make：c：找不到命令 [英] make: c: command not found

问题描述

我试图运行我的make文件，但我得到以下两个错误：

I am attempting to run my make file however i am getting the following two errors:

make：c：command not found

make: c: command not found

和

make：o：未找到命令

make: o: command not found

这里面cygwin。我有g ++并安装它，但是当我运行make文件我收到这些错误。

I am attempting to do this inside of cygwin. I have g++ and make installed on it, however when I run the make file I receive these errors.

任何想法？

makefile：

all: MergeSort clean

MergeSort: main.o MergeSort.o
    $g++ -o MergeSort main.o MergeSort.o

main.o: main.cpp MergeSort.h
    $g++ -c main.cpp

MergeSort.o: MergeSort.cpp MergeSort.h
    $g++ -c MergeSort.cpp

clean:
    rm -rf *o

cleanall:
    rm -rf *o *exe

推荐答案

您需要从 $ g ++ 行中删除 $ 。它试图扩展一些不存在的变量，并从你的命令吞下 $ g ++ - 。

You need to remove the $ from the $g++ lines. It's trying to expand some variable that doesn't exist, and is swallowing up the "$g++ -" from your commands.

使用变量的语法是：

$(CXX) -c main.cpp

在这种情况下， CXX 是C ++编译器的路径，这是为您定义的。您可以通过在makefile中添加以下行来更改它：

In this case, CXX is the path to the C++ compiler, which is defined for you. You can change it by adding the following line to your makefile:

CXX = g++

如果您试图避免回显命令make正在运行，请使用 @ $ 。

If you are trying to avoid echoing back the command make is running, use @ instead of $.

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