Eric Sunshine a dit: > Hello, Hi! So finally, some _real_ fun to find in Autoconf... Thanks... ;) I have not looked at your traces yet, but may I ask you to try the following m4 1.4? It is _not_ the regular 1.4, it is 1.4 + Debian patches. If it works for you, we will quickly wrap it as 1.4.1, or 1.5 whatever, and have Autoconf display a warning. Pay attention that once this m4 installed, it is the one that Autoconf ought to use: either install it from scratch, or setenv M4 to the new binary. http://www.lrde.epita.fr/~akim/download/m4-1.4.tar.gz