Step one towards merging timer changes.

This patch cleans up our use of generic macros and also merges changes in the build system. It adds options -DBENCHMARK_ENABLE_TESTING and -DBENCHMARK_ENABLE_SHARED.
2015-03-06 12:35:00 -05:00 · 2015-03-06 12:35:00 -05:00 · 5b41e128b3
parent c5a362b4d3
commit 5b41e128b3
12 changed files with 228 additions and 162 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -1,29 +1,17 @@
 matrix:
  include:
    - os: linux
-      env: SUITE=tests    BUILD_TYPE=Debug   STD=c++0x
+      env: BUILD_TYPE=Debug   STD=c++0x
    - os: linux
-      env: SUITE=tests    BUILD_TYPE=Debug   STD=c++11
+      env: BUILD_TYPE=Debug   STD=c++11
    - os: linux
-      env: SUITE=tests    BUILD_TYPE=Release STD=c++0x
+      env: BUILD_TYPE=Release STD=c++0x
    - os: linux
-      env: SUITE=tests    BUILD_TYPE=Release STD=c++11
-    - os: linux
-      env: SUITE=examples BUILD_TYPE=Debug   STD=c++0x
-    - os: linux
-      env: SUITE=examples BUILD_TYPE=Debug   STD=c++11
-    - os: linux
-      env: SUITE=examples BUILD_TYPE=Release STD=c++0x
-    - os: linux
-      env: SUITE=examples BUILD_TYPE=Release STD=c++11
+      env: BUILD_TYPE=Release STD=c++11
    - os: osx
-      env: SUITE=tests    BUILD_TYPE=Debug   STD=c++11
+      env: BUILD_TYPE=Debug   STD=c++11
    - os: osx
-      env: SUITE=tests    BUILD_TYPE=Release STD=c++11
-    - os: osx
-      env: SUITE=examples BUILD_TYPE=Debug   STD=c++11
-    - os: osx
-      env: SUITE=examples BUILD_TYPE=Release STD=c++11
+      env: BUILD_TYPE=Release STD=c++11

 language:
    - cpp
@ -42,5 +30,4 @@ before_script:
 script:
    - cmake .. -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_CXX_FLAGS="-std=${STD}"
    - make
-    - if [ "$SUITE" = "tests" ]; then ./test/re_test; fi
-    - if [ "$SUITE" = "examples" ]; then ./test/benchmark_test; fi
+    - make test
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -1,70 +1,11 @@
 cmake_minimum_required (VERSION 2.8)
 project (benchmark)

+option(BENCHMARK_ENABLE_SHARED  "Enable building a shared library." OFF)
+option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
 # Make sure we can import out CMake functions
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

-# Import and build Google Test
-include(ExternalProject)
-set_directory_properties(properties EP_PREFIX "${CMAKE_BINARY_DIR}/third_party")
-ExternalProject_Add(googletest
-  URL "https://googletest.googlecode.com/files/gtest-1.7.0.zip"
-  URL_MD5 2d6ec8ccdf5c46b05ba54a9fd1d130d7
-  SOURCE_DIR "${CMAKE_BINARY_DIR}/third_party/gtest"
-  CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-  INSTALL_COMMAND "")
-ExternalProject_Get_Property(googletest source_dir)
-include_directories(${source_dir}/include)
-ExternalProject_Get_Property(googletest binary_dir)
-link_directories(${binary_dir})
-
-# Try and enable C++11. Don't use C++14 because it doesn't work in some
-# configurations.
-include(CheckCXXCompilerFlag)
-check_cxx_compiler_flag(--std=c++11 HAVE_FLAG_CXX_11)
-check_cxx_compiler_flag(--std=c++0x HAVE_FLAG_CXX_0X)
-if (HAVE_FLAG_CXX_11)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++11")
-elseif (HAVE_FLAG_CXX_0X)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++0x")
-endif()
-
-# Turn compiler warnings up to 11
-include(AddCXXCompilerFlag)
-add_cxx_compiler_flag(-Wall)
-add_cxx_compiler_flag(-Wshadow)
-add_cxx_compiler_flag(-Werror)
-add_cxx_compiler_flag(-pedantic-errors)
-#add_cxx_compiler_flag(-Wzero-as-null-pointer-constant)
-
-# Release flags
-add_cxx_compiler_flag(-fno-strict-aliasing RELEASE)
-
-# Add a debug definition so we can make decisions in the compilation
-set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG")
-
-# Set OS
-if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
-  add_definitions(-DOS_MACOSX)
-endif()
-
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
-  add_definitions(-DOS_LINUX)
-endif()
-
-if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  add_definitions(-DOS_WINDOWS)
-endif()
-
-if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
-  add_definitions(-DOS_FREEBSD)
-endif()
-
-# Set CPU
-if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86")
-  add_definitions(-DARCH_X86)
-endif()
-
 # Read the git tags to determine the project version
 include(GetGitVersion)
 get_git_version(GIT_VERSION)
@ -77,17 +18,45 @@ message("-- Version: ${VERSION}")
 set(GENERIC_LIB_VERSION ${VERSION})
 string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)

