Andrew> In both 21.5.10 and 21.4.12, MacOSX/Darwin needs to Andrew> include <string.h> in sysdll.h to get strcpy(). Aside from Andrew> adding: It looks to me like the "normal" way to get string.h is to #include lisp.h immediately after #include config.h. Low-level support that does not interface with Lisp otherwise seems to #include it directly. (fgrep string.h src/*.[ch] will demonstrate that this is common.) Therefore I would say that you should include it directly in modules that #include sysdll.h. I suspect order doesn't matter. If it is not obvious from your module code that strcpy is needed, then add a comment. Why is this sysdll.h-related? -- Institute of Policy and Planning Sciences http://turnbull.sk.tsukuba.ac.jp University of Tsukuba Tennodai 1-1-1 Tsukuba 305-8573 JAPAN Ask not how you can "do" free software business; ask what your business can "do for" free software.