patch 8.2.0906: when setting 'termguicolors' SpellBad is no longer red Commit: https://github.com/vim/vim/commit/ea563cc22be043ff91dcbdf2878c3d1fd944e573 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jun 5 19:36:57 2020 +0200 patch 8.2.0906: when setting 'termguicolors' SpellBad is no longer red Problem: When setting 'termguicolors' SpellBad is no longer red. Solution: Only use the RGB guisp color for cterm when using the "underline" or "undercurl" attributes to avoid the background color to be cleared. Also make t_8u empty when the termresponse indicates a real xterm. (closes #6207)

[ The mve awk script was posted on the vimdev mailing list ]

From: jimmer@barney.mdhc.mdc.com (J. McGlasson)
Date: Mon, 31 Mar 1997 13:16:49 -0700 (Mar)

My compiler (SGI MIPSpro C compiler - IRIX 6.4) works like this.
I have written a script mve (make vim errors), through which I pipe my make
output, which translates output of the following form:

cfe: Error: syntax.c, line 4: Syntax Error
     int i[12;
 ------------^

into:

 cl.c, line 4, col 12 :  Syntax Error

(in vim notation:  %f, line %l, col %c : %m)

You might be able to tailor this for your compiler's output.