Missed some files due to .gitignore

.gitignore

@@ -16,7 +16,6 @@ build/vs17/
 [Dd]ebug/
 [Rr]elease/
 x64/
-build/
 [Bb]in/
 [Oo]bj/
 

build/CMakeLists.txt

@@ -0,0 +1,6 @@
+# Include any compiler-specifc settings
+if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/build/${CMAKE_CXX_COMPILER_ID}")
+    include("${CMAKE_CURRENT_SOURCE_DIR}/build/${CMAKE_CXX_COMPILER_ID}/CMakeLists.txt")
+else()
+    message(STATUS "No compiler-specific settings set; CMAKE_CXX_COMPILER_ID: ${CMAKE_CXX_COMPILER_ID}")
+endif()

build/GNU/CMakeLists.txt

@@ -0,0 +1,4 @@
+# GCC-specific compiler settings
+
+# Enable pthreads
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")

build/MSVC/CMakeLists.txt

@@ -0,0 +1,4 @@
+# Setup MSVC-specific macros
+add_definitions(
+        -D_CRT_SECURE_NO_WARNINGS
+        -D_CRT_NONSTDC_NO_DEPRECATE)

build/cmake_vs17.bat

@@ -0,0 +1,4 @@
+rmdir /S /Q vs17
+mkdir vs17
+cd vs17
+cmake ..\.. -G "Visual Studio 15 2017"