--- a/hgext/graphlog.py	Wed Jul 11 15:03:10 2012 -0700
+++ b/hgext/graphlog.py	Wed Jul 11 15:05:06 2012 -0700
@@ -471,7 +471,9 @@
         if filematcher is not None:
             revmatchfn = filematcher(ctx.rev())
         displayer.show(ctx, copies=copies, matchfn=revmatchfn)
-        lines = displayer.hunk.pop(rev).split('\n')[:-1]
+        lines = displayer.hunk.pop(rev).split('\n')
+        if not lines[-1]:
+            del lines[-1]
         displayer.flush(rev)
         edges = edgefn(type, char, lines, seen, rev, parents)
         for type, char, lines, coldata in edges:

--- a/setup.py	Wed Jul 11 15:03:10 2012 -0700
+++ b/setup.py	Wed Jul 11 15:05:06 2012 -0700
@@ -65,6 +65,7 @@
 from distutils.command.install_scripts import install_scripts
 from distutils.spawn import spawn, find_executable
 from distutils.ccompiler import new_compiler
+from distutils import cygwinccompiler
 from distutils.errors import CCompilerError, DistutilsExecError
 from distutils.sysconfig import get_python_inc
 from distutils.version import StrictVersion
@@ -429,6 +430,20 @@
     extmodules.append(Extension('mercurial.osutil', ['mercurial/osutil.c'],
                                 extra_link_args=osutil_ldflags))
 
+# the -mno-cygwin option has been deprecated for years
+Mingw32CCompiler = cygwinccompiler.Mingw32CCompiler
+
+class HackedMingw32CCompiler(cygwinccompiler.Mingw32CCompiler):
+    def __init__(self, *args, **kwargs):
+        Mingw32CCompiler.__init__(self, *args, **kwargs)
+        for i in 'compiler compiler_so linker_exe linker_so'.split():
+            try:
+                getattr(self, i).remove('-mno-cygwin')
+            except ValueError:
+                pass
+
+cygwinccompiler.Mingw32CCompiler = HackedMingw32CCompiler
+
 if sys.platform.startswith('linux') and os.uname()[2] > '2.6':
     # The inotify extension is only usable with Linux 2.6 kernels.
     # You also need a reasonably recent C library.

--- a/tests/test-glog.t	Wed Jul 11 15:03:10 2012 -0700
+++ b/tests/test-glog.t	Wed Jul 11 15:05:06 2012 -0700
@@ -2060,4 +2060,30 @@
   []
   []
 
+A template without trailing newline should do something sane
+
+  $ hg glog -r ::2 --template '{rev} {desc}'
+  o  2 mv b dir/b
+  |
+  o  1 copy a b
+  |
+
+Extra newlines must be preserved
+
+  $ hg glog -r ::2 --template '\n{rev} {desc}\n\n'
+  o
+  |  2 mv b dir/b
+  |
+  o
+  |  1 copy a b
+  |
+
+The almost-empty template should do something sane too ...
+
+  $ hg glog -r ::2 --template '\n'
+  o
+  |
+  o
+  |
+
   $ cd ..