From d5a986f460019a924627d79350552f446505cffb Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 6 Dec 2020 21:11:31 +0100
Subject: [PATCH] patch 8.2.2104: build problem with Ruby 2.7

Problem:    Build problem with Ruby 2.7.
Solution:   Adjust function declarations. (Ozaki Kiichi, closes #7430)
---
 src/auto/configure |  3 +--
 src/configure.ac   |  3 +--
 src/if_ruby.c      | 28 ++++++++++++++++++++--------
 3 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/src/auto/configure b/src/auto/configure
index c50f4bc..9a0c1e6 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -7590,8 +7590,7 @@ $as_echo "$rubyhdrdir" >&6; }
 	librubyarg=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig.expand($ruby_rbconfig::CONFIG['LIBRUBYARG'])"`
 	librubya=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig.expand($ruby_rbconfig::CONFIG['LIBRUBY_A'])"`
 	rubylibdir=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig.expand($ruby_rbconfig::CONFIG['libdir'])"`
-	if test -f "$rubylibdir/$librubya"; then
-	  librubyarg="$librubyarg"
+	if test -f "$rubylibdir/$librubya" || expr "$librubyarg" : "-lruby"; then
 	  RUBY_LIBS="$RUBY_LIBS -L$rubylibdir"
 	elif test "$librubyarg" = "libruby.a"; then
 	  	  librubyarg="-lruby"
diff --git a/src/configure.ac b/src/configure.ac
index f0e8371..e796d0e 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -1932,8 +1932,7 @@ if test "$enable_rubyinterp" = "yes" -o "$enable_rubyinterp" = "dynamic"; then
 	librubyarg=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig.expand($ruby_rbconfig::CONFIG[['LIBRUBYARG']])"`
 	librubya=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig.expand($ruby_rbconfig::CONFIG[['LIBRUBY_A']])"`
 	rubylibdir=`$vi_cv_path_ruby -r rbconfig -e "print $ruby_rbconfig.expand($ruby_rbconfig::CONFIG[['libdir']])"`
-	if test -f "$rubylibdir/$librubya"; then
-	  librubyarg="$librubyarg"
+	if test -f "$rubylibdir/$librubya" || expr "$librubyarg" : "-lruby"; then
 	  RUBY_LIBS="$RUBY_LIBS -L$rubylibdir"
 	elif test "$librubyarg" = "libruby.a"; then
 	  dnl required on Mac OS 10.3 where libruby.a doesn't exist
diff --git a/src/if_ruby.c b/src/if_ruby.c
index 68d5582..d0f8acf 100644
--- a/src/if_ruby.c
+++ b/src/if_ruby.c
@@ -1296,13 +1296,19 @@ vim_blob(VALUE self UNUSED, VALUE str)
 }
 
     static VALUE
-buffer_s_current(void)
+buffer_s_current(VALUE self UNUSED)
 {
     return buffer_new(curbuf);
 }
 
     static VALUE
-buffer_s_count(void)
+buffer_s_current_getter(ID id UNUSED, VALUE *x UNUSED)
+{
+    return buffer_new(curbuf);
+}
+
+    static VALUE
+buffer_s_count(VALUE self UNUSED)
 {
     buf_T *b;
     int n = 0;
@@ -1562,7 +1568,13 @@ get_win(VALUE obj)
 }
 
     static VALUE
-window_s_current(void)
+window_s_current(VALUE self UNUSED)
+{
+    return window_new(curwin);
+}
+
+    static VALUE
+window_s_current_getter(ID id UNUSED, VALUE *x UNUSED)
 {
     return window_new(curwin);
 }
@@ -1572,7 +1584,7 @@ window_s_current(void)
  *    SegPhault - 03/07/05
  */
     static VALUE
-line_s_current(void)
+line_s_current(VALUE self UNUSED)
 {
     return get_buffer_line(curbuf, curwin->w_cursor.lnum);
 }
@@ -1584,13 +1596,13 @@ set_current_line(VALUE self UNUSED, VALUE str)
 }
 
     static VALUE
-current_line_number(void)
+current_line_number(VALUE self UNUSED)
 {
     return INT2FIX((int)curwin->w_cursor.lnum);
 }
 
     static VALUE
-window_s_count(void)
+window_s_count(VALUE self UNUSED)
 {
     win_T	*w;
     int n = 0;
@@ -1790,8 +1802,8 @@ ruby_vim_init(void)
     rb_define_method(cVimWindow, "cursor", window_cursor, 0);
     rb_define_method(cVimWindow, "cursor=", window_set_cursor, 1);
 
-    rb_define_virtual_variable("$curbuf", buffer_s_current, 0);
-    rb_define_virtual_variable("$curwin", window_s_current, 0);
+    rb_define_virtual_variable("$curbuf", buffer_s_current_getter, 0);
+    rb_define_virtual_variable("$curwin", window_s_current_getter, 0);
 }
 
     void
-- 
2.13.7