> I'm trying to build ptolemy-0.7 using egcs-971105 glibc2.0.5. There > is no <std.h>. Is this standard or not? No, std.h is not standard, it is a libg++'ism. (I was responsible for putting that into Ptolemy years ago, but you probably want to replace uses of std.h with the appropriate standard headers, such as <stdlib.h> and <string.h>).