(Windows) Added in-tree dependencies build scripts for MinGW.

tools/Windows_dependencies_build_MSVC.bat

@@ -4,7 +4,7 @@
 ::  Windows_dependencies_build_MSVC.bat
 ::
 ::  Builds the external dependencies in-tree using MSVC.
-::  The Windows_dependencies_setup_MSVC.bat script must have been executed before this one.
+::  The Windows_dependencies_setup_MSVC.bat script must have been executed prior to this.
 ::  All libraries will be recompiled from scratch every time.
 ::
 ::  This script needs to run from the root of the repository.

tools/Windows_dependencies_build_MinGW.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+#  SPDX-License-Identifier: MIT
+#
+#  EmulationStation Desktop Edition
+#  Windows_dependencies_build_MinGW.sh
+#
+#  Builds the external dependencies in-tree.
+#  The Windows_dependencies_setup_MinGW.sh script must have been executed prior to this.
+#  All libraries will be recompiled from scratch every time.
+#
+#  This script needs to run from the root of the repository.
+#
+
+# How many CPU threads to use for the compilation.
+JOBS=4
+
+if [ ! -f .clang-format ]; then
+  echo "You need to run this script from the root of the repository."
+  exit
+fi
+
+cd external
+
+if [ ! -d pugixml ]; then
+  echo "You need to first run tools/Windows_dependencies_setup_MinGW.sh to download and configure the dependencies."
+  exit
+fi
+
+echo "Building all dependencies in the ./external directory..."
+
+echo -e "\nBuilding GLEW"
+cd glew-2.1.0
+make clean
+make -j${JOBS} 2>/dev/null
+cp lib/glew32.dll ../..
+cd ..
+
+echo -e "\nBuilding FreeType"
+
+cd freetype/build
+rm -f CMakeCache.txt
+cmake -G "MinGW Makefiles" -DBUILD_SHARED_LIBS=ON ..
+make clean
+make -j${JOBS}
+cp libfreetype.dll ../../..
+cd ../..
+
+echo -e "\nBuilding pugixml"
+cd pugixml
+rm -f CMakeCache.txt
+cmake -G "MinGW Makefiles" -DBUILD_SHARED_LIBS=ON .
+make clean
+make -j${JOBS}
+cp libpugixml.dll ../..
+cd ..

tools/Windows_dependencies_setup_MSVC.bat

@@ -145,9 +145,9 @@ echo:
 echo Setting up OpenSSL
 
 if not exist "C:\Program Files\OpenSSL-Win64\libcrypto-1_1-x64.dll" (
-  curl -O https://slproweb.com/download/Win64OpenSSL_Light-1_1_1m.msi
+  curl -O https://slproweb.com/download/Win64OpenSSL_Light-1_1_1m.exe
   :: Run the installer.
-  .\Win64OpenSSL_Light-1_1_1m.msi
+  .\Win64OpenSSL_Light-1_1_1m.exe
 )
 
 :: Return to the root of the repository.

tools/Windows_dependencies_setup_MinGW.sh

@@ -0,0 +1,97 @@
+#!/bin/sh
+#  SPDX-License-Identifier: MIT
+#
+#  EmulationStation Desktop Edition
+#  Windows_dependencies_setup_MinGW.sh
+#
+#  Downloads and prepares the external dependencies for building in-tree.
+#  If the directories already exist they will be removed and the libraries will be downloaded again.
+#
+#  This script needs to run from the root of the repository.
+#
+
+if [ ! -f .clang-format ]; then
+  echo "You need to run this script from the root of the repository."
+  exit
+fi
+
+echo -e "Setting up dependencies in the ./external directory..."
+
+cd external
+
+echo -e "\nSetting up cURL"
+rm -rf curl-*
+
+curl -O https://curl.se/windows/dl-7.80.0_2/curl-7.80.0_2-win64-mingw.zip
+unzip curl-7.80.0_2-win64-mingw.zip
+cp -p curl-7.80.0-win64-mingw/bin/libcurl-x64.dll ..
+
+echo -e "\nSetting up GLEW"
+rm -rf glew-*
+
+curl -LO https://sourceforge.net/projects/glew/files/glew/2.1.0/glew-2.1.0.zip
+unzip glew-2.1.0.zip
+
+echo -e "\nSetting up FreeType"
+rm -rf freetype
+
+git clone https://github.com/freetype/freetype.git
+cd freetype
+git checkout VER-2-11-0
+mkdir build
+cd ..
+
+echo -e "\nSetting up FreeImage"
+rm -rf FreeImage
+
+curl -LO https://downloads.sourceforge.net/project/freeimage/Binary%20Distribution/3.18.0/FreeImage3180Win32Win64.zip
+7z x FreeImage3180Win32Win64.zip
+cp -p FreeImage/Dist/x64/FreeImage.dll ..
+
+echo -e "\nSetting up pugixml"
+rm -rf pugixml
+
+git clone git://github.com/zeux/pugixml.git
+cd pugixml
+git checkout v1.11.4
+cd ..
+
+echo -e "\nSetting up SDL"
+rm -rf SDL2-*
+
+curl -O https://www.libsdl.org/release/SDL2-devel-2.0.18-mingw.tar.gz
+tar xvzf SDL2-devel-2.0.18-mingw.tar.gz
+mv SDL2-2.0.18/x86_64-w64-mingw32/include/SDL2 SDL2-2.0.18/
+cp -p SDL2-2.0.18/x86_64-w64-mingw32/lib/libSDL2main.a ..
+cp -p SDL2-2.0.18/x86_64-w64-mingw32/bin/SDL2.dll ..
+
+echo -e "\nSetting up FFmpeg"
+rm -rf ffmpeg-*
+
+curl -LO https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-n4.4-latest-win64-gpl-shared-4.4.zip
+unzip ffmpeg-n4.4-latest-win64-gpl-shared-4.4.zip
+cp -p ffmpeg-n4.4-latest-win64-gpl-shared-4.4/bin/avcodec-58.dll ..
+cp -p ffmpeg-n4.4-latest-win64-gpl-shared-4.4/bin/avfilter-7.dll ..
+cp -p ffmpeg-n4.4-latest-win64-gpl-shared-4.4/bin/avformat-58.dll ..
+cp -p ffmpeg-n4.4-latest-win64-gpl-shared-4.4/bin/avutil-56.dll ..
+cp -p ffmpeg-n4.4-latest-win64-gpl-shared-4.4/bin/postproc-55.dll ..
+cp -p ffmpeg-n4.4-latest-win64-gpl-shared-4.4/bin/swresample-3.dll ..
+cp -p ffmpeg-n4.4-latest-win64-gpl-shared-4.4/bin/swscale-5.dll ..
+
+echo -e "\nSetting up OpenSSL"
+
+if [ ! -f /c/Program\ Files/OpenSSL-Win64/libcrypto-1_1-x64.dll ]; then
+  curl -O https://slproweb.com/download/Win64OpenSSL_Light-1_1_1m.exe
+  # Run the installer.
+  ./Win64OpenSSL_Light-1_1_1m.exe
+fi
+
+# Return to the root of the repository.
+cd ..
+
+cp -p /c/Program\ Files/OpenSSL-Win64/libcrypto-1_1-x64.dll .
+cp -p /c/Program\ Files/OpenSSL-Win64/libssl-1_1-x64.dll .
+
+echo -e "\nCopying DLL files from Windows\System32"
+
+cp /c/Windows/System32/vcomp140.dll .