testing g++ build [2]

.travis.yml

@@ -7,7 +7,7 @@ os:
   # - linux
   - osx
 sudo: required
-dist: stretch
+dist: xenial
 addons:
   apt:
     packages:
@@ -29,7 +29,6 @@ compiler:
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update ; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install libressl miniupnpc && brew upgrade boost ; fi
-  # - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew unlink boost openssl && brew link boost openssl -f ; fi
 env:
   matrix:
     - BUILD_TYPE=Release UPNP=ON

Makefile.osx

@@ -1,4 +1,6 @@
-#CXX = clang++
+ifndef TRAVIS_OS_NAME
+  CXX = clang++
+endif
 CXXFLAGS = -Os -Wall -std=c++11 -DMAC_OSX
 #CXXFLAGS = -g -O2 -Wall -std=c++11
 INCFLAGS = -I/usr/local/include