x86_32 non-PCH build still fails:

/pool/buildbot/slaves/sobornost/jdkX-hs/build/src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp: In static member function 'static nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler*, const methodHandle&, int, BasicType*, VMRegPair*, BasicType)':
/pool/buildbot/slaves/sobornost/jdkX-hs/build/src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp:2205:55: error: 'err_msg' was not declared in this scope
     __ block_comment(err_msg("move %d -> %d", i, c_arg));
                                                       ^
The easiest fix is this:

diff -r 5a757c0326c7 src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp
--- a/src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp Thu Mar 29 17:15:26 2018 +0200
+++ b/src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp Thu Mar 29 18:17:58 2018 +0200
@@ -41,6 +41,7 @@
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/vframeArray.hpp"
 #include "utilities/align.hpp"
+#include "utilities/formatBuffer.hpp"
 #include "vm_version_x86.hpp"
 #include "vmreg_x86.inline.hpp"
 #ifdef COMPILER1

But it is baffling why it does not fail the similar build with x86_64!