Bernhard Schelling schellingb

Building a universal Windows 7/Windows 10 .NET EXE

The problem with building a .NET (classic) executable that runs on both clean Windows 7 install and on Windows 10 is that Windows 7 only ships with .NET 3.5 inbox and Windows 10 ships with .NET 4.X. A .NET 3.5 executable will not run on a (clean install) Windows 10 directly. It can be coerced to do so in multiple ways, but none of them are "worry-free single file" solutions (config file, registry settings, environment variables, etc.).

One of the solutions is to set COMPLUS_OnlyUseLatestCLR environment variable to 1 before the process starts. This will allow .NET 4.X to take over execution of the program. This still doesn't qualify as "worry-free" because we need a batch file or something else to set the envionment for us before the process start (it's too late once Main is executing).

One weird trick to run the same executable on both Windows 7 and Windows 10

When I said we need to set COMPLUS_OnlyUseLatestCLR environment variable to 1 bef

	#if PLATFORM_WINDOWS && !WITH_EDITOR && UE_BUILD_SHIPPING
	static struct FUE4GameUserSettingsLoader
	{
	FUE4GameUserSettingsLoader()
	{
	// This static constructor is called early enough that we can bind these required delegates before engine startup
	FCoreDelegates::TSCountPreLoadConfigFileRespondersDelegate().AddStatic(CountPreLoadConfigFileRespondersDelegate);
	FCoreDelegates::TSPreLoadConfigFileDelegate().AddStatic(PreLoadConfigFileDelegate);
	FCoreDelegates::TSPreSaveConfigFileDelegate().AddStatic(PreSaveConfigFileDelegate);
	}

	/*
	Access C++ Private Member
	License: Public Domain (www.unlicense.org)
	Based on http://cpp.kjx.cz/private_backdoor.html which itself is based on http://bloglitb.blogspot.com/2011/12/access-to-private-members-safer.html
	*/

	#include <stdio.h>

	class CSafe
	{

	static BlockReturn gen_runcodeInit(Bit8u *code);
	static BlockReturn (gen_runcode)(Bit8u code) = gen_runcodeInit;

	static BlockReturn gen_runcodeInit(Bit8u *code) {
	Bit8u* oldpos = cache.pos;
	cache.pos = &cache_code_link_blocks[128];
	gen_runcode = (BlockReturn()(Bit8u))cache.pos;

	#if 1
	cache_addb(0x53); // push ebx

	#define SpiralForMacro(STARTX, STARTY, CODE) \
	{ \
	FIntPoint tile = FIntPoint(0, 0), delta = FIntPoint(0, -1); \
	for (;;) \
	{ \
	FIntPoint tc = {(STARTX) + tile.X, (STARTY) + tile.Y}; \
	\
	{ CODE } \
	\
	if ((tile.X == tile.Y) \|\| ((tile.X < 0) && (tile.X == -tile.Y)) \|\| ((tile.X > 0) && (tile.X == 1-tile.Y))) \

	Bit8u hdr[44];
	#define WAV_WRITE_LE16(b,v) { (b)[0] = (unsigned char)((unsigned short)(v) & 0xFF); (b)[1] = (unsigned char)((unsigned short)(v) >> 8); }
	#define WAV_WRITE_LE32(b,v) { (b)[0] = (unsigned char)((unsigned int)(v) & 0xFF); (b)[1] = (unsigned char)(((unsigned int)(v) >> 8) & 0xFF); (b)[2] = (unsigned char)(((unsigned int)(v) >> 16) & 0xFF); (b)[3] = (unsigned char)((unsigned int)(v) >> 24); }
	WAV_WRITE_LE32(hdr + 0, 0x46464952U); //"RIFF"
	WAV_WRITE_LE32(hdr + 4, 36 + pcm_data_size); //chunk size
	WAV_WRITE_LE32(hdr + 8, 0x45564157U); //"WAVE"
	WAV_WRITE_LE32(hdr + 12, 0x20746d66U); //subchunk 1 id "fmt "
	WAV_WRITE_LE32(hdr + 16, 16); //subchunk 1 size
	WAV_WRITE_LE16(hdr + 20, 1); //audio format
	WAV_WRITE_LE16(hdr + 22, channels); //num of chan

	<?xml version="1.0" encoding="utf-8"?>
	<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
	<ItemGroup Label="ProjectConfigurations">
	<ProjectConfiguration Include="Debug\|Win32">
	<Configuration>Debug</Configuration>
	<Platform>Win32</Platform>
	</ProjectConfiguration>
	<ProjectConfiguration Include="Debug\|x64">
	<Configuration>Debug</Configuration>
	<Platform>x64</Platform>

	<?xml version="1.0" encoding="utf-8"?>
	<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
	<ItemGroup>
	<ClCompile Include="griffin\griffin.c">
	<Filter>griffin</Filter>
	</ClCompile>
	<ClCompile Include="griffin\griffin_cpp.cpp">
	<Filter>griffin</Filter>
	</ClCompile>
	<ClCompile Include="griffin\griffin_glslang.cpp">

	sudo mkdir /mnt/ramdisk 2>/dev/null
	sudo chmod 777 /mnt/ramdisk 2>/dev/null
	sudo umount /mnt/ramdisk 2>/dev/null
	sudo mount -t tmpfs -o size=512m tmpfs /mnt/ramdisk
	cd /mnt/ramdisk
	git clone --single-branch --branch some_branch_to_check --depth 1 https://github.com/schellingb/RetroArch.git
	#git clone --single-branch --branch master --depth 1 https://github.com/libretro/RetroArch.git
	cd RetroArch
	rm -rf .git
	./configure && make -j4 DEBUG=1 && ./retroarch