From d35b46023a32c61297a5f9e539dc1d35039a74c3 Mon Sep 17 00:00:00 2001
From: moi15moi <moi15moismokerlolilol@gmail.com>
Date: Thu, 17 Jul 2025 18:33:32 -0400
Subject: [PATCH 1/2] Build code on MINGW64

---
 .github/workflows/ci.yml | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a672782752..6ee5bfcb13 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,12 +23,18 @@ jobs:
           - os: macos-latest
             cc: clang
             cxx: clang++
+          - os: windows-latest
+            cc: gcc
+            cxx: g++
 
     name: "Test (${{ matrix.os }}, ${{ matrix.cc }})"
     runs-on: ${{ matrix.os }}
     env:
       CC: ${{ matrix.cc }}
       CXX: ${{ matrix.cxx }}
+    defaults:
+      run:
+        shell: ${{ matrix.os == 'windows-latest' && 'msys2 {0}' || 'bash' }}
 
     steps:
     - uses: actions/checkout@v4
@@ -45,6 +51,15 @@ jobs:
       run: |
         brew update
         brew install autoconf automake libtool wget  ffmpeg
+    - name: Setup msys2
+      if: matrix.os == 'windows-latest'
+      uses: msys2/setup-msys2@v2
+      with:
+        msystem: MINGW64
+        install: >-
+          mingw-w64-x86_64-autotools
+          mingw-w64-x86_64-ffmpeg
+          mingw-w64-x86_64-toolchain
     - name: configure
       run: ./autogen.sh --enable-static --disable-shared
     - name: make

From 5b506b3521a0b2724016839877a9f30748e9f027 Mon Sep 17 00:00:00 2001
From: moi15moi <moi15moismokerlolilol@gmail.com>
Date: Thu, 17 Jul 2025 18:40:05 -0400
Subject: [PATCH 2/2] Add -municode flag to fix compilation on msys2

On msys2, when compiling, I was getting the error: undefined reference to `WinMain'

msys2 package patched have a similar fix: https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-ffms2/0001-ffmsindex-add-municode-ldflag.patch
---
 Makefile.am  | 3 +++
 configure.ac | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/Makefile.am b/Makefile.am
index 05631fda9c..644f3e14ca 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -56,6 +56,9 @@ include_HEADERS = $(top_srcdir)/include/ffms.h $(top_srcdir)/include/ffmscompat.
 
 bin_PROGRAMS = src/index/ffmsindex
 src_index_ffmsindex_SOURCES = src/index/ffmsindex.cpp
+if WINDOWS
+src_index_ffmsindex_LDFLAGS = -municode
+endif
 src_index_ffmsindex_LDADD = -lavutil src/core/libffms2.la
 
 .PHONY: test test-build test-clean test-sync test-run
diff --git a/configure.ac b/configure.ac
index b875b30911..79cb85dcee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,6 +58,8 @@ AS_CASE([$host],
             AC_ENABLE_SHARED
             AC_DISABLE_STATIC])
 
+AM_CONDITIONAL([WINDOWS], [case "$host_os" in mingw* | cygwin*) true ;; *) false ;; esac])
+
 AC_PROG_LIBTOOL
 
 if echo "$host" | $GREP "cygwin" >/dev/null 2>&1 && test "$enable_shared" = "yes"; then