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在使用 configure 配置过程中报的错误。

$ ./configure --prefix=/usr/local/php7/ --enable-debug --enable-maintainer-zts --enable-mysqlnd --with-mysqli --with-openssl --enable-pcntl --enable-mbstring --with-curl --enable-fpm

问题一、 openssl问题

和openssl有关(当然，系统中已经安装了openssl)。报如下的错误：

checking for ..../pkg-config
error: Cannot find OpenSSL's <evp.h>

解决方法，

For compilers to find libressl you may need to set:
  export LDFLAGS="-L/usr/local/opt/libressl/lib"
  export CPPFLAGS="-I/usr/local/opt/libressl/include"

For pkg-config to find libressl you may need to set:
  export PKG_CONFIG_PATH="/usr/local/opt/libressl/lib/pkgconfig"

问题二、 iconv问题

问题一解决之后，新的问题又来了。

error: Please specify the install prefix of iconv with --with-iconv=<DIR>

解决方法

$ brew install libiconv

先安装libiconv，然后在configure中指定--with-iconv 选项。如下

$ ./configure --prefix=/usr/local/php7/ --enable-debug --enable-maintainer-zts --enable-mysqlnd --with-mysqli --with-openssl --enable-pcntl --enable-mbstring --with-curl --enable-fpm --with-iconv=$(brew --prefix libiconv)

make 过程报错

SHLIB_DL_SUFFIX_NAME = so
"Makefile" 1713L, 277679C
      _php_iconv_string in iconv.o
      __php_iconv_strlen in iconv.o
      __php_iconv_substr in iconv.o
      __php_iconv_strpos in iconv.o
      __php_iconv_mime_encode in iconv.o
      __php_iconv_mime_decode in iconv.o
      _php_iconv_stream_filter_dtor in iconv.o
      ...
  "_libiconv_open", referenced from:
      _php_iconv_string in iconv.o
      __php_iconv_strlen in iconv.o
      __php_iconv_substr in iconv.o
      __php_iconv_strpos in iconv.o
      __php_iconv_mime_encode in iconv.o
      __php_iconv_mime_decode in iconv.o
      _php_iconv_stream_filter_ctor 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)

解决办法： 编辑 Makefile 找到 EXTRA_LIBS = 。。。 将 -liconv 替换成 /usr/local/Cellar/libiconv/1.16/lib/libiconv.dylib
可以根据自己系统的实际路径替换