Merge branch 'PHP-7.2'

* PHP-7.2:
  ICU 59+ requires C++11 and errors out without the option
  Fix #76300 - Dont attempt to change visibility of a parent private

Author: smalyshev

ext/intl/config.m4

@@ -18,6 +18,9 @@ if test "$PHP_INTL" != "no"; then
   else
     icu_spoof_src=""
   fi
+  if test "$icu_version" -ge "59000"; then
+  	ICU_CXXFLAGS="$ICU_CXXFLAGS -std=c++11 -stdlib=libc++"
+  fi
   PHP_NEW_EXTENSION(intl, php_intl.c \
     intl_error.c \
     intl_convert.c \