Linux make: c: 命令未找到

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时间:2020-08-05 03:12:05  来源:igfitidea点击:

make: c: command not found

c++linuxmakefilecygwin

提问by Matt

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

我正在尝试运行我的 make 文件,但是我收到以下两个错误:

make: c: command not found

make: c: 命令未找到

and

make: o: command not found

make: o: 找不到命令

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.

我正在尝试在 cygwin 中执行此操作。我在上面安装了 g++ 和 make,但是当我运行 make 文件时,我收到了这些错误。

Any ideas?

有任何想法吗?

The makefile:

生成文件:

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

采纳答案by Daniel Gallagher

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.

您需要$$g++行中删除。它试图扩展一些不存在的变量,并$g++ -从你的命令中吞下“ ”。

The syntax for using a variable is:

使用变量的语法是:

$(CXX) -c main.cpp

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

在本例中,CXX是为您定义的 C++ 编译器的路径。您可以通过在 makefile 中添加以下行来更改它:

CXX = g++

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

如果您试图避免回显正在运行的命令,请使用@代替$

回答by Dirk

$g++ is not defined in that makefile, so the command becomes

$g++ 未在该 makefile 中定义,因此命令变为

-o MergeSort main.o MergeSort.o

and

-c main.cpp

Either drop the $ from $g++ and use g++, or define the variable in your makefile.

要么从 $g++ 中删除 $ 并使用 g++,要么在你的 makefile 中定义变量。

CXX = g++
all: MergeSort clean

MergeSort: main.o MergeSort.o
    $CXX -o MergeSort main.o MergeSort.o

main.o: main.cpp MergeSort.h
    $CXX -c main.cpp

MergeSort.o: MergeSort.cpp MergeSort.h
    $CXX -c MergeSort.cpp

clean:
    rm -rf *o

cleanall:
    rm -rf *o *exe