diff -Naur subversion-1.8.0-orig/build/ac-macros/apache.m4 subversion-1.8.0/build/ac-macros/apache.m4
--- subversion-1.8.0-orig/build/ac-macros/apache.m4	2013-04-30 08:01:28.000000000 +0400
+++ subversion-1.8.0/build/ac-macros/apache.m4	2013-06-24 09:18:54.663086000 +0400
@@ -141,7 +141,7 @@
     INSTALL_APACHE_MODS=true
 
     case $host in
-      *-*-cygwin*)
+      *-*-cygwin* | *-*-msys*)
         APACHE_LDFLAGS="-shrext .so"
         ;;
     esac
diff -Naur subversion-1.8.0-orig/build/ac-macros/sqlite.m4 subversion-1.8.0/build/ac-macros/sqlite.m4
--- subversion-1.8.0-orig/build/ac-macros/sqlite.m4	2013-04-20 08:00:52.000000000 +0400
+++ subversion-1.8.0/build/ac-macros/sqlite.m4	2013-06-24 10:09:37.107421900 +0400
@@ -256,7 +256,7 @@
 AC_DEFUN(_SVN_SQLITE_DSO_LIBS,
 [
   case $host_os in
-  beos* | mingw* | pw32* | cegcc* | cygwin*)
+  beos* | mingw* | pw32* | cegcc* | cygwin* | msys*)
     svn_sqlite_dso_ldflags=
     ;;
 
diff -Naur subversion-1.8.0-orig/build/config.guess subversion-1.8.0/build/config.guess
--- subversion-1.8.0-orig/build/config.guess	2013-06-13 13:07:11.000000000 +0400
+++ subversion-1.8.0/build/config.guess	2013-06-24 09:18:54.678711000 +0400
@@ -803,6 +803,9 @@
     i*:CYGWIN*:*)
 	echo ${UNAME_MACHINE}-pc-cygwin
 	exit ;;
+    i*:MSYS*:*)
+	echo ${UNAME_MACHINE}-pc-msys
+	exit ;;
     *:MINGW*:*)
 	echo ${UNAME_MACHINE}-pc-mingw32
 	exit ;;
@@ -843,6 +846,9 @@
     amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
 	echo x86_64-unknown-cygwin
 	exit ;;
+    amd64:MSYS*:*:* | x86_64:MSYS*:*:*)
+	echo x86_64-unknown-msys
+	exit ;;
     p*:CYGWIN*:*)
 	echo powerpcle-unknown-cygwin
 	exit ;;
diff -Naur subversion-1.8.0-orig/build/get-py-info.py subversion-1.8.0/build/get-py-info.py
--- subversion-1.8.0-orig/build/get-py-info.py	2009-11-16 22:07:17.000000000 +0300
+++ subversion-1.8.0/build/get-py-info.py	2013-06-24 09:18:54.709961000 +0400
@@ -101,7 +101,7 @@
       sysconfig.get_config_var('PYTHON'))
     add_option_if_missing(options, "-bundle_loader", python_exe)
 
-  elif sys.platform == 'cygwin' or sys.platform.startswith('openbsd'):
+  elif sys.platform == 'cygwin' or sys.platform == 'msys' or sys.platform.startswith('openbsd'):
 
     # Add flags to build against the Python library (also necessary
     # for Darwin, but handled elsewhere).
diff -Naur subversion-1.8.0-orig/configure.ac subversion-1.8.0/configure.ac
--- subversion-1.8.0-orig/configure.ac	2013-06-24 09:05:45.530273500 +0400
+++ subversion-1.8.0/configure.ac	2013-06-24 09:18:54.928711000 +0400
@@ -313,7 +313,7 @@
 dnl So we only turn it on for platforms where we know we really need it.
 AC_MSG_CHECKING([whether libtool needs -no-undefined])
 case $host in
-  *-*-cygwin*)
+  *-*-cygwin* | *-*-msys*)
     AC_MSG_RESULT([yes])
     LT_NO_UNDEFINED="-no-undefined"
     ;;
@@ -326,7 +326,7 @@
 
 AC_MSG_CHECKING([whether to avoid circular linkage at all costs])
 case $host in
-  *-*-cygwin*)
+  *-*-cygwin* | *-*-msys*)
     AC_MSG_RESULT([yes])
     AC_DEFINE([SVN_AVOID_CIRCULAR_LINKAGE_AT_ALL_COSTS_HACK], 1,
               [Define if circular linkage is not possible on this platform.])
diff -Naur subversion-1.8.0-orig/subversion/bindings/ctypes-python/test/remoterepos.py subversion-1.8.0/subversion/bindings/ctypes-python/test/remoterepos.py
--- subversion-1.8.0-orig/subversion/bindings/ctypes-python/test/remoterepos.py	2011-08-12 00:56:26.000000000 +0400
+++ subversion-1.8.0/subversion/bindings/ctypes-python/test/remoterepos.py	2013-06-24 09:18:54.928711000 +0400
@@ -175,7 +175,7 @@
             f.close()
         os.chmod(hook, S_IRWXU)
 
-        if sys.platform == "cygwin":
+        if sys.platform == "cygwin" or sys.platform == "msys":
             ### FIXME: When you try to set revprops, cygwin crashes
             ###        with a fatal error, so we skip this test for now.
             return
diff -Naur subversion-1.8.0-orig/subversion/bindings/swig/perl/native/Makefile.PL.in subversion-1.8.0/subversion/bindings/swig/perl/native/Makefile.PL.in
--- subversion-1.8.0-orig/subversion/bindings/swig/perl/native/Makefile.PL.in	2012-12-14 10:05:48.000000000 +0400
+++ subversion-1.8.0/subversion/bindings/swig/perl/native/Makefile.PL.in	2013-06-24 09:18:54.944336000 +0400
@@ -65,7 +65,7 @@
 # According to the log of r7937, the flags guarded by the conditional break
 # the build on FreeBSD if not conditionalized.
 my $apr_ldflags = '@SVN_APR_LIBS@'
-   if $^O eq 'darwin' or $^O eq 'cygwin';
+   if $^O eq 'darwin' or $^O eq 'cygwin' or $^O eq 'msys';
 
 chomp $apr_shlib_path_var;
 
diff -Naur subversion-1.8.0-orig/subversion/bindings/swig/python/tests/setup_path.py subversion-1.8.0/subversion/bindings/swig/python/tests/setup_path.py
--- subversion-1.8.0-orig/subversion/bindings/swig/python/tests/setup_path.py	2009-11-19 22:25:52.000000000 +0300
+++ subversion-1.8.0/subversion/bindings/swig/python/tests/setup_path.py	2013-06-24 09:18:54.944336000 +0400
@@ -39,7 +39,7 @@
 
 # OSes without RPATH support are going to have to do things here to make
 # the correct shared libraries be found.
-if sys.platform == 'cygwin':
+if sys.platform == 'cygwin' or sys.platform == 'msys':
   import glob
   svndir = os.path.normpath("../../../%s" % bld_swig_python_dir)
   libpath = os.getenv("PATH").split(":")
diff -Naur subversion-1.8.0-orig/subversion/tests/cmdline/commit_tests.py subversion-1.8.0/subversion/tests/cmdline/commit_tests.py
--- subversion-1.8.0-orig/subversion/tests/cmdline/commit_tests.py	2013-04-12 11:44:37.000000000 +0400
+++ subversion-1.8.0/subversion/tests/cmdline/commit_tests.py	2013-06-24 09:18:54.959961000 +0400
@@ -51,7 +51,7 @@
 #
 
 def is_non_posix_os_or_cygwin_platform():
-  return (not svntest.main.is_posix_os()) or sys.platform == 'cygwin'
+  return (not svntest.main.is_posix_os()) or sys.platform == 'cygwin' or sys.platform == 'msys'
 
 def get_standard_state(wc_dir):
   """Return a status list reflecting the local mods made by
@@ -1024,7 +1024,7 @@
 
   # Note: on Windows, files can't have angle brackets in them, so we
   # don't tests that case.
-  if svntest.main.windows or sys.platform == 'cygwin':
+  if svntest.main.windows or sys.platform == 'cygwin' or sys.platform == 'msys':
     angle_name = '_angle_'
     nasty_name = '#![]{}()__%'
   else:
diff -Naur subversion-1.8.0-orig/subversion/tests/cmdline/svntest/main.py subversion-1.8.0/subversion/tests/cmdline/svntest/main.py
--- subversion-1.8.0-orig/subversion/tests/cmdline/svntest/main.py	2013-06-24 09:10:09.858398500 +0400
+++ subversion-1.8.0/subversion/tests/cmdline/svntest/main.py	2013-06-24 10:12:05.326171900 +0400
@@ -278,7 +278,7 @@
 def get_admin_name():
   "Return name of SVN administrative subdirectory."
 
-  if (windows or sys.platform == 'cygwin') \
+  if (windows or sys.platform == 'cygwin' or sys.platform == 'msys') \
       and 'SVN_ASP_DOT_NET_HACK' in os.environ:
     return '_svn'
   else:
@@ -1329,8 +1329,11 @@
 def is_os_cygwin():
   return sys.platform == 'cygwin'
 
+def is_os_msys():
+  return sys.platform == 'msys'
+
 def is_fs_case_insensitive():
-  return (is_os_darwin() or is_os_windows() or is_os_cygwin())
+  return (is_os_darwin() or is_os_windows() or is_os_cygwin() or is_os_msys())
 
 def is_threaded_python():
   return True