-# C++ feature checks
+# Try and enable C++11. Don't use C++14 because it doesn't work in some
+# configurations.
+include(CheckCXXCompilerFlag)
+include(AddCXXCompilerFlag)
 include(CXXFeatureCheck)
+
+check_cxx_compiler_flag(-std=c++11 HAVE_FLAG_CXX_11)
+check_cxx_compiler_flag(-std=c++0x HAVE_FLAG_CXX_0X)
+if (HAVE_FLAG_CXX_11)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+elseif (HAVE_FLAG_CXX_0X)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
+endif()
+
+# Turn compiler warnings up to 11
+add_cxx_compiler_flag(-Wall)
+add_cxx_compiler_flag(-Wextra)
+add_cxx_compiler_flag(-Wshadow)
+add_cxx_compiler_flag(-Werror)
+add_cxx_compiler_flag(-pedantic-errors)
+# TODO(ericwf): enable this for g++
+#add_cxx_compiler_flag(-Wzero-as-null-pointer-constant)
+# Release flags
+add_cxx_compiler_flag(-fno-strict-aliasing RELEASE)
+
+add_cxx_compiler_flag(-Wthread-safety)
+
+# C++ feature checks
 cxx_feature_check(STD_REGEX)
 cxx_feature_check(GNU_POSIX_REGEX)
 cxx_feature_check(POSIX_REGEX)

 # Set up directories
 include_directories(${PROJECT_SOURCE_DIR}/include)
-include_directories(${PROJECT_SOURCE_DIR}/src)

 # Build the targets
-enable_testing()
 add_subdirectory(src)
-add_subdirectory(test)
+
+if (BENCHMARK_ENABLE_TESTING)
+  enable_testing()
+  add_subdirectory(test)
+endif()
--- a/include/benchmark/benchmark.h
+++ b/include/benchmark/benchmark.h
@ -295,7 +295,7 @@ class State {
  std::unique_ptr<ThreadStats> stats_;

  friend class internal::Benchmark;
-  DISALLOW_COPY_AND_ASSIGN(State)
+  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(State);
 };

 // Interface for custom benchmark result printers.
@ -479,7 +479,7 @@ class Benchmark {
  friend struct ::benchmark::internal::Benchmark::Instance;
  friend void ::benchmark::internal::RunMatchingBenchmarks(
      const std::string&, const BenchmarkReporter*);
-  DISALLOW_COPY_AND_ASSIGN(Benchmark)
+  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(Benchmark);
 };

 // ------------------------------------------------------
@ -510,7 +510,7 @@ class ConsoleReporter : public BenchmarkReporter {

 #define BENCHMARK(n)                                         \
  static ::benchmark::internal::Benchmark* BENCHMARK_CONCAT( \
-      __benchmark_, n, __LINE__) ATTRIBUTE_UNUSED =          \
+      __benchmark_, n, __LINE__) BENCHMARK_UNUSED =          \
      (new ::benchmark::internal::Benchmark(#n, n))

 // Old-style macros
@ -530,12 +530,12 @@ class ConsoleReporter : public BenchmarkReporter {
 // will register BM_Foo<1> as a benchmark.
 #define BENCHMARK_TEMPLATE(n, a)                             \
  static ::benchmark::internal::Benchmark* BENCHMARK_CONCAT( \
-      __benchmark_, n, __LINE__) ATTRIBUTE_UNUSED =          \
+      __benchmark_, n, __LINE__) BENCHMARK_UNUSED =          \
      (new ::benchmark::internal::Benchmark(#n "<" #a ">", n<a>))

 #define BENCHMARK_TEMPLATE2(n, a, b)                         \
  static ::benchmark::internal::Benchmark* BENCHMARK_CONCAT( \
-      __benchmark_, n, __LINE__) ATTRIBUTE_UNUSED =          \
+      __benchmark_, n, __LINE__) BENCHMARK_UNUSED =          \
      (new ::benchmark::internal::Benchmark(#n "<" #a "," #b ">", n<a, b>))

