ZGC fails to build on GCC 4.4.7: Type parameter issue

When trying to build jdk/jdk on CentOS/RHEL 6 which has GCC version 4.4.7 one gets this compile error after JDK-8220283:

/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.cpp: In constructor ‘ZStatSampler::ZStatSampler(const char*, const char*, void (*)(LogTargetHandle, const ZStatSampler&, const ZStatSamplerHistory&))’:
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.cpp:407: error: class ‘ZStatSampler’ does not have any field named ‘ZStatIterableValue’
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.cpp:408: error: no matching function for call to ‘ZStatIterableValue<ZStatSampler>::ZStatIterableValue()’
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.hpp:95: note: candidates are: ZStatIterableValue<T>::ZStatIterableValue(const char*, const char*, uint32_t) [with T = ZStatSampler]
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.hpp:85: note: ZStatIterableValue<ZStatSampler>::ZStatIterableValue(const ZStatIterableValue<ZStatSampler>&)
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.cpp: In constructor ‘ZStatCounter::ZStatCounter(const char*, const char*, void (*)(LogTargetHandle, const ZStatSampler&, const ZStatSamplerHistory&))’:
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.cpp:443: error: class ‘ZStatCounter’ does not have any field named ‘ZStatIterableValue’
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.cpp:444: error: no matching function for call to ‘ZStatIterableValue<ZStatCounter>::ZStatIterableValue()’
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.hpp:95: note: candidates are: ZStatIterableValue<T>::ZStatIterableValue(const char*, const char*, uint32_t) [with T = ZStatCounter]
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.hpp:85: note: ZStatIterableValue<ZStatCounter>::ZStatIterableValue(const ZStatIterableValue<ZStatCounter>&)
/home/openjdk/openjdk-head/src/hotspot/share/gc/z/zStat.cpp: In constructor ‘ZStatUnsampledCounter::ZStatUnsampledCounter(const char*)’: