I search three files(floatfns.c,math.h of glibc-961212-1f.src.rpm,math.h of glibc-2.0.6.tar.gz). Floatfns.c is no fail. Struct __exception in glibc-961212 is excanged to struct exception. Kaoru fukui k_fukui(a)highway.or.jp ================== math.h in glibc-2.0.7 ================== #ifdef __USE_SVID /* In SVID error handling, `matherr' is called with this description of the exceptional condition. We have a problem when using C++ since `exception' is reserved in C++. */ #ifdef __cplusplus struct __exception #else struct exception #endif { int type; char *name; double arg1; double arg2; double retval; }; #ifdef __cplusplus extern int __matherr __P ((struct __exception *)); extern int matherr __P ((struct __exception *)); #else extern int __matherr __P ((struct exception *)); extern int matherr __P ((struct exception *)); #endif ================ floatfns.c in Xemacs ================ #if defined (HAVE_MATHERR) && !defined(__cplusplus) int matherr (struct exception *x) { Lisp_Object args; if (! in_float) /* Not called from emacs-lisp float routines; do the default thing. */ return 0; /* if (!strcmp (x->name, "pow")) x->name = "expt"; */ args = Fcons (build_string (x->name), Fcons (make_float (x->arg1), ((in_float == 2) ? Fcons (make_float (x->arg2), Qnil) : Qnil))); switch (x->type) { case DOMAIN: Fsignal (Qdomain_error, args); break; case SING: Fsignal (Qsingularity_error, args); break; case OVERFLOW: Fsignal (Qoverflow_error, args); break; case UNDERFLOW: Fsignal (Qunderflow_error, args); break; default: Fsignal (Qarith_error, args); break; } return 1; /* don't set errno or print a message */ } #endif /* HAVE_MATHERR */