如何使用自定义OpenSSL编译Python 3.4？

我在非标准位置安装了自己的OpenSSL(/my/path为了这个例子),我希望Python 3.4能够针对源代码编译它.我试过的是这个(目录缩写)

CPPFLAGS="-I/my/path/include -I/my/path/include/openssl" ./configure --prefix=/my/path/

我也试过C_INCLUDE_PATH和冒号分开的路径.

然后,我跑了make,得到这个:

building '_ssl' extension
gcc -pthread -fPIC -fno-strict-aliasing -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I./Include -I. -IInclude -I/my/path/include -I/my/path/include/openssl -I/usr/local/include -I/my/path/Python-3.4.0/Include -I/my/path/Python-3.4.0 -c /my/path/Python-3.4.0/Modules/_ssl.c -o build/temp.linux-x86_64-3.4/my/path/Python-3.4.0/Modules/_ssl.o
gcc -pthread -shared build/temp.linux-x86_64-3.4/my/path/Python-3.4.0/Modules/_ssl.o -L/my/path/lib -L/usr/local/lib -lssl -lcrypto -o build/lib.linux-x86_64-3.4/_ssl.cpython-34m.so
*** WARNING: renaming "_ssl" since importing it failed: build/lib.linux-x86_64-3.4/_ssl.cpython-34m.so: undefined symbol: SSL_get0_next_proto_negotiated

它正在寻找SSL_get0_next_proto_negotiated,但这肯定是定义的:

$ grep SSL_get0_next_proto_negotiated /my/path/include/openssl/*
/my/path/include/openssl/ssl.h:void SSL_get0_next_proto_negotiated(const SSL *s,

我不确定我做错了什么,有什么想法吗？