php7.0 install faild

[BenVim]

./php_protocolbuffers.h:46:10: fatal error: 'ext/standard/php_smart_str.h' file not found

[guanhui07]

In file included from /data/tmp/php-protocolbuffers/protocolbuffers.h:34:0, from /data/tmp/php-protocolbuffers/protocolbuffers.c:32: /data/tmp/php-protocolbuffers/php_protocolbuffers.h:46:40: fatal error: ext/standard/php_smart_str.h: No such file or directory #include "ext/standard/php_smart_str.h" ^ compilation terminated. make: *** [protocolbuffers.lo] Error 1

got the same error