macOS how to compile Obj-c file in terminal

[uaecasher]

hello, I'm reading the "Programming in Obj-C 2.0" book and I didn't understand how to compile the file using terminal.

any help?

thanks

 

[kainjow]

Assuming the file is called file.m and is located on the Desktop:

cd ~/desktop
gcc file.m -o file -framework Foundation

Then to run:

./file

They key thing is to name the file with a .m extension so it's compiled as Objective-C, and to remember to link to whatever frameworks you're using via the -framework argument.

 

[uaecasher]

I'm getting:

-bash: gcc: command not found

here is my code:

gcc Untitled.m -o Untitled -framework Foundation

the file name is Untitled and it's in Home directory

 

[kainjow]

Did you install Xcode?

 

[uaecasher]

yes i installed it and tried to build the same app and it worked

 

[mags631]

What does the following command in the Terminal output?

/usr/bin/gcc -v

And try this as well:

/Developer/usr/bin/gcc -v

 

[uaecasher]

strange, both give me no such directory

maybe because I'm using snow leopard? how can I install GCC?

 

[dejo]

how can I install GCC?

When you install Xcode, it installs gcc. You said you installed Xcode, right? What is in your /Developer directory? (i.e.: what does 'ls /Developer' say?)

 

[mags631]

strange, both give me no such directory

maybe because I'm using snow leopard? how can I install GCC?

Do you still have a partition with something other than Snow Leopard (e.g., Leopard)? Was XCode installed under a different version of Mac OS X (i.e., not Snow Leopard)?

 

[uaecasher]

here are screen shots

 

[uaecasher]

Do you still have a partition with something other than Snow Leopard (e.g., Leopard)? Was XCode installed under a different version of Mac OS X (i.e., not Snow Leopard)?

ya, i had leopard (which i think there is where I installed xCode) then i updated to snow leopard and before two days I added dual booting with leopard

 

[mags631]

ya, i had leopard (which i think there is where I installed xCode) then i updated to snow leopard and before two days I added dual booting with leopard

OK -- try this:

/Volumes/Loeprad\ HD/Developer/usr/bin/gcc -v

 

[uaecasher]

i get this :

-bash: /Volumes/Loeprad HD/Developer/usr/bin/gcc: No such file or directory

btw what if i delete the old xCode and download iPhone SDK (it include xCode 3.2) (mine is 3.1)

 

[mags631]

i get this :

-bash: /Volumes/Loeprad HD/Developer/usr/bin/gcc: No such file or directory

btw what if i delete the old xCode and download iPhone SDK (it include xCode 3.2) (mine is 3.1)

Reinstalling XCode under Snow Leopard should definitely help.

 

[rossipoo]

You must install the Command Line tools with XCode. They are optional.

 

[m3kilpat]

It would help if this:

/Volumes/Loeprad\ HD/Developer/usr/bin/gcc -v

had the correct spelling of Leopard.

 

[daracne]

Judging by the screenshots you posted, it looks like you have a ton of broken symlinks? I would try invoking the actual gcc binary directly by compiling with this command...

gcc-4.2 MyFile.m -framework Foundation

Or if you just want to verify that method would work, ask for the version number...

gcc-4.2 -v

If that works, then I would try uninstalling xcode completely and reinstalling it to see if it fixes those symlinks.

 

[mags631]

It would help if this:

/Volumes/Loeprad\ HD/Developer/usr/bin/gcc -v

had the correct spelling of Leopard.

That spelling was taken straight from his screenshot.

 

[uaecasher]

i solved the problem by reinstalling xCode

thanks for your help guys