diff --git a/public/build.h b/public/build.h
new file mode 100644
index 00000000..96145d2b
--- /dev/null
+++ b/public/build.h
@@ -0,0 +1,205 @@
+/*
+build.h - compile-time build information
+Copyright (C) 2019 a1batross
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+*/
+#pragma once
+#ifndef BUILD_H
+#define BUILD_H
+
+// All XASH_* macros set by this header are guaranteed to have positive value otherwise not defined
+
+// Any new define must be undefined at first
+// You can generate #undef list below with this oneliner:
+//   $ cat build.h | sed 's/\t//g' | grep '^#define XASH' | awk '{ print $2 }' | sort | uniq | awk '{ print "#undef " $1 }'
+// 
+// So in various buildscripts you can grep for ^#undef XASH and select only second word
+// or in another oneliner:
+//   $ cat build.h | grep '^#undef XASH' | awk '{ print $2 }' 
+
+#undef XASH_64BIT
+#undef XASH_AMD64
+#undef XASH_ANDROID
+#undef XASH_APPLE
+#undef XASH_ARM
+#undef XASH_ARM64
+#undef XASH_ARM_HARDFP
+#undef XASH_ARM_SOFTFP
+#undef XASH_ARMv4
+#undef XASH_ARMv5
+#undef XASH_ARMv6
+#undef XASH_ARMv7
+#undef XASH_BIG_ENDIAN
+#undef XASH_BSD
+#undef XASH_E2K
+#undef XASH_EMSCRIPTEN
+#undef XASH_FREEBSD
+#undef XASH_IOS
+#undef XASH_JS
+#undef XASH_LINUX
+#undef XASH_LITTLE_ENDIAN
+#undef XASH_MINGW
+#undef XASH_MIPS
+#undef XASH_MOBILE_PLATFORM
+#undef XASH_MSVC
+#undef XASH_NETBSD
+#undef XASH_OPENBSD
+#undef XASH_WIN32
+#undef XASH_WIN64
+#undef XASH_X86
+
+//================================================================
+//
+//           OPERATING SYSTEM DEFINES
+//
+//================================================================
+#if defined(_WIN32)
+	#define XASH_WIN32 1
+	#if defined(__MINGW32__)
+		#define XASH_MINGW 1
+	#elif defined(_MSC_VER)
+		#define XASH_MSVC 1
+	#endif
+
+	#if defined(_WIN64)
+		#define XASH_WIN64 1
+	#endif
+#elif defined(__linux__)
+	#define XASH_LINUX 1
+	#if defined(__ANDROID__)
+		#define XASH_ANDROID 1
+	#endif // defined(__ANDROID__)
+#elif defined(__APPLE__)
+	#include <TargetConditionals.h>
+	#define XASH_APPLE 1
+	#if TARGET_OS_IOS
+		#define XASH_IOS 1
+	#endif // TARGET_OS_IOS
+#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
+	#define XASH_BSD 1
+	#if defined(__FreeBSD__)
+		#define XASH_FREEBSD 1
+	#elif defined(__NetBSD__)
+		#define XASH_NETBSD 1
+	#elif defined(__OpenBSD__)
+		#define XASH_OPENBSD 1
+	#endif
+#elif defined __EMSCRIPTEN__
+	#define XASH_EMSCRIPTEN 1
+#else
+#error "Place your operating system name here! If this is a mistake, try to fix conditions above and report a bug"
+#endif
+
+#if defined XASH_ANDROID || defined XASH_IOS
+	#define XASH_MOBILE_PLATFORM 1
+#endif
+
+//================================================================
+//
+//           ENDIANNESS DEFINES
+//
+//================================================================
+
+#if defined(XASH_LITTLE_ENDIAN) && defined(XASH_BIG_ENDIAN)
+	#error "Both XASH_LITTLE_ENDIAN and XASH_BIG_ENDIAN are defined"
+#endif
+
+#if !defined(XASH_LITTLE_ENDIAN) || !defined(XASH_BIG_ENDIAN)
+	#if defined XASH_MSVC || __LITTLE_ENDIAN__
+		//!!! Probably all WinNT installations runs in little endian
+		#define XASH_LITTLE_ENDIAN 1
+	#elif __BIG_ENDIAN__
+		#define XASH_BIG_ENDIAN 1
+	#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && defined(__ORDER_LITTLE_ENDIAN__) // some compilers define this
+		#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+			#define XASH_BIG_ENDIAN 1
+		#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+			#define XASH_LITTLE_ENDIAN 1
+		#else
+			#error "Unknown endianness!"
+		#endif
+	#else
+		#include <sys/param.h>
+		#if __BYTE_ORDER == __BIG_ENDIAN
+			#define XASH_BIG_ENDIAN 1
+		#elif __BYTE_ORDER == __LITTLE_ENDIAN
+			#define XASH_LITTLE_ENDIAN 1
+		#else
+			#error "Unknown endianness!"
+		#endif
+	#endif // !XASH_WIN32
+#endif
+
+//================================================================
+//
+//           CPU ARCHITECTURE DEFINES
+//
+//================================================================
+#if defined(__x86_64__) || defined(_M_X64)
+	#define XASH_64BIT 1
+	#define XASH_AMD64 1
+#elif defined(__i386__) || defined(_X86_) || defined(_M_IX86)
+	#define XASH_X86 1
+#elif defined __aarch64__
+	#define XASH_64BIT 1
+	#define XASH_ARM64 1
+#elif defined __arm__ || defined _M_ARM
+	#if defined _M_ARM
+		// msvc can only armv7 ?
+		#define XASH_ARM 7
+	#elif __ARM_ARCH == 7 || __ARM_ARCH_7__
+		#define XASH_ARM 7
+	#elif __ARM_ARCH == 6 || __ARM_ARCH_6__ || __ARM_ARCH_6J__
+		#define XASH_ARM 6
+	#elif __ARM_ARCH == 5 || __ARM_ARCH_5__
+		#define XASH_ARM 5
+	#elif __ARM_ARCH == 4 || __ARM_ARCH_4__
+		#define XASH_ARM 4
+	#else
+		#error "Unknown ARM"
+	#endif
+
+	#if defined _M_ARM
+		#error "No WinMobile port yet! Need to determine which ARM float ABI msvc uses if applicable"
+	#endif
+
+	#if defined __SOFTFP__ || __ARM_PCS_VFP == 0
+		#define XASH_ARM_SOFTFP 1
+	#else // __SOFTFP__
+		#define XASH_ARM_HARDFP 1
+	#endif // __SOFTFP__
+#elif defined __mips__
+	#define XASH_MIPS 1
+#elif defined __EMSCRIPTEN__
+	#define XASH_JS 1
+#elif defined __e2k__
+	#define XASH_64BIT 1
+	#define XASH_E2K 1
+#else
+	#error "Place your architecture name here! If this is a mistake, try to fix conditions above and report a bug"
+#endif
+
+#if defined(XASH_WAF_DETECTED_64BIT) && !defined(XASH_64BIT)
+	#define XASH_64BIT 1
+#endif
+
+#if XASH_ARM == 7
+	#define XASH_ARMv7 1
+#elif XASH_ARM == 6
+	#define XASH_ARMv6 1
+#elif XASH_ARM == 5
+	#define XASH_ARMv5 1
+#elif XASH_ARM == 4
+	#define XASH_ARMv4 1
+#endif
+
+#endif // BUILD_H