Windows 发生错误：系统找不到指定的路径

运行mingw32 Make命令时，我遇到一个Make错误：

PS D:\> mingw32-make
cd src; mingw32-make
The system cannot find the path specified.
mingw32-make: *** [Makefile:4: all] Error 1

但是当我列出Makefile中列出的实际命令时，即

cd src；mingw32 make

，生成已成功完成

PS D:\> cd src; mingw32-make
g++ -std=c++17 -Wall -Wextra -Wpedantic -Wformat -Wchkp -I../include -c account.cpp
g++ -std=c++17 -Wall -Wextra -Wpedantic -Wformat -Wchkp -I../include -c customer.cpp
g++ -std=c++17 -Wall -Wextra -Wpedantic -Wformat -Wchkp -I../include -c display.cpp
g++ -std=c++17 -Wall -Wextra -Wpedantic -Wformat -Wchkp -I../include -c main.cpp
g++ -std=c++17 -Wall -Wextra -Wpedantic -Wformat -Wchkp -I../include -c passbook.cpp
g++ -std=c++17 -Wall -Wextra -Wpedantic -Wformat -Wchkp -I../include -c security.cpp
g++ -std=c++17 -Wall -Wextra -Wpedantic -Wformat -Wchkp -I../include -c staff.cpp
g++ -o Bank account.o customer.o display.o main.o passbook.o security.o staff.o

然而，当我在Ubuntu上使用Make构建时，这个问题并不存在

这是我的根目录中的Makefile：

DIR = src

all:
    cd $(DIR); mingw32-make

clean:
    cd $(DIR); mingw32-make clean

# Compiler options
# -std=c++17 enables ISO C++ 17 standard

CC = g++
CCFLAGS = -std=c++17 -Wall -Wextra -Wpedantic - 
Wformat -Wchkp

i = ../include

# LOCFLAGS used to set tell the compiler where to find a
# header that is not in the same directory as the source 
file itself
# LOCFLAGS will be set in directory level makefiles as 
needed

LOCFLAGS = -I../include

# The list of object files that can be made in this 
subdirectory
# is assigned to the make macro named $OBJECTS

OBJECTS = account.o customer.o display.o main.o 
passbook.o \
      security.o staff.o

# This rule says that the target named "all" depends on 
those
# files. Executing "make all" in this subdirectory will cause
# make to build the object files (.o) listed in the macro 
$OBJECTS
# and create an executable named "Bank" by linking them

all: $(OBJECTS)
    $(CC) -o Bank $(OBJECTS)

# rule that says how to make a .o object file from a .cpp 
source file
# for a given source file in a given directory you could 
compile it
# into an object file by executing "make filename.o"

# $< and $@ are macros defined by make
#     $< refers to the file being processed (i.e., compiled or 
linked )
#     $@ refers to the generated file

%.o: %.cpp
    $(CC) $(CCFLAGS) $(LOCFLAGS) -c $<

# target to clean up the object files, core files and 
executables
# executing "make clean" in this subdirectory will remove 
all
# files named core, "Bank" or any file ending in .o or 
.stackdump

clean:
    del $(OBJECTS) core *.stackdump Bank

这是我的src子目录中的Makefile：

DIR = src

all:
    cd $(DIR); mingw32-make

clean:
    cd $(DIR); mingw32-make clean

# Compiler options
# -std=c++17 enables ISO C++ 17 standard

CC = g++
CCFLAGS = -std=c++17 -Wall -Wextra -Wpedantic - 
Wformat -Wchkp

i = ../include

# LOCFLAGS used to set tell the compiler where to find a
# header that is not in the same directory as the source 
file itself
# LOCFLAGS will be set in directory level makefiles as 
needed

LOCFLAGS = -I../include

# The list of object files that can be made in this 
subdirectory
# is assigned to the make macro named $OBJECTS

OBJECTS = account.o customer.o display.o main.o 
passbook.o \
      security.o staff.o

# This rule says that the target named "all" depends on 
those
# files. Executing "make all" in this subdirectory will cause
# make to build the object files (.o) listed in the macro 
$OBJECTS
# and create an executable named "Bank" by linking them

all: $(OBJECTS)
    $(CC) -o Bank $(OBJECTS)

# rule that says how to make a .o object file from a .cpp 
source file
# for a given source file in a given directory you could 
compile it
# into an object file by executing "make filename.o"

# $< and $@ are macros defined by make
#     $< refers to the file being processed (i.e., compiled or 
linked )
#     $@ refers to the generated file

%.o: %.cpp
    $(CC) $(CCFLAGS) $(LOCFLAGS) -c $<

# target to clean up the object files, core files and 
executables
# executing "make clean" in this subdirectory will remove 
all
# files named core, "Bank" or any file ending in .o or 
.stackdump

clean:
    del $(OBJECTS) core *.stackdump Bank

#编译器选项
C++ -STD＝C++ 17实现ISO C++ 17标准
CC=g++
CCFLAGS=-std=c++17-Wall-Wextra-Wpedantic-
Wformat-Wchkp
i=../include
#用于设置的LOCFLAGS告诉编译器在何处查找
#与源不在同一目录中的头
文件本身
#LOCFLAGS将在目录级makefiles中设置为
需要
LOCFLAGS=-I../include
#可在此文件中创建的对象文件列表
子目录
#指定给名为$OBJECTS的make宏
对象=account.o customer.o display.o main.o
存折\
保安
#此规则表示名为“all”的目标依赖于
那些
#档案。在此子目录中执行“全部生成”将导致
#生成宏中列出的对象文件（.o）
$OBJECTS
#并通过链接它们来创建一个名为“Bank”的可执行文件
全部：$（对象）
$（CC）-o银行$（对象）
#说明如何从.cpp生成.o对象文件的规则
源文件
#对于给定目录中的给定源文件，您可以
编译它
#通过执行“makefilename.o”将文件转换为对象文件
#$<和$@是make定义的宏
#$<指正在处理的文件（即编译或
链接）
#$@引用生成的文件
%.o:%.cpp
$（CC）$（CCFLAGS）$（LOCFLAGS）-c$<
#目标清理对象文件、核心文件和
可执行文件
#在此子目录中执行“makeclean”将删除
全部的
#文件名为core，“Bank”或任何以.o结尾的文件，或
.堆垛机
清洁：
del$（对象）核心*.stackdump银行

在Windows上，您运行的是command.com shell，而不是POSIX shell。在command.com中，语法为

cd src；mingw32 make

不合法。例如，如果我在Windows系统上打开command.com终端，我会看到：

C:\Users\build> cd src; echo hi
The system cannot find the path specified.

在Windows command.com中，命令分隔符是单个

&

而不是分号

如果您想以便携方式更改目录，可以使用GNU make的

-C

选项。此外，应始终使用

$（MAKE）

变量，而不是手动写出MAKE命令：

all:
        $(MAKE) -C $(DIR)