如何在makefile中设置编译标志？(how do I set compilingflags in a makefile?)

我习惯在IDE中编程，但最近切换到vim和插件。现在我尝试为c ++项目编写一个makefile，但不知怎的，如果我运行make我总是得到错误

g++ -c -o *.o createOutput.cpp In file included from /usr/include/c++/4.8/thread:35:0, from createOutput.cpp:5: /usr/include/c++/4.8/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options. #error This file requires compiler and library support for the \ ^

这是我的makefile：

CC = clang++ # compiler flags CFLAGS = -O3 -Wall -Werror -std=c++11 CFLAGS_SFML = -lsfml-graphics -lsfml-window -lsfml-system all: program.exe clean program.exe: *.o $(CC) -o program.exe *.o $(CFLAGS) $(CFLAGS_SFML) getInput.o: getInput.cpp $(CC) -c getInput.cpp $(CFLAGS) createOutput.o: createOutput.cpp $(CC) -c createOutput.cpp $(CFLAGS) main.o: main.cpp $(CC) -c main.cpp $(CFLAGS) .PHONY: clean clean: rm *.o @echo clean done

我的错误在哪里？为什么使用g++而不是clang ？为什么不使用-std=c++11参数？对不起初学者的问题，遗憾的是我无法找到谷歌的解决方案。

I'm used to program in IDEs, but switched to vim and plugins recently. Now I try to write a makefile for a c++ project, but somehow if I run make I always get the error

g++ -c -o *.o createOutput.cpp In file included from /usr/include/c++/4.8/thread:35:0, from createOutput.cpp:5: /usr/include/c++/4.8/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options. #error This file requires compiler and library support for the \ ^

This is my makefile:

CC = clang++ # compiler flags CFLAGS = -O3 -Wall -Werror -std=c++11 CFLAGS_SFML = -lsfml-graphics -lsfml-window -lsfml-system all: program.exe clean program.exe: *.o $(CC) -o program.exe *.o $(CFLAGS) $(CFLAGS_SFML) getInput.o: getInput.cpp $(CC) -c getInput.cpp $(CFLAGS) createOutput.o: createOutput.cpp $(CC) -c createOutput.cpp $(CFLAGS) main.o: main.cpp $(CC) -c main.cpp $(CFLAGS) .PHONY: clean clean: rm *.o @echo clean done

Where is my error? Why is it using g++ instead of clang? And why isn't it using the -std=c++11 parameter? Sorry for the beginner questions, I unfortunately can't find a solution with google.

最满意答案

make试图制作目标'* .o'。

因此，您可以明确指定源列表：

CC = clang++ #compiler flags CFLAGS = -O3 -Wall -Werror -std=c++11 CFLAGS_SFML = -lsfml-graphics -lsfml-window -lsfml-system SRCS = getInput.cpp createOutput.cpp main.cpp OBJS = $(SRCS:.cpp=.o) all: program.exe program.exe: $(OBJS) $(CC) -o program.exe *.o $(CFLAGS) $(CFLAGS_SFML) getInput.o: getInput.cpp $(CC) -c getInput.cpp $(CFLAGS) createOutput.o: createOutput.cpp $(CC) -c createOutput.cpp $(CFLAGS) main.o: main.cpp $(CC) -c main.cpp $(CFLAGS) .PHONY : clean clean: rm *.o @echo clean done

注意变量OBJS和OBJS定义。

make tried to make target '*.o'.

So, instead of that, you can specify sources list explicitly:

CC = clang++ #compiler flags CFLAGS = -O3 -Wall -Werror -std=c++11 CFLAGS_SFML = -lsfml-graphics -lsfml-window -lsfml-system SRCS = getInput.cpp createOutput.cpp main.cpp OBJS = $(SRCS:.cpp=.o) all: program.exe program.exe: $(OBJS) $(CC) -o program.exe *.o $(CFLAGS) $(CFLAGS_SFML) getInput.o: getInput.cpp $(CC) -c getInput.cpp $(CFLAGS) createOutput.o: createOutput.cpp $(CC) -c createOutput.cpp $(CFLAGS) main.o: main.cpp $(CC) -c main.cpp $(CFLAGS) .PHONY : clean clean: rm *.o @echo clean done

Note definition of variables OBJS and SRCS.

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