Errors when I install stringi

[dailing57]

Here are some Error messages I get when I install stringi:
run:
USE_LOCAL -UDEBUG -DNDEBUG -DU_HAVE_ELF_H -I/usr/local/include -fpic -fpic -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -c icu69/common/uarrsort.cpp -o icu69/common/uarrsort.o
errors:
icu69/common/uarrsort.cpp: In function ‘constexpr int32_t sizeInMaxAlignTs(int32_t)’: icu69/common/uarrsort.cpp:40:34: error: ‘max_align_t’ is not a member of ‘std’ return (sizeInBytes + sizeof(std::max_align_t) - 1) / sizeof(std::max_align_t);
icu69/common/uarrsort.cpp:144:77: error: template argument 1 is invalid icu::MaybeStackArray<std::max_align_t, sizeInMaxAlignTs(STACK_ITEM_SIZE)> v;
icu69/common/uarrsort.cpp:145:40: error: request for member ‘getCapacity’ in ‘v’, which is of non-class type ‘int’ if (sizeInMaxAlignTs(itemSize) > v.getCapacity() &&

[dailing57]

I've found out why I'm wrong.I'm using the old version of gcc so that the max_align_t is not in the std.

[gagolews]

Duplicate of #431