我把一台 Mac 升级到了 macOS 10.12.0 Sierra，并试图将 PHP 升级到7.0.9版本，但是在“make test”过程中出现了错误：
Undefined symbols for architecture x86_64:
"_libiconv", referenced from:
_zif_iconv_substr in iconv.o
_zif_iconv_mime_encode in iconv.o
_php_iconv_string in iconv.o
__php_iconv_strlen in iconv.o
__php_iconv_strpos in iconv.o
__php_iconv_appendl in iconv.o
_php_iconv_stream_filter_append_bucket in iconv.o
...
"_libiconv_close", referenced from:
_zif_iconv_substr in iconv.o
_zif_iconv_mime_encode in iconv.o
_php_iconv_string in iconv.o
__php_iconv_strlen in iconv.o
__php_iconv_strpos in iconv.o
__php_iconv_mime_decode in iconv.o
_php_iconv_stream_filter_factory_create in iconv.o
...
"_libiconv_open", referenced from:
_zif_iconv_substr in iconv.o
_zif_iconv_mime_encode in iconv.o
_php_iconv_string in iconv.o
__php_iconv_strlen in iconv.o
__php_iconv_strpos in iconv.o
__php_iconv_mime_decode in iconv.o
_php_iconv_stream_filter_factory_create in iconv.o
...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [libs/libphp7.bundle] Error 1
./configure --prefix=/usr/local/php5 --mandir=/usr/share/man --infodir=/usr/share/info --sysconfdir=/etc --with-config-file-path=/etc --with-zlib --with-zlib-dir=/usr --with-openssl=/usr/local --enable-exif --enable-ftp --enable-mbstring --enable-mbregex --enable-sockets --with-pdo-mysql=mysqlnd --with-mysqli=mysqlnd --with-apxs2=/usr/local/apache2/bin/apxs --enable-zip --with-curl
我尝试添加不同的'--with-iconv-dir='选项，但总是出现相同的未定义符号错误。
我已经下载并编译了libiconv，但没有效果。甚至使用以下配置进行编译：
CFLAGS='-arch x86_64' CCFLAGS='-arch x86_64' CXXFLAGS='-arch x86_64' ./configure
但这没有任何区别。有什么建议吗？
非常感谢您的帮助。