GCC 4.8.5 on rhel6:
```
utext.cpp:572:5: error: 'max_align_t' in namespace 'std' does not name a
type
std::max_align_t extension;
^
utext.cpp: In function 'UText* utext_setup_67(UText*, int32_t,
UErrorCode*)':
utext.cpp:587:73: error: 'max_align_t' is not a member of 'std'
spaceRequired = sizeof(ExtendedUText) + extraSpace -
sizeof(std::max_align_t);
^
utext.cpp:587:73: note: suggested alternative:
In file included from
/projects/spack/opt/spack/gcc-4.4.7/gcc/6ln2t7b/include/c++/4.8.5/cstddef:42:0,
from utext.cpp:19:
/projects/spack/opt/spack/gcc-4.4.7/gcc/6ln2t7b/lib/gcc/x86_64-unknown-linux-gnu/4.8.5/include/stddef.h:
425:3: note: 'max_align_t'
} max_align_t;
^
utext.cpp:598:57: error: 'struct ExtendedUText' has no member named
'extension'
ut->pExtra = &((ExtendedUText *)ut)->extension;
^
g++ ... loadednormalizer2impl.cpp
g++ ... chariter.cpp
```
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