BUILD: extend Travis CI config to support more platforms

This commit extends the Travis CI configuration to build HAProxy
with gcc on Linux, clang on Mac and cleans up the build flag
configuration to be easier extendable.

Note: At the moment HAProxy fails on Travis for configurations
on OS X

.travis.yml

@@ -3,22 +3,46 @@ dist: xenial
 
 language: c
 
+addons:
+  apt:
+    packages: [ liblua5.3-dev ]
+
 matrix:
   include:
-#  - os: linux
-#    compiler: gcc
-#    env: TARGET=linux2628
+  - os: linux
+    compiler: gcc
+    env: TARGET=linux2628 FLAGS=
+  - os: linux
+    compiler: gcc
+    env: TARGET=linux2628 FLAGS="USE_ZLIB=1 USE_PCRE=1 USE_LUA=1 USE_OPENSSL=1"
   - os: linux
     compiler: clang
-    env: TARGET=linux2628 USE_THREAD=1 USE_OPENSSL=1 USE_PCRE=1 USE_ZLIB=1 USE_GETADDRINFO=1
-#  - os: osx
-#    compiler: clang
-#    env: TARGET=osx SSL_LIB=/usr/local/opt/openssl/lib SSL_INC=/usr/local/opt/openssl/include TMPDIR=/var/tmp
+    env: TARGET=linux2628 FLAGS=
+  - os: osx
+    compiler: clang
+    env: TARGET=generic FLAGS=
+  allow_failures:
+    - os: osx
 
 install:
   - git clone https://github.com/VTest/VTest.git ../vtest
-  - make -C ../vtest
+  # Special flags due to: https://github.com/vtest/VTest/issues/12
+  - make -C ../vtest FLAGS="-O2 -s -Wall"
+
+before_script:
+  # This is a fix for the super long TMPDIR on Mac making
+  # the unix socket path names exceed the maximum allowed
+  # length.
+  - sed -i'.original' '/TESTDIR=.*haregtests/s/haregtests-.*XXXXXX/regtest.XXX/' scripts/run-regtests.sh
 
 script:
-  - make CC=$CC V=1 TARGET=$TARGET USE_THREAD=${USE_THREAD} USE_OPENSSL=${USE_OPENSSL} USE_PCRE=${USE_PCRE} USE_ZLIB=${USE_ZLIB} USE_GETADDRINFO=${USE_GETADDRINFO}
-  - make reg-tests PATH=${PATH}:${PWD}/../vtest VTEST_PROGRAM="../vtest/vtest -v"
+  - make CC=$CC V=1 TARGET=$TARGET $FLAGS
+  - ./haproxy -vv
+  - env VTEST_PROGRAM=../vtest/vtest make reg-tests
+
+after_failure:
+  - |
+    for folder in ${TMPDIR:-/tmp}/*regtest*/vtc.*; do
+      cat $folder/INFO
+      cat $folder/LOG
+    done