What is the reason that sqlite with icu cannot coexist with intl shared under Windows?

I tried to compile sqlite3 extension with icu for php, but found a comment in ext/pdo_sqlite/config.m4, that is "As long as intl is not shared we can have ICU support". When i tried to compile intl to statical, and found another comment in ext/intl/config.w32, that is "always build as shared - zend_strtod.c/ICU type conflict". I don't know where the conflict is, can this problem be fixed? Is the sqlite extension in php not support icu? Expect any replies, Thank you very much! The snippet in ext/pdo_sqlite/config.m4: if test "$PHP_INTL" = "yes" && test "$PHP_INTL_SHARED" != "yes"; then other_flags="$other_flags -DSQLITE_ENABLE_ICU=1" fi