--- configure.ac.old	2017-07-12 01:43:06.173521800 +0200
+++ configure.ac	2017-07-12 01:40:14.835392300 +0200
@@ -115,6 +115,28 @@
     ac_cv_func_malloc_0_nonnull=yes
     ac_cv_func_realloc_0_nonnull=yes
     ;;
+
+*Msys*)
+    WINDOWS=yes
+    MINGW=yes
+    platform=MinGW
+    portaudio=yes
+    portmidi=yes
+
+    # ASIO doesn't build yet with the autotools setup. We need to figure out how
+    # to make the final linking phase use g++
+    asio=yes
+
+    # externals are dynamically linked to pd.dll in their individual automake files
+    EXTERNAL_CFLAGS="-mms-bitfields"
+    EXTERNAL_LDFLAGS="-s -Wl,--enable-auto-import -no-undefined -lpd"
+    EXTERNAL_EXTENSION=dll
+
+    # workaround for rpl_malloc/rpl_realloc bug in autoconf when cross-compiling
+    ac_cv_func_malloc_0_nonnull=yes
+    ac_cv_func_realloc_0_nonnull=yes
+    ;;
+	
 *cygwin*)
     WINDOWS=yes
     CYGWIN=yes
@@ -140,6 +162,7 @@
 AM_CONDITIONAL(WINDOWS, test x$WINDOWS = xyes)
 AM_CONDITIONAL(CYGWIN, test x$CYGWIN = xyes)
 AM_CONDITIONAL(MINGW, test x$MINGW = xyes)
+AM_CONDITIONAL(MSYS, test x$MSYS = xyes)
 
 
 #########################################
--- configure.ac.old	2017-07-12 01:43:06.173521800 +0200
+++ configure.ac	2017-07-12 01:57:22.571764500 +0200
@@ -115,6 +115,28 @@
     ac_cv_func_malloc_0_nonnull=yes
     ac_cv_func_realloc_0_nonnull=yes
     ;;
+
+*msys*)
+    WINDOWS=yes
+    MINGW=yes
+    platform=MinGW
+    portaudio=yes
+    portmidi=yes
+
+    # ASIO doesn't build yet with the autotools setup. We need to figure out how
+    # to make the final linking phase use g++
+    asio=yes
+
+    # externals are dynamically linked to pd.dll in their individual automake files
+    EXTERNAL_CFLAGS="-mms-bitfields"
+    EXTERNAL_LDFLAGS="-s -Wl,--enable-auto-import -no-undefined -lpd"
+    EXTERNAL_EXTENSION=dll
+
+    # workaround for rpl_malloc/rpl_realloc bug in autoconf when cross-compiling
+    ac_cv_func_malloc_0_nonnull=yes
+    ac_cv_func_realloc_0_nonnull=yes
+    ;;
+	
 *cygwin*)
     WINDOWS=yes
     CYGWIN=yes
@@ -140,6 +162,7 @@
 AM_CONDITIONAL(WINDOWS, test x$WINDOWS = xyes)
 AM_CONDITIONAL(CYGWIN, test x$CYGWIN = xyes)
 AM_CONDITIONAL(MINGW, test x$MINGW = xyes)
+AM_CONDITIONAL(MSYS, test x$MSYS = xyes)
 
 
 #########################################