 #endif  // BENCHMARK_BENCHMARK_H_
--- a/include/benchmark/macros.h
+++ b/include/benchmark/macros.h
@ -1,51 +1,44 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 #ifndef BENCHMARK_MACROS_H_
 #define BENCHMARK_MACROS_H_

-#include <assert.h>
-#include <stddef.h>
-
-#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
+#if __cplusplus < 201103L
+# define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName)  \
    TypeName(const TypeName&);                         \
-  void operator=(const TypeName&);
-
-// The arraysize(arr) macro returns the # of elements in an array arr.
-// The expression is a compile-time constant, and therefore can be
-// used in defining new arrays, for example.  If you use arraysize on
-// a pointer by mistake, you will get a compile-time error.
-//
-// One caveat is that, for C++03, arraysize() doesn't accept any array of
-// an anonymous type or a type defined inside a function.  In these rare
-// cases, you have to use the unsafe ARRAYSIZE() macro below.  This is
-// due to a limitation in C++03's template system.  The limitation has
-// been removed in C++11.
-
-// This template function declaration is used in defining arraysize.
-// Note that the function doesn't need an implementation, as we only
-// use its type.
-template <typename T, size_t N>
-char (&ArraySizeHelper(T (&array)[N]))[N];
-
-// That gcc wants both of these prototypes seems mysterious. VC, for
-// its part, can't decide which to use (another mystery). Matching of
-// template overloads: the final frontier.
-#ifndef COMPILER_MSVC
-template <typename T, size_t N>
-char (&ArraySizeHelper(const T (&array)[N]))[N];
+    TypeName& operator=(const TypeName&)
+#else
+# define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName)  \
+    TypeName(const TypeName&) = delete;                \
+    TypeName& operator=(const TypeName&) = delete
 #endif

-#define arraysize(array) (sizeof(ArraySizeHelper(array)))
+#if defined(__GNUC__)
+# define BENCHMARK_UNUSED __attribute__((unused))
+# define BENCHMARK_ALWAYS_INLINE __attribute__((always_inline))
+#elif defined(_MSC_VER) && !defined(__clang__)
+# define BENCHMARK_UNUSED
+# define BENCHMARK_ALWAYS_INLINE __forceinline
+#else
+# define BENCHMARK_UNUSED
+# define BENCHMARK_ALWAYS_INLINE
+#endif

-//
-// Prevent the compiler from complaining about or optimizing away variables
-// that appear unused.
-#define ATTRIBUTE_UNUSED __attribute__((unused))
-
-//
-// For functions we want to force inline or not inline.
-// Introduced in gcc 3.1.
-#define ATTRIBUTE_ALWAYS_INLINE __attribute__((always_inline))
-#define HAVE_ATTRIBUTE_ALWAYS_INLINE 1
-#define ATTRIBUTE_NOINLINE __attribute__((noinline))
-#define HAVE_ATTRIBUTE_NOINLINE 1
+#if defined(__GNUC__)
+# define BENCHMARK_BUILTIN_EXPECT(x, y) __builtin_expect(x, y)
+#else
+# define BENCHMARK_BUILTIN_EXPECT(x, y) x
+#endif

 #endif  // BENCHMARK_MACROS_H_
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@ -1,6 +1,10 @@
-# Define the source files
-set(SOURCE_FILES "benchmark.cc" "colorprint.cc" "commandlineflags.cc" "sleep.cc" "sysinfo.cc" "walltime.cc")
+# Allow the source files to find headers in src/
+include_directories(${PROJECT_SOURCE_DIR}/src)

+# Define the source files
+set(SOURCE_FILES "benchmark.cc" "commandlineflags.cc"
+                 "colorprint.cc" "sleep.cc"
+                 "sysinfo.cc" "walltime.cc")
 # Determine the correct regular expression engine to use
 if(HAVE_STD_REGEX)
  set(RE_FILES "re_std.cc")
@ -12,19 +16,20 @@ else()
  message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
 endif()

-# Build a regular expression library
-add_library(benchmark_re ${RE_FILES})
-set_target_properties(benchmark_re PROPERTIES
-  VERSION ${GENERIC_LIB_VERSION}
-  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
-
 # Build the benchmark library
-add_library(benchmark ${SOURCE_FILES} ${RE_FILES})
+if (BENCHMARK_ENABLE_SHARED)
+  add_library(benchmark SHARED ${SOURCE_FILES} ${RE_FILES})
+  find_package(Threads REQUIRED)
+  target_link_libraries(benchmark ${CMAKE_THREAD_LIBS_INIT})
+else()
+  add_library(benchmark STATIC ${SOURCE_FILES} ${RE_FILES})
+endif()
+
 set_target_properties(benchmark PROPERTIES
+  OUTPUT_NAME "benchmark"
  VERSION ${GENERIC_LIB_VERSION}
  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
+  )

 # Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
 install(
@ -32,6 +37,7 @@ install(
  ARCHIVE DESTINATION lib
  LIBRARY DESTINATION lib
  COMPONENT library)
+
 install(
  DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
  DESTINATION include
--- a/src/arraysize.h
+++ b/src/arraysize.h
@ -0,0 +1,36 @@
+#ifndef BENCHMARK_ARRAYSIZE_H_
+#define BENCHMARK_ARRAYSIZE_H_
+
+#include <cstddef>
+
+#include "internal_macros.h"
+
+namespace benchmark {
+namespace internal {
+// The arraysize(arr) macro returns the # of elements in an array arr.
+// The expression is a compile-time constant, and therefore can be
+// used in defining new arrays, for example.  If you use arraysize on
+// a pointer by mistake, you will get a compile-time error.
+//
+
+
+// This template function declaration is used in defining arraysize.
+// Note that the function doesn't need an implementation, as we only
+// use its type.
+template <typename T, size_t N>
+char (&ArraySizeHelper(T (&array)[N]))[N];
+
+// That gcc wants both of these prototypes seems mysterious. VC, for
+// its part, can't decide which to use (another mystery). Matching of
+// template overloads: the final frontier.
+#ifndef COMPILER_MSVC
+template <typename T, size_t N>
+char (&ArraySizeHelper(const T (&array)[N]))[N];
+#endif
+
+#define arraysize(array) (sizeof(::benchmark::internal::ArraySizeHelper(array)))
+
+} // end namespace internal
+} // end namespace benchmark
+
+#endif // BENCHMARK_ARRAYSIZE_H_
--- a/src/benchmark.cc
+++ b/src/benchmark.cc
@ -13,9 +13,11 @@
 // limitations under the License.

 #include "benchmark/benchmark.h"
+#include "arraysize.h"
 #include "check.h"
 #include "colorprint.h"
 #include "commandlineflags.h"
+#include "internal_macros.h"
 #include "re.h"
 #include "sleep.h"
 #include "stat.h"
@ -628,7 +630,7 @@ class State::FastClock {
    }
  }

-  DISALLOW_COPY_AND_ASSIGN(FastClock)
+  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(FastClock);
 };

 struct State::ThreadStats {
@ -693,7 +695,7 @@ struct State::SharedState {
        exited(0),
        threads(b == nullptr ? 1 : b->threads) { }

-  DISALLOW_COPY_AND_ASSIGN(SharedState)
+  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(SharedState);
 };

 namespace internal {
--- a/src/cycleclock.h
+++ b/src/cycleclock.h
@ -49,7 +49,7 @@ namespace benchmark {
 //    https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
 namespace cycleclock {
 // This should return the number of cycles since power-on.  Thread-safe.
-inline ATTRIBUTE_ALWAYS_INLINE int64_t Now() {
+inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
 #if defined(OS_MACOSX)
  // this goes at the top because we need ALL Macs, regardless of
  // architecture, to return the number of "mach time units" that
--- a/src/internal_macros.h
+++ b/src/internal_macros.h
@ -0,0 +1,40 @@
+#ifndef BENCHMARK_INTERNAL_MACROS_H_
+#define BENCHMARK_INTERNAL_MACROS_H_
+
+#include "benchmark/macros.h"
+
+#ifndef __has_feature
+# define __has_feature(x) 0
+#endif
+
+#if __has_feature(cxx_attributes)
+# define BENCHMARK_NORETURN [[noreturn]]
+#elif defined(__GNUC__)
+# define BENCHMARK_NORETURN __attribute__((noreturn))
+#else
+# define BENCHMARK_NORETURN
+#endif
+
+#if defined(__CYGWIN__)
+# define OS_CYGWIN 1
+#elif defined(_WIN32)
+# define OS_WINDOWS 1
+#elif defined(__APPLE__)
+// TODO(ericwf) This doesn't actually check that it is a Mac OSX system. Just
+// that it is an apple system.
+# define OS_MACOSX 1
+#elif defined(__FreeBSD__)
+# define OS_FREEBSD 1
+#elif defined(__linux__)
+# define OS_LINUX 1
+#endif
+
+#if defined(__clang__)
+# define COMPILER_CLANG
+#elif defined(_MSC_VER)
+# define COMPILER_MSVC
+#elif defined(__GNUC__)
+# define COMPILER_GCC
+#endif
+
+#endif // BENCHMARK_INTERNAL_MACROS_H_
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@ -1,18 +1,45 @@
+# Enable the tests
+
+# Import and build Google Test
+include(ExternalProject)
+set_directory_properties(properties EP_PREFIX "${CMAKE_BINARY_DIR}/third_party")
+ExternalProject_Add(googletest
+  URL "https://googletest.googlecode.com/files/gtest-1.7.0.zip"
+  URL_MD5 2d6ec8ccdf5c46b05ba54a9fd1d130d7
+  SOURCE_DIR "${CMAKE_BINARY_DIR}/third_party/gtest"
+  CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+  INSTALL_COMMAND "")
+
+ExternalProject_Get_Property(googletest source_dir)
+ExternalProject_Get_Property(googletest binary_dir)
+include_directories(${source_dir}/include)
+link_directories(${binary_dir})
+
 find_package(Threads REQUIRED)

