llvmPackages_{7-12} stdenvs: link all resource files from compiler-rt

Likely due to an oversight, after 7869d16
some of the resource files of compiler-rt are installed to $dev/include
instead of $out/share which breaks the assumption of multiple cc
wrappers in llvmPackages. To resolve this without causing a mass rebuild
on darwin, link the files from the wrong location into the correct place
in clang's resource root.

The proper fix for this is NixOS#123103 which however causes a darwin stdenv
rebuild and should go through staging first.

pkgs/development/compilers/llvm/10/default.nix

@@ -26,7 +26,9 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
+      mkdir -p "$rsrc/share"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share/"* "$rsrc/share/"
+      ln -s "${targetLlvmLibraries.compiler-rt.dev}/include/"*.txt "$rsrc/share/"
     '';
 
   in {

pkgs/development/compilers/llvm/11/default.nix

@@ -28,7 +28,9 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
+      mkdir -p "$rsrc/share"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share/"* "$rsrc/share/"
+      ln -s "${targetLlvmLibraries.compiler-rt.dev}/include/"*.txt "$rsrc/share/"
     '';
 
   in {

pkgs/development/compilers/llvm/12/default.nix

@@ -35,7 +35,9 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
+      mkdir -p "$rsrc/share"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share/"* "$rsrc/share/"
+      ln -s "${targetLlvmLibraries.compiler-rt.dev}/include/"*.txt "$rsrc/share/"
     '';
 
   in {

pkgs/development/compilers/llvm/7/default.nix

@@ -26,6 +26,9 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+      mkdir -p "$rsrc/share"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share/"* "$rsrc/share/"
+      ln -s "${targetLlvmLibraries.compiler-rt.dev}/include/"*.txt "$rsrc/share/"
     '';
 
   in {

pkgs/development/compilers/llvm/8/default.nix

@@ -26,6 +26,9 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+      mkdir -p "$rsrc/share"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share/"* "$rsrc/share/"
+      ln -s "${targetLlvmLibraries.compiler-rt.dev}/include/"*.txt "$rsrc/share/"
     '';
 
   in {

pkgs/development/compilers/llvm/9/default.nix

@@ -26,6 +26,9 @@ let
     '';
     mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+      mkdir -p "$rsrc/share"
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/share/"* "$rsrc/share/"
+      ln -s "${targetLlvmLibraries.compiler-rt.dev}/include/"*.txt "$rsrc/share/"
     '';
 
   in {