1 files changed, 7 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/llvm/13/clang/default.nix b/nixpkgs/pkgs/development/compilers/llvm/13/clang/default.nix
index 78c2831a2f35..ab826fa31526 100644
--- a/nixpkgs/pkgs/development/compilers/llvm/13/clang/default.nix
+++ b/nixpkgs/pkgs/development/compilers/llvm/13/clang/default.nix
@@ -37,6 +37,11 @@ let
       ./purity.patch
       # https://reviews.llvm.org/D51899
       ./gnu-install-dirs.patch
+      # Revert of https://reviews.llvm.org/D100879
+      # The malloc alignment assumption is incorrect for jemalloc and causes
+      # mis-compilation in firefox.
+      # See: https://bugzilla.mozilla.org/show_bug.cgi?id=1741454
+      ./revert-malloc-alignment-assumption.patch
       (substituteAll {
         src = ../../clang-11-12-LLVMgold-path.patch;
         libllvmLibdir = "${libllvm.lib}/lib";
@@ -44,6 +49,8 @@ let
     ];
 
     postPatch = ''
+      (cd tools && ln -s ../../clang-tools-extra extra)
+
       sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' \
              -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' \
              lib/Driver/ToolChains/*.cpp