Fix fuzzer test script and add it to travis matrix (#606)

.travis.yml

@@ -45,6 +45,19 @@ matrix:
           - gcc-4.4
           - g++-4.4
 
+    ###
+    ## Test that fuzzer is compiling / working.
+    ###
+    - os: linux
+      env: BUILD_SYSTEM=fuzz C_COMPILER=clang-4.0 CXX_COMPILER=clang++-4.0
+      addons:
+        apt:
+          sources:
+          - ubuntu-toolchain-r-test
+          - llvm-toolchain-trusty-4.0
+          packages:
+          - clang-4.0
+
     ###
     ## clang on Linux
     ###

c/fuzz/test_fuzzer.sh

@@ -1,6 +1,11 @@
 #!/usr/bin/env bash
+set -e
 
-BROTLI="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." && pwd )"
+export CC=${CC:-cc}
+export CXX=${CXX:-c++}
+
+BROTLI="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../.." && pwd )"
+SRC=$BROTLI/c
 
 cd $BROTLI
 
@@ -8,16 +13,16 @@ rm -rf bin
 mkdir bin
 cd bin
 
-cmake .. -B./ -DBUILD_SHARED_LIBS=OFF -DBUILD_TESTING=OFF -DENABLE_SANITIZER=address
-make clean
-make -j$(nproc) brotlidec
+cmake $BROTLI -DCMAKE_C_COMPILER="$CC" -DCMAKE_CXX_COMPILER="$CXX" \
+    -DBUILD_TESTING=OFF -DENABLE_SANITIZER=address
+make -j$(nproc) brotlidec-static
 
-c++ -c -std=c++11 ../fuzz/decode_fuzzer.cc -I./include
-ar rvs decode_fuzzer.a decode_fuzzer.o
-c++ ../fuzz/run_decode_fuzzer.cc -o run_decode_fuzzer -lasan decode_fuzzer.a ./libbrotlidec.a ./libbrotlicommon.a
+${CXX} -o run_decode_fuzzer -std=c++11 -fsanitize=address -I$SRC/include \
+    $SRC/fuzz/decode_fuzzer.cc $SRC/fuzz/run_decode_fuzzer.cc \
+    ./libbrotlidec-static.a ./libbrotlicommon-static.a
 
 mkdir decode_corpora
-unzip ../java/org/brotli/integration/fuzz_data.zip -d decode_corpora
+unzip $BROTLI/java/org/brotli/integration/fuzz_data.zip -d decode_corpora
 
 for f in `ls decode_corpora`
 do

scripts/.travis.sh

@@ -51,6 +51,9 @@ case "$1" in
 		cd java/org/brotli
 		mvn install && cd integration && mvn verify
 		;;
+	    "fuzz")
+		./c/fuzz/test_fuzzer.sh
+		;;
 	    "bazel")
 		bazel test -c opt ...:all
 		;;