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, 4 insertions, 82 deletions

diff --git a/src/nvim/message.h b/src/nvim/message.h
index 11029aa6fd..662ae9a6ae 100644
--- a/src/nvim/message.h
+++ b/src/nvim/message.h
@@ -1,85 +1,7 @@
 #ifndef NVIM_MESSAGE_H
 #define NVIM_MESSAGE_H
-/* message.c */
-int msg(char_u *s);
-int verb_msg(char_u *s);
-int msg_attr(char_u *s, int attr);
-int msg_attr_keep(char_u *s, int attr, int keep);
-char_u *msg_strtrunc(char_u *s, int force);
-void trunc_string(char_u *s, char_u *buf, int room, int buflen);
-void reset_last_sourcing(void);
-void msg_source(int attr);
-int emsg_not_now(void);
-int emsg(char_u *s);
-int emsg2(char_u *s, char_u *a1);
-void emsg_invreg(int name);
-char_u *msg_trunc_attr(char_u *s, int force, int attr);
-char_u *msg_may_trunc(int force, char_u *s);
-int delete_first_msg(void);
-void ex_messages(exarg_T *eap);
-void msg_end_prompt(void);
-void wait_return(int redraw);
-void set_keep_msg(char_u *s, int attr);
-void set_keep_msg_from_hist(void);
-void msg_start(void);
-void msg_starthere(void);
-void msg_putchar(int c);
-void msg_putchar_attr(int c, int attr);
-void msg_outnum(long n);
-void msg_home_replace(char_u *fname);
-void msg_home_replace_hl(char_u *fname);
-int msg_outtrans(char_u *str);
-int msg_outtrans_attr(char_u *str, int attr);
-int msg_outtrans_len(char_u *str, int len);
-char_u *msg_outtrans_one(char_u *p, int attr);
-int msg_outtrans_len_attr(char_u *msgstr, int len, int attr);
-void msg_make(char_u *arg);
-int msg_outtrans_special(char_u *strstart, int from);
-char_u *str2special_save(char_u *str, int is_lhs);
-char_u *str2special(char_u **sp, int from);
-void str2specialbuf(char_u *sp, char_u *buf, int len);
-void msg_prt_line(char_u *s, int list);
-void msg_puts(char_u *s);
-void msg_puts_title(char_u *s);
-void msg_puts_long_attr(char_u *longstr, int attr);
-void msg_puts_long_len_attr(char_u *longstr, int len, int attr);
-void msg_puts_attr(char_u *s, int attr);
-void may_clear_sb_text(void);
-void clear_sb_text(void);
-void show_sb_text(void);
-void msg_sb_eol(void);
-int msg_use_printf(void);
-#ifdef USE_MCH_ERRMSG
-void mch_errmsg(char *str);
-void mch_msg(char *str);
-#endif
-void msg_moremsg(int full);
-void repeat_message(void);
-void msg_clr_eos(void);
-void msg_clr_eos_force(void);
-void msg_clr_cmdline(void);
-int msg_end(void);
-void msg_check(void);
-int redirecting(void);
-void verbose_enter(void);
-void verbose_leave(void);
-void verbose_enter_scroll(void);
-void verbose_leave_scroll(void);
-void verbose_stop(void);
-int verbose_open(void);
-void give_warning(char_u *message, int hl);
-void msg_advance(int col);
-int do_dialog(int type, char_u *title, char_u *message, char_u *buttons,
-              int dfltbutton, char_u *textfield,
-              int ex_cmd);
-void display_confirm_msg(void);
-int vim_dialog_yesno(int type, char_u *title, char_u *message, int dflt);
-int vim_dialog_yesnocancel(int type, char_u *title, char_u *message,
-                           int dflt);
-int vim_dialog_yesnoallcancel(int type, char_u *title, char_u *message,
-                              int dflt);
-char_u *do_browse(int flags, char_u *title, char_u *dflt, char_u *ext,
-                  char_u *initdir, char_u *filter,
-                  buf_T *buf);
 
-#endif /* NVIM_MESSAGE_H */
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "message.h.generated.h"
+#endif
+#endif  // NVIM_MESSAGE_H