Question about linux compiling with GCC

So, I have researched online, and looked at FAQ's, and nothing is giving me what I need. I am a windows / linux user. On windows, i have a very nifty program called "Bloodshed Dev-C++" which allows me to write the code, compile it, and run it all from one easy to use window. I am trying to move everything to linux, and am a little familiar with the OS, but cannot seem to figure out how to create, and compile, and finally run a C++ / C program. Here is what I thought was the correct way, and dident work.

pico project.c++

wrote the basic C++ Hello World program, saved and exited pico.

gcc project.c++

(here it made a project.o file, which was what i thought was the executable, but when i do this next step nothing happens.)

ls /../c

project.o

(nothing happens)

can anyone help me out? Maby a simple step by step set of instructions as how to write/compile/run a C/ C++ program?

The C++ compiler is generally called g++.

If you don't give a name for the executable (and you didn't), it should have created a file called "a.out"; unless you have an alias made for gcc? Type "alias" and see. I'm not aware of a system where the default is to stop at an object file, unless you give it the -c flag.

You have to have gcc installed.

Remember, file.cpp or file.h are nothing more than "text" files.

If you're gonna learn linux, you need to learn to compile from the command line.

Write up a simple "hello world" program and compile it from the command like:

Code:

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g++ -o program_name source_file.cpp

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After you've familiarized yourself with manually compiling from the command line, learn how to use make.

BTW: if you really want, you can run Dev C++ just fine under "Wine" for linux. although you'll need wine to run any executables you produce with it.

All Bloodshed Dev C++ does to compile your projects is use a makefile.

so, do u use a Text editor to write the program? such as "vi" or "pico" or "joe". for example

pico project1.c++

write the hello world, save / exit

g++ -o project1.c++ project1.cpp

then what?

Quote:

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Originally Posted by elsheepo

so, do u use a Text editor to write the program? such as "vi" or "pico" or "joe". for example

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anything you want

Quote:

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Originally Posted by elsheepo

g++ -o project1.c++ project1.cpp
then what?

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in the same directory run it like this:

Code:

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./project1.c++

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though, that's not a very good name for it.

BTW: I prefer geany, just a fancy text editor really.

g++ -o project1.c++ project1.cpp

when i do that linux tells me

"
g++: project1.cpp: No such file or directory
g++: no input files
"

are you running this command from the same directory you saved project1.cpp in?


i.e. if you saved project1.cpp to home/yourname/projects/project1/project1.cpp

you need to open a terminal and "cd ~/projects/project1"

then re-enter "g++ -o project1 project1.cpp"

i havent saved any file named "project1.cpp" here is what i have done

1. > pico project1.c++ (named the file)
2. > wrote a simple hello world program in C++, saved and exited pico.

now what?

Quote:

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Originally Posted by elsheepo

i havent saved any file named "project1.cpp" here is what i have done

1. > pico project1.c++ (named the file)
2. > wrote a simple hello world program in C++, saved and exited pico.

now what?

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well, where did it save that file?

okay, what linux distro are you using?

i.e. more inportantly what window manager are you using? (gnome, kde, etc.)

running: Slackware 12.0

/home/blacksheep/c/project1.c++

Quote:

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Originally Posted by elsheepo

g++ -o project1.c++ project1.cpp

when i do that linux tells me

"
g++: project1.cpp: No such file or directory
g++: no input files
"

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You've got this backwards, then: the thing following -o is the output file, and the thing all by itself (here project1.cpp) is the source code.

Note: if you expect anybody to follow along, remember the general rules: C++ source code files have extension "cpp", while (*nix) executables have the extension "" (that is, no extension at all). Therefore: your source code (the stuff you type) should be project1.cpp. You should type

Code:

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g++ -o project1 project1.cpp

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to turn that source code into the executable file "project1", which you can then run by typing

Code:

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./project1

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Edit: I suppose I should mention that the computer isn't going to care. But (above) is what people are going to expect.

i just found through my KDE Desktop that it comes with a tool KDevelop it says something about geany when i scroll over it. could this be the tool i need? Alltho i would still love to learn how to do it via command line

Quote:

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Originally Posted by elsheepo

running: Slackware 12.0

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yikes, you must be one of those super server buffs.

Quote:

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Originally Posted by elsheepo

/home/blacksheep/c/project1.c++

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go there and do what tabstop just told you.

Quote:

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Originally Posted by elsheepo

i just found through my KDE Desktop that it comes with a tool KDevelop it says something about geany when i scroll over it. could this be the tool i need? Alltho i would still love to learn how to do it via command line

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well we're trying to get you to compile this from the commmand line.

using a command-line editor like pico, vi, etc. is something different.

though I know at least vi has a debug interface built-in... (can't vouge for the others, I just don't know)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! IT WORKED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!

pico project1.cpp

write simple hello world program, save , exit

g++ -o helloworld.c++ project1.cpp

ls

./helloworld.c++

IT WORKED

Quote:

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Originally Posted by elsheepo

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! IT WORKED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!

pico project1.cpp

write simple hello world program, save , exit

g++ -o helloworld.c++ project1.cpp

ls

./helloworld.c++

IT WORKED

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yay! I share your excitement.

now, make sure make is installed, and figure that out.

Thank you both!!!! Man i hope i can be as 1337 coders are you two one day :)

Quote:

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Originally Posted by elsheepo

Thank you both!!!! Man i hope i can be as 1337 coders are you two one day :)

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I'm not a tough act to beat, but tabstop is really good!

Quote:

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Originally Posted by dudeomanodude

I'm not a tough act to beat, but tabstop is really good!

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I'd quote you in my sig but I'd rather quote you in my annual review. :)

Quote:

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Originally Posted by dudeomanodude

now, make sure make is installed, and figure that out.

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what exactly is "make" .... make shure "make" is installed? and figure that (that = make) out? did i read that right? im confused.

Quote:

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Originally Posted by elsheepo

what exactly is "make" .... make shure "make" is installed? and figure that (that = make) out? did i read that right? im confused.

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make is a tool for automated compilation, especially useful when you find yourself with multiple source files, since it will only compile the pieces that need to be recompiled. (Bloodshed-Dev C++ used it behind the scenes if you ever created a "project" in that IDE.)

hi elsheepo
I am using Kdevelop and I'm working very fine with that tool.
Anyway I'd suggest you to practice with gcc using the terminal before, expecially if you write simple programs.

Kdevelop uses gcc and make itself and makes all stuff easy for you, but it also generates a lot of configuration files once you create a new project, which will probably confuse your work, so it is useful only for large projects.

If you don't create a new project, but just new files, its editor is great to use, in my opinion.

Quote:

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i just found through my KDE Desktop that it comes with a tool KDevelop it says something about geany when i scroll over it. could this be the tool i need?

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KDevelop should be fine. There is also Anjuta, Code::Blocks, Eclipse and Netbeans, among others. If you want to use the same IDE on both Windows and Linux, Code::Blocks would be a good choice. Eclipse and Netbeans are also cross platform, but they are written in Java so you would need to install Java to use them.

Quote:

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Alltho i would still love to learn how to do it via command line

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tabstop has already given you a starting point. You can read the manual at the GCC homepage for more information, but it can be a little intimidating if you are really new to all this.