Use APT addon on Travis

This enables builds on container-based infrastructure.

.travis.yml

@@ -55,10 +55,16 @@ env:
   #- TESTS=commands         # r2 commands related
   - TESTS=tools            # tools related 
 
+# Force build on container-based infrastructure
+sudo: false
 
 # Additional depencies like capstone are downloaded by the r2 makefiles.
+addons:
+  apt:
+    packages:
+      - dc # GNU dc, used by r2r.
+
 install:
-  - sudo apt-get install dc # GNU dc, used by r2r.
   - git clone `doc/repo REGRESSIONS`
   # This little hack will prevent the test names from being erased in the
   # travis logfile.
@@ -74,9 +80,12 @@ script:
   # Limit the stack size (to 32MiB) to make ThreadSanitizer happy.
   - ulimit -s 32768
   # Now on to actually building stuff...
-  - ./configure > /dev/null  # TODO: Might enable some of the additional features.
+# Set prefix for which we don't need sudo
+  - ./configure --prefix=`pwd`/install > /dev/null  # TODO: Might enable some of the additional features.
   - make -s > /dev/null
-  - sudo make install > /dev/null
+  - make install > /dev/null
+  - PATH=`pwd`/install/bin:$PATH
+  - LD_LIBRARY_PATH=`pwd`/install/lib:$LD_LIBRARY_PATH
   - cd radare2-regressions
   # Run the tests, report only regressions as errors.
   - VERBOSE=1 make $TESTS