commit https://github.com/vim/vim/commit/32d03b34ac8a34a962f57847fc431a2b4e14efea Author: Bram Moolenaar <Bram@vim.org> Date: Thu Nov 19 13:46:48 2015 +0100 patch 7.4.924 Problem: DEVELOPER_DIR gets reset by configure. Solution: Do not reset DEVELOPER_DIR when there is no --with-developer-dir argument. (Kazuki Sakamoto, closes #482)

# The most simplistic Makefile, for Cygnus 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