Add automatic generation of headers

- The 'stripdecls.py' script replaces declarations in all headers by includes to
  generated headers.
  `ag '#\s*if(?!ndef NEOVIM_).*((?!#\s*endif).*\n)*#ifdef INCLUDE_GENERATED'`
  was used for this.
- Add and integrate gendeclarations.lua into the build system to generate the
  required includes.
- Add -Wno-unused-function
- Made a bunch of old-style definitions ANSI

This adds a requirement: all type and structure definitions must be present
before INCLUDE_GENERATED_DECLARATIONS-protected include.

Warning: mch_expandpath (path.h.generated.h) was moved manually. So far it is
the only exception.

1 files changed, 3 insertions, 12 deletions

diff --git a/src/nvim/tag.h b/src/nvim/tag.h
index 91a2ebe849..9380199c31 100644
--- a/src/nvim/tag.h
+++ b/src/nvim/tag.h
@@ -12,17 +12,8 @@ typedef struct {
   void        *tn_search_ctx;
 } tagname_T;
 
-int do_tag(char_u *tag, int type, int count, int forceit, int verbose);
-void tag_freematch(void);
-void do_tags(exarg_T *eap);
-int find_tags(char_u *pat, int *num_matches, char_u ***matchesp,
-              int flags, int mincount,
-              char_u *buf_ffname);
-void free_tag_stuff(void);
-int get_tagfname(tagname_T *tnp, int first, char_u *buf);
-void tagname_free(tagname_T *tnp);
-int expand_tags(int tagnames, char_u *pat, int *num_file,
-                char_u ***file);
-int get_tags(list_T *list, char_u *pat);
 
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "tag.h.generated.h"
+#endif
 #endif /* NVIM_TAG_H */