Compiling Hotspot without only C2 fails, i.e.

./configure --with-jvm-features=-compiler2

fails with:

* For target hotspot_variant-server_libjvm_objs_deoptimization.o:
/home/tschatzl/Downloads/vmshare/jdk10/hs/open/src/hotspot/share/runtime/deoptimization.cpp: In static member function 'static Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread*, int)':
/home/tschatzl/Downloads/vmshare/jdk10/hs/open/src/hotspot/share/runtime/deoptimization.cpp:305:25: error: 'DoEscapeAnalysis' was not declared in this scope
   if (jvmci_enabled || (DoEscapeAnalysis && EliminateAllocations)) {
                         ^
/home/tschatzl/Downloads/vmshare/jdk10/hs/open/src/hotspot/share/runtime/deoptimization.cpp:305:45: error: 'EliminateAllocations' was not declared in this scope
   if (jvmci_enabled || (DoEscapeAnalysis && EliminateAllocations)) {
                                             ^
/home/tschatzl/Downloads/vmshare/jdk10/hs/open/src/hotspot/share/runtime/deoptimization.cpp:321:26: error: 'DoEscapeAnalysis' was not declared in this scope
   if (jvmci_enabled || ((DoEscapeAnalysis || EliminateNestedLocks) && EliminateLocks)) {
                          ^
/home/tschatzl/Downloads/vmshare/jdk10/hs/open/src/hotspot/share/runtime/deoptimization.cpp:321:46: error: 'EliminateNestedLocks' was not declared in this scope
   if (jvmci_enabled || ((DoEscapeAnalysis || EliminateNestedLocks) && EliminateLocks)) {
                                              ^
/home/tschatzl/Downloads/vmshare/jdk10/hs/open/src/hotspot/share/runtime/deoptimization.cpp:321:71: error: 'EliminateLocks' was not declared in this scope
   if (jvmci_enabled || ((DoEscapeAnalysis || EliminateNestedLocks) && EliminateLocks)) {
   ... (rest of output omitted)

It works again when disabling both C2 and JVMCI.

Not sure if only leaving out C2 is a supported configuration, but should probably error out in the configure step if it isn't.