added clang test in travis

diff --git a/.travis.yml b/.travis.yml
index b3a654378d87df7680546ce1ccf0fe15c1ab67b2..64e01f8b4d800dc79d4902d9bff5c345f15c9a71 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,12 +30,14 @@ matrix:
       script:
         - make test
 
-    - name: gcc-6 + gcc-7 compilation
+    - name: clang + gcc-6 + gcc-7 compilation
       script:
         - make gcc6install gcc7install
         - CC=gcc-6 CFLAGS=-Werror make -j all
         - make clean
         - CC=gcc-7 CFLAGS=-Werror make -j all
+        - make clean
+        - CXX=clang++ CC=clang CFLAGS="-Werror -Wconversion -Wno-sign-conversion -Wdocumentation" make all
 
     - name: gcc-8 + ASan + UBSan + Test Zstd
       script: