After doing a build of emacs on Windows with MinGW (configure, make bootstrap,
.., make install) I found that then doing a make clean, make failed.

Specifically: there was an "access denied" message for temacs.exe during the
make step. (I'm new to building emacs on Windows but presumably a make clean,
make after the original build should work).

After a little poking around I discovered that the problem is that during the
build a dummy temacs.exe file is being created with only rw permissions (see
lib-src/makefile).

Later in the build, when temacs.exe is created from temacs.bin by using
addsection, apparently the permissions (rw) from the existing temacs.exe file
are kept thus resulting in a temacs.exe file without executable permission.

So: the simple fix I've done is to delete any existing temacs.exe file just
before using addsection to create the file.

The attachment with a fix is a diff -u against the current HEAD
src/makefile.w32-in (revision 1.56).

Bill Meier