CODEWITHSUNDEEP
c++linuxfilemakefile
NewFile
NewFile

Reputation: 531

C++ makefile on Linux with Multiple *.cpp files

I'm trying to make a makefile with multiple files. Can someone help me? The files I have are file1.cpp, file2.h and main.cpp

file1.cpp contains my functions. file2.h contains the declaration of my functions.

main.cpp [includes file2.h in the code] file1.cpp [includes file2.h in the code]

i did 

all: main
gcc -g -Wall -o main main.cpp

but it gives me tons of bugs when i try to compile. my codes works perfectly fine on eclipse.

Upvotes: 10

Views: 27952

Answers (2)

torpedro
torpedro

Reputation: 504

you'll need to compile all .cpp files that you use (i assume they are not included somewhere). That way the compiler will know that file1.cpp and main.cpp are used together. Also I would suggest using g++ instead of gcc, because g++ is the specific c++ compiler while gcc supports C and C++.

Try using:

g++ -g -Wall -o main main.cpp file1.cpp

Also I would recommend to use Makefile variables like this:

SOURCES = main.cpp file1.cpp
g++ -g -Wall -o main $(SOURCES)

Hope this helps :)

Upvotes: 11

Brian Cain
Brian Cain

Reputation: 14619

but it gives me tons of bugs when i try to compile. my codes works perfectly fine on eclipse.

gcc is not a C++ compiler. Use g++ instead.

Your Makefile should look like so, it can leverage implicit rules:

all: main

CXXFLAGS+=-g -Wall
LDLIBS+=-lstdc++
main: file1.o main.o

Upvotes: 1

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