libexpat and libcurl not getting linked on macOS

[ilovezfs]

Despite configure claiming it has found libexpat and libcurl, they don't end up actually linked to libafflib unless I manually add -L/usr/lib -lcurl -lexpat to LDFLAGS.

When libafflib is not linked to libexpat, you get the error

ImportError: dlopen(/usr/local/Cellar/afflib/3.7.11/lib/python2.7/site-packages/pyaff.so, 2): Symbol not found: _XML_ErrorString
  Referenced from: /usr/local/Cellar/afflib/3.7.11/lib/libafflib.0.dylib
  Expected in: flat namespace
 in /usr/local/Cellar/afflib/3.7.11/lib/libafflib.0.dylib

When libafflib is not linked to libcurl, you get the error

>>> import pyaff
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/usr/local/lib/python2.7/site-packages/pyaff.so, 2): Symbol not found: _curl_easy_cleanup
  Referenced from: /usr/local/Cellar/afflib/3.7.11/lib/libafflib.0.dylib
  Expected in: flat namespace
 in /usr/local/Cellar/afflib/3.7.11/lib/libafflib.0.dylib

[sshock]

Fixed in e4d553e (merge pull request #18).