commit https://github.com/vim/vim/commit/864293abb72d62604d8d6b458addfb43c14230c3 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 2 13:40:04 2016 +0200 patch 7.4.1871 Problem: Appending to the quickfix list while the quickfix window is open is very slow. Solution: Do not delete all the lines, only append the new ones. Avoid using a window while updating the list. (closes #841)

# The most simplistic Makefile, for MinGW and Cygwin gcc on MS-DOS

ifndef USEDLL
USEDLL = no
endif

ifeq (yes, $(USEDLL))
DEFINES =
LIBS    = -lc
else
DEFINES =
LIBS    =
endif

CC = gcc
CFLAGS = -O2 -Wall -DWIN32 $(DEFINES)

ifneq (sh.exe, $(SHELL))
DEL = rm
else
DEL = del
endif

xxd.exe: xxd.c
	$(CC) $(CFLAGS) -s -o xxd.exe xxd.c $(LIBS)

clean:
	-$(DEL) xxd.exe