[libFuzzer] replace slow std::mt19937 with a much faster std::minstd_rand; second attempt after failed r352732, this time with a fix for cmake

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@353782 91177308-0d34-0410-b5e6-96231b3b80d8

Author: kcc

FuzzerRandom.h

@@ -14,10 +14,10 @@
 #include <random>
 
 namespace fuzzer {
-class Random : public std::mt19937 {
+class Random : public std::minstd_rand {
  public:
-  Random(unsigned int seed) : std::mt19937(seed) {}
-  result_type operator()() { return this->std::mt19937::operator()(); }
+  Random(unsigned int seed) : std::minstd_rand(seed) {}
+  result_type operator()() { return this->std::minstd_rand::operator()(); }
   size_t Rand() { return this->operator()(); }
   size_t RandBool() { return Rand() % 2; }
   size_t SkewTowardsLast(size_t n) {

tests/CMakeLists.txt

@@ -46,7 +46,8 @@ if(COMPILER_RT_DEFAULT_TARGET_ARCH IN_LIST FUZZER_SUPPORTED_ARCH)
     FOLDER "Compiler-RT Runtime tests")
 
   if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" AND COMPILER_RT_LIBCXX_PATH)
-    set(LIBFUZZER_TEST_RUNTIME_DEPS libcxx_fuzzer_${arch}-build)
+    file(GLOB libfuzzer_headers ../*.h)
+    set(LIBFUZZER_TEST_RUNTIME_DEPS libcxx_fuzzer_${arch}-build ${libfuzzer_headers})
     set(LIBFUZZER_TEST_RUNTIME_CFLAGS -isystem ${LIBCXX_${arch}_PREFIX}/include/c++/v1)
     set(LIBFUZZER_TEST_RUNTIME_LINK_FLAGS ${LIBCXX_${arch}_PREFIX}/lib/libc++.a)
   endif()