set variables as if the test was for c++

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

Signed-off-by: Cristian Stoica <crististm@gmail.com>
force testing with c++ ?
some say this works for c++ (maybe need a different file in m4/ folder?)
add autogenerated files

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

Signed-off-by: Cristian Stoica <crististm@gmail.com>
move pthread in its own folder

Signed-off-by: Cristian Stoica <crististm@gmail.com>
patch ax_pthread for c++

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

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

Signed-off-by: Cristian Stoica <crististm@gmail.com>
Merge branch 'autotools-fix-pthread-g++' into autotools