Ray> I wanted to build xemacs b43 in a different directory to test out a Ray> lesstif version. Ray> I created a lesstif directory inside of xemacs-21.2.43. cd to that Ray> directory and "configure --srcdir=.. <my other favorite options> ". Configure works, but while running make, gcc fails to Ray> compile lwlib.c because it can't find s/sol2.h and m/sparc.h. Do you really have ".." on your PATH? Does "../configure <my other favorite options>" work? Ray> This used to work in b40 or so, I think. Some software projects warn against making $builddir a subdir of $srcdir. Of course, maintainers generally build with srcdir and builddir completely separate.