next try, sodium version test failed, maybe the path were wrong?

.travis.yml

@@ -5,7 +5,7 @@ before_install:
   - git clone https://github.com/jedisct1/libsodium
   - cd libsodium
   - ./autogen.sh
-  - ./configure
+  - ./configure --prefix=/usr
   - make
   - sudo make install
   - cd ..
@@ -16,6 +16,8 @@ compiler:
   - gcc
 script:
  - ./configure
+ - gcc sv.c -lsodium -o sv
+ - ./sv
  - make
  - make check
  - make test