This fixes the Cygwin build for me--it was failing because make-docfile couldn’t find a definition of IS_DIRECTORY_SEP. Why GCC is choosing not to inline IS_DIRECTORY_SEP is another question. src/ChangeLog addition: 2006-07-04 Aidan Kehoe <kehoea(a)parhasard.net&gt; * config.h.in: Don't declare inline macros as `extern' if we're building a standalone program, because their extern definitions in inline.c are unlikely to be included. XEmacs Trunk source patch: Diff command: cvs -q diff -u Files affected: src/config.h.in Index: src/config.h.in =================================================================== RCS file: /pack/xemacscvs/XEmacs/xemacs/src/config.h.in,v retrieving revision 1.108 diff -u -r1.108 config.h.in --- src/config.h.in 2006/04/23 16:11:32 1.108 +++ src/config.h.in 2006/07/04 13:49:39 ＠＠ -1066,7 +1066,7 ＠＠ Use `inline static' to define inline functions in .c files. See the Internals manual for examples and more information. */ -#if defined (__cplusplus) || ! defined (__GNUC__) +#if defined (__cplusplus) || ! defined (__GNUC__) || ! defined(emacs) # define INLINE_HEADER inline static #elif defined (DONT_EXTERN_INLINE_HEADER_FUNCTIONS) # define INLINE_HEADER inline -- Santa Maradona, priez pour moi!