+macro(compile_benchmark_test name)
+  add_executable(${name} "${name}.cc")
+  target_link_libraries(${name} benchmark gtest ${CMAKE_THREAD_LIBS_INIT})
+  add_dependencies(${name} googletest)
+endmacro(compile_benchmark_test)
+
+macro (add_benchmark_test name)
+  compile_benchmark_test(${name})
+  add_test(${name} ${name} --benchmarks=all)
+endmacro(add_benchmark_test)
+
+macro(add_gtest_test name)
+  add_executable(${name} "${name}.cc")
+  target_link_libraries(${name} benchmark gtest gtest_main ${CMAKE_THREAD_LIBS_INIT})
+  add_dependencies(${name} googletest)
+  add_test(${name} ${name})
+endmacro(add_gtest_test)
+
 # Demonstration executable
-add_executable(benchmark_test benchmark_test.cc)
-target_link_libraries(benchmark_test benchmark gtest ${CMAKE_THREAD_LIBS_INIT})
-add_dependencies(benchmark_test googletest)
-add_test(benchmark benchmark_test 50)
+compile_benchmark_test(benchmark_test)
+add_test(benchmark benchmark_test --benchmark_min_time=0.1 50)
 add_test(benchmark_filter_simple benchmark_test --benchmark_filter=Calculate 16)
-add_test(benchmark_filter_prefix benchmark_test --benchmark_filter=*Calculate 0)
 add_test(benchmark_filter_suffix benchmark_test --benchmark_filter=Calculate* 16)
-add_test(benchmark_filter_both benchmark_test --benchmark_filter=*Calculate* 0)
 add_test(benchmark_filter_regex_wildcard benchmark_test --benchmark_filter=.*Calculate.* 16)

-# Test harness for regex wrapper
-add_executable(re_test ${RE_FILES} "re_test.cc")
-target_link_libraries(re_test benchmark_re gtest gtest_main ${CMAKE_THREAD_LIBS_INIT})
-add_dependencies(re_test googletest)
-add_test(regex re_test)
+add_gtest_test(re_test)
--- a/test/benchmark_test.cc
+++ b/test/benchmark_test.cc
@ -16,10 +16,16 @@

 #include <gtest/gtest.h>

+#if defined(__GNUC__)
+# define BENCHMARK_NOINLINE __attribute__((noinline))
+#else
+# define BENCHMARK_NOINLINE
+#endif
+
 namespace {

 #ifdef DEBUG
-int ATTRIBUTE_NOINLINE Factorial(uint32_t n) {
+int BENCHMARK_NOINLINE Factorial(uint32_t n) {
  return (n == 1) ? 1 : n * Factorial(n - 1);
 }
 #endif
@ -69,7 +75,7 @@ BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);

 static void BM_CalculatePi(benchmark::State& state) {
  static const int depth = 1024;
-  double pi ATTRIBUTE_UNUSED = 0.0;
+  double pi BENCHMARK_UNUSED = 0.0;
  while (state.KeepRunning()) {
    pi = CalculatePi(depth);
  }
--- a/test/re_test.cc
+++ b/test/re_test.cc
@ -13,7 +13,7 @@
 // limitations under the License.

 #include <gtest/gtest.h>
-#include "re.h"
+#include "../src/re.h"

 TEST(Regex, RegexSimple) {
    benchmark::Regex re;