use m4 directory for macros

Signed-off-by: Cristian Stoica <crististm@gmail.com>
autogenerated files

Signed-off-by: Cristian Stoica <crististm@gmail.com>
update notes

Signed-off-by: Cristian Stoica <crististm@gmail.com>
add m4 files
autogenerated files

Signed-off-by: Cristian Stoica <crististm@gmail.com>
some cleanup

Signed-off-by: Cristian Stoica <crististm@gmail.com>
don't ask for gcc

Signed-off-by: Cristian Stoica <crististm@gmail.com>
add note
fix configure stop on old gcc

Signed-off-by: Cristian Stoica <crististm@gmail.com>
test newer version of ax_cxx macro
give the correct option for macro

Signed-off-by: Cristian Stoica <crististm@gmail.com>
keep in m4 only patched files

Signed-off-by: Cristian Stoica <crististm@gmail.com>
update README.maint

Signed-off-by: Cristian Stoica <crististm@gmail.com>