Move to gcc on osx.

.travis.yml

@@ -10,19 +10,6 @@ matrix:
         homebrew:
           packages:
             - libpcap
-          update: true
-
-    - os: osx
-      language: generic
-      env: TRAVIS_PYTHON_VERSION="3.7"
-      osx_image: xcode11.2
-      python: '3.7'
-      compiler: gcc
-      addons:
-        homebrew:
-          packages:
-            - libpcap
-          update: true
 
     - os: linux
       language: python

requirements.txt

@@ -1,2 +1,2 @@
 pyzmq>=18.1.1
-cffi>=1.13.1
+cffi>=1.13.2

setup.py

@@ -60,7 +60,7 @@ class BuildNdpiCommand(build_ext):
         subprocess.check_call(['git', 'clone', '--branch', '3.0-stable', 'https://github.com/ntop/nDPI.git'])
         os.chdir('nDPI/')
         subprocess.check_call(['./autogen.sh'])
-        subprocess.check_call(['./configure'])
+        subprocess.check_call(['CC=gcc ./configure'])
         subprocess.check_call(['make'])
         os.chdir('src/')
         os.chdir('lib/')
@@ -76,7 +76,7 @@ needs_pytest = {'pytest', 'test', 'ptr'}.intersection(sys.argv)
 pytest_runner = ['pytest-runner'] if needs_pytest else []
 
 python_requires = '>=3.6'
-install_requires = ['cffi>=1.13.1',
+install_requires = ['cffi>=1.13.2',
                     'pyzmq>=18.1.1']
 
 if os.getenv('READTHEDOCS'):