchain-12_12.0.1.orig/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
diff --git a/debian/patches/libclc-fix-prepare_builtins-rpath.diff b/debian/patches/libclc-fix-prepare_builtins-rpath.diff
index ac88169a..c1f87571 100644
--- a/debian/patches/libclc-fix-prepare_builtins-rpath.diff
+++ b/debian/patches/libclc-fix-prepare_builtins-rpath.diff
@@ -1,3 +1,5 @@
+set rpath for prepare_builtins build utility to find correct stage2
+libs at runtime when executed as part of a build
 Index: llvm-toolchain-12_12.0.1/libclc/CMakeLists.txt
 ===================================================================
 --- llvm-toolchain-12_12.0.1.orig/libclc/CMakeLists.txt
diff --git a/debian/patches/libcxx-libatomic-only-with-gcc-rtlib.diff b/debian/patches/libcxx-libatomic-only-with-gcc-rtlib.diff
index f91624df..41662966 100644
--- a/debian/patches/libcxx-libatomic-only-with-gcc-rtlib.diff
+++ b/debian/patches/libcxx-libatomic-only-with-gcc-rtlib.diff
@@ -1,3 +1,4 @@
+if libatomic is found only link it if libgcc is the rtlib
 Index: llvm-toolchain-12_12.0.1/libcxx/CMakeLists.txt
 ===================================================================
 --- llvm-toolchain-12_12.0.1.orig/libcxx/CMakeLists.txt
diff --git a/debian/patches/llvm-fix-lld-linker-check.diff b/debian/patches/llvm-fix-lld-linker-check.diff
index ee006e1d..bad28992 100644
--- a/debian/patches/llvm-fix-lld-linker-check.diff
+++ b/debian/patches/llvm-fix-lld-linker-check.diff
@@ -1,3 +1,5 @@
+remove regex anchor in lld linker detection to account for vendor, if
+specified, being prepended to lld version string
 Index: llvm-toolchain-12_12.0.1/llvm/cmake/modules/AddLLVM.cmake
 ===================================================================
 --- llvm-toolchain-12_12.0.1.orig/llvm/cmake/modules/AddLLVM.cmake
diff --git a/debian/patches/openmp-fix-runtimes-build.diff b/debian/patches/openmp-fix-runtimes-build.diff
index 45499bbf..b8d20cd0 100644
--- a/debian/patches/openmp-fix-runtimes-build.diff
+++ b/debian/patches/openmp-fix-runtimes-build.diff
@@ -1,3 +1,6 @@
+include required runtimes as dependencies to openmp targets to make sure
+they are built first when included as part of a runtimes build since openmp
+can depend on them
 Index: llvm-toolchain-12_12.0.1/llvm/runtimes/CMakeLists.txt
 ===================================================================
 --- llvm-toolchain-12_12.0.1.orig/llvm/runtimes/CMakeLists.txt