[SOLVED] Error "You need a C++ compiler..." when installing Qt SDK on Mac

sierdzio

Install command line tools in addition to Xcode. I'm not an expert on mac, myself, but it might help. They are available (as a single package) on Apple's developer page.

sierdzio

Ah, I forgot - it's also possible, that you have to set your xcode folder with xcode-select. Best option: do both :)

wayfaerer

I ran terminal, and set the path using:

sudo xcode-select -switch /Applications/Developer

and it was successful (I think). But I tried to install the Qt SDK again and got the same error! Any other ideas?

sierdzio

Are you able to compile other, non-Qt code?

wayfaerer

Yep, I just opened XCode, created a C++ console project, and built Hello World successfully.

sierdzio

I mean compile in terminal. Xcode is probably setting up the environment in the background.

wayfaerer

Yeah, Terminal doesn't work. I think I misunderstood your first reply. When you said "command line tools" I thought you were talking about Terminal, since I tried searching the Mac app store for command line tools and didn't find anything. But now I realize it's just an add-on. I'll try installing it.

sierdzio

Yeah, those tools are not in App Store, they have to be downloaded separately. Okay then, maybe this time it works.

wayfaerer

That did the trick. Thanks, I really appreciate your help.

sierdzio

You're welcome :) Just to fulfill the bureaucracy, please add "[Solved]" to the beginning of the subject of this topic. I've already tagged it accordingly.

AndrewW

[quote author="wayfaerer" date="1335805077"] … I tried searching the Mac app store for command line tools and didn't find anything. But now I realize it's just an add-on. I'll try installing it.[/quote]

I'm glad that solved solved the problem!
Can you let me in on the secret of where to get these tools? I hope that I don't have to download Xcode again - that took nearly a day out here.

Dumb question. See the very first reply!!!!!

sierdzio

In new Xcode releases (>= 4.3) cmd line tools can be installed through Xcode Preferences window (although getting the package from dev page is still OK and valid ;)).

miroslav

For more details: http://www.agile-workers.com/web/2012/03/qt-qmake-osx_sdk-xcode

gustavosooeiro

Please help!

I have done all the steps here, but I still get the same error.
Does anyone can please help?!
I have been stuck on a couple of days with it ...

Thanks

sierdzio

Best way is of course to get a real OS like Linux or even Windows, if you feel masochistic.

Sorry, couldn't stop myself, but I don't like Mac OS. Jokes aside now, and onto your question: I think we need a bit more data. What have you set xcode-select path to? Which version of Xcode are you using (and which MacOS)? Is the situation the same as for wayfaerer, that is - Xcode compilation works, but command line fails?

gustavosooeiro

Yes, I think you are right. I might stick with Ubuntu to develop in C++.

I am still fighting with MacOS because I have a lot of friends that love Xcode, so I am still giving a try. But eventually (very soon) I might abandon MacOS for that!! :)

I am using Lion, and Xcode 4.4 with command line installed. I used the command:
sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

As I don't have experience with Xcode so I am not using it. I just wrote a little program using vi and complied using g++ and c++, through Terminal program.

This command line should be used inside XCode?

There is still hope for me? :0)

Thanks a lot!

sierdzio

Hm, so standard compilation works, yet you still can't install the SDK? I'm out of ideas, apart from one workaround: install Qt libraries and QtCreator separately, without using the SDK.

sierdzio

Oh, and be sure to use 4.8.2, as makespecs for xcode are not working with 4.8.1.

gustavosooeiro

Ok Gene! Thanks! I will follow your suggestion!