feature checking

vimrc

@@ -1017,7 +1017,9 @@ set wrapmargin=0
 set cursorline
 
 set foldcolumn=2
-set signcolumn=yes
+if has('patch-7-4-2201')
+  set signcolumn=yes
+endif
 set colorcolumn=80,120
 
 set iskeyword+=-
@@ -1077,7 +1079,9 @@ nnoremap <silent><space>ss :syntax sync fromstart<CR>
 
 "}}}
 "   terminal{{{
-tnoremap <Esc> <C-\><C-n>
+if has('terminal')
+  tnoremap <Esc> <C-\><C-n>
+endif
 "}}}
 "   git mappings {{{
 " also see vim-fugitive plugin section
@@ -1244,8 +1248,10 @@ if g:vimrc_auto_window_settings
       autocmd!
       autocmd WinEnter * call SetColorColumn()
       autocmd WinEnter * set cursorline | set cursorcolumn
-      autocmd WinLeave * setlocal colorcolumn=0
-      autocmd WinLeave * set nocursorline | set nocursorcolumn
+      if exists('##CmdLineEnter')
+        autocmd WinLeave * setlocal colorcolumn=0
+        autocmd WinLeave * set nocursorline | set nocursorcolumn
+      endif
     augroup END
 
 endif