clang: error: linker command failed with exit code 1 (use -v to see invocation)ld: symbol(s) not found for architecture x86_64make: *** [sapi/fpm/php-fpm] Error 1clang: error: linker command failed with exit code 1 (use -v to see invocation)make: *** [libs/libphp5.bundle] Error 1

解决办法：

brew install libxml2brew link libxml2 --force