Build error - PHP_5_6 (2018-11-28)

>>> File: ext/intl/intl_convertcpp.h Function: (top level):28 [og] ('UnicodeString' was not declared in this scope) Function: (top level):28 [og] ('ret' was not declared in this scope) Function: (top level):28 [og] (expected primary-expression before 'char') Function: (top level):28 [og] (expected primary-expression before 'str_len') Function: (top level):28 [og] (expected primary-expression before '*' token) Function: (top level):28 [og] ('status' was not declared in this scope) Function: (top level):28 [og] (expression list treated as compound expression in initializer [-fpermissive]) Function: (top level):30 [og] ('UnicodeString' does not name a type; did you mean 'gdImageString'?) >>> File: ext/intl/intl_convertcpp.cpp Function: (top level):28 [og] (redefinition of 'int intl_stringFromChar') Function: (top level):28 [og] ('UnicodeString' was not declared in this scope) Function: (top level):28 [og] ('ret' was not declared in this scope) Function: (top level):28 [og] (expected primary-expression before 'char') Function: (top level):28 [og] (expected primary-expression before 'str_len') Function: (top level):28 [og] (expected primary-expression before '*' token) Function: (top level):28 [og] ('status' was not declared in this scope) Function: (top level):54 [og] ('UnicodeString' does not name a type; did you mean 'OnUpdateString'?) Function: (top level):56 [og] (request for member 'isBogus' in 'from', which is of non-class type 'const int') Function: (top level):62 [og] (request for member 'length' in 'from', which is of non-class type 'const int') Function: (top level):64 [og] (request for member 'isEmpty' in 'from', which is of non-class type 'const int') Function: (top level):74 [og] (request for member 'getBuffer' in 'from', which is of non-class type 'const int') Function: (top level):76 [og] (request for member 'length' in 'from', which is of non-class type 'const int')