From 7d7a4f86c36da101ed3134818463f9faf000a1c7 Mon Sep 17 00:00:00 2001
From: greg <greg7mdp@gmail.com>
Date: Sat, 23 Mar 2019 10:36:05 -0400
Subject: [PATCH] wip

---
 cmake/CMakeLists.txt.in   | 15 +++++++++++++++
 cmake/DetectVersion.cmake |  8 ++++++++
 cmake/DownloadGTest.cmake | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+)
 create mode 100644 cmake/CMakeLists.txt.in
 create mode 100644 cmake/DetectVersion.cmake
 create mode 100644 cmake/DownloadGTest.cmake

diff --git a/cmake/CMakeLists.txt.in b/cmake/CMakeLists.txt.in
new file mode 100644
index 0000000..d60a33e
--- /dev/null
+++ b/cmake/CMakeLists.txt.in
@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 2.8.2)
+
+project(googletest-download NONE)
+
+include(ExternalProject)
+ExternalProject_Add(googletest
+  GIT_REPOSITORY    https://github.com/google/googletest.git
+  GIT_TAG           master
+  SOURCE_DIR        "${CMAKE_BINARY_DIR}/googletest-src"
+  BINARY_DIR        "${CMAKE_BINARY_DIR}/googletest-build"
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND     ""
+  INSTALL_COMMAND   ""
+  TEST_COMMAND      ""
+)
\ No newline at end of file
diff --git a/cmake/DetectVersion.cmake b/cmake/DetectVersion.cmake
new file mode 100644
index 0000000..4bffa5e
--- /dev/null
+++ b/cmake/DetectVersion.cmake
@@ -0,0 +1,8 @@
+
+file(READ "${CMAKE_CURRENT_SOURCE_DIR}/parallel_hashmap/phmap_config.h" _PHMAP_H_CONTENTS)
+string(REGEX REPLACE ".*#define PHMAP_VERSION_MAJOR ([0-9]+).*" "\\1" DETECTED_PHMAP_VERSION_MAJOR "${_PHMAP_H_CONTENTS}")
+string(REGEX REPLACE ".*#define PHMAP_VERSION_MINOR ([0-9]+).*" "\\1" DETECTED_PHMAP_VERSION_MINOR "${_PHMAP_H_CONTENTS}")
+string(REGEX REPLACE ".*#define PHMAP_VERSION_PATCH ([0-9]+).*" "\\1" DETECTED_PHMAP_VERSION_PATCH "${_PHMAP_H_CONTENTS}")
+set(DETECTED_PHMAP_VERSION "${DETECTED_PHMAP_VERSION_MAJOR}.${DETECTED_PHMAP_VERSION_MINOR}.${DETECTED_PHMAP_VERSION_PATCH}")
+
+message(STATUS "Detected PHMAP Version - ${DETECTED_PHMAP_VERSION}")
diff --git a/cmake/DownloadGTest.cmake b/cmake/DownloadGTest.cmake
new file mode 100644
index 0000000..3c682ae
--- /dev/null
+++ b/cmake/DownloadGTest.cmake
@@ -0,0 +1,32 @@
+# Downloads and unpacks googletest at configure time.  Based on the instructions
+# at https://github.com/google/googletest/tree/master/googletest#incorporating-into-an-existing-cmake-project
+
+# Download the latest googletest from Github master
+configure_file(
+  ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in
+  ${CMAKE_BINARY_DIR}/googletest-download/CMakeLists.txt
+)
+
+# Configure and build the downloaded googletest source
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-download )
+if(result)
+  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-download)
+if(result)
+  message(FATAL_ERROR "Build step for googletest failed: ${result}")
+endif()
+
+# Prevent overriding the parent project's compiler/linker settings on Windows
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+
+# Add googletest directly to our build. This defines the gtest and gtest_main
+# targets.
+add_subdirectory(${CMAKE_BINARY_DIR}/googletest-src
+                 ${CMAKE_BINARY_DIR}/googletest-build
+                 EXCLUDE_FROM_ALL)