I am not sure if I should delete the X Code as it takes a lot of space on MacBook. I want to use g++ compiler for compiling my c++ program.
It is possible to install just the Xcode command line tools. Open Terminal and execute xcode-select --install. This will get you your compiler (clang, not g++. g++ is just an alias for clang++ on Macs), linker, make, etc.
To actually answer your question, yes. If you install something and then uninstall it, the stuff that got installed will get uninstalled.
If you want the actual g++ compiler, you will need to install it yourself, homebrew is the easiest way. The gcc package will create versioned symlinks for you (g++-9), and you can just use that, or create another symlink that redirects g++ to g++-9. If you did that, you'll have to remember to manually update that symlink when the major version changes. All this is found in usr/local/bin after installing homebrew and the gcc package.
Related
How do I install the latest version of GCC on my macOS Big Sur. I am using Visual Studio Code, version 1.60 and I want to run C++ programs using it. I tried using homebrew to install GCC but it kept on giving me errors.
E.g.: When I typed in the path as /opt/homebrew/Cellar/gcc/11.2.0/bin
Result: zsh: permission denied: /opt/homebrew/Cellar/gcc/11.2.0/bin
What is wrong with the permission? How will I make it allow.
Firstly, /opt/homebrew/Cellar/gcc/11.2.0/bin is a directory, so you can't run that.
Secondly, homebrew generally makes symbolic links in /usr/local/bin for everything it installs, so you should add that to your PATH, e.g.
export PATH=/usr/local/bin:$PATH
Then you need to look in /usr/local/bin to see what program name you need, e.g.
ls /usr/local/bin/gcc*
and if you see gcc-11 in there, you then need to compile with:
gcc-11 program.c
Note you will need to look for g++* if you actually mean C++ rather than C.
I am currently running a debian Jessy whose g++'s version is 4.9. For some reason I need to compile a code in g++-4.7 or previous version.
I got the files of gcc-4.7 and g++-4.7 from a debian wheezy of a friend who has g++-4.7.
I tried to make the apt-get install, it seemed to have worked for the gcc but not for the g++. I put the files in the /bin, but he doesn't seem to locate the g++-4.7 package.
When I try to compile my code I specify g++-4.7 but get the error :
g++: error trying to exec 'cc1plus': execvp: No such file or directory
Any idea how to figure this out?
My advise is to add the wheezy repositories to /etc/apt/sources.list and then install g++-4.7 using apt-get. Using this method you will also get bugfixes etc.
I guess, currently you're just having dependency Problems. These will be solved when you use apt-get.
It is very easy to install gcc from sources. Remember that you have also to use a binutils version which maps to the gcc version. Mostly it is possible to run older gcc versions on actual binutils, but I have also seen a problem during install.
I have installed a long list of gcc versions in /opt/
Simply copy an older gcc version somewhere in the file system can result in problems with using the correct library versions.
If you install different gcc versions and also the related libraries e.g.libstdc++ , don't forget to update your library data base ( ldconfig/LD_LIBRARY_PATH/...) Maybe http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html can help.
i am new to linux and I have the following question:
I am trying to install MINGW in Ubuntu.
I ran the command:
sudo apt-get install mingw-w64
It was installed, and if i put the command gcc it runs ok. The problem is g++ command does not work. I guess it is because i don't have the c++ compiler (as I read in similar questions in stackoverflow).
I read too that you can use the next command:
mingw-get install g++
but i don't have the executable program for this command.
My question is, how can I install that executable? or is there another way to update my mingw so I can use the g++ compiler?
Hope I have explained myself correctly. Thank you for any help I receive.
mingw-get is a windows specific package manager, it is not needed when you use a native linux package manager such as APT.
Installing package mingw-w64 depends on package g++-mingw-w64, which depends on g++-mingw-w64-i686 and g++-mingw-w64-x86-64.
These packages install the mingw cross compilers as
/usr/bin/x86_64-w64-mingw32-g++-posix
/usr/bin/x86_64-w64-mingw32-g++-win32
/usr/bin/i686-w64-mingw32-g++-posix
/usr/bin/i686-w64-mingw32-g++-win32
Older versions of mingw cross compiler shipped /usr/bin/i586-mingw32msvc-c++, which is replaced by i686-w64-mingw32-c++-win32
You can usually use this toolchain in a project by running ./configure CXX=i686-w64-mingw32-c++-win32 or make CXX=i686-w64-mingw32-c++-win32
Note: the above description is correct for the most recent toolchain in Debian unstable. It may need some minor tweaking for older systems.
I want to compile C++ code on MacOS X, using the g++ compiler. How do I install it?
That's the compiler that comes with Apple's XCode tools package. They've hacked on it a little, but basically it's just g++.
You can download XCode for free (well, mostly, you do have to sign up to become an ADC member, but that's free too) here: http://developer.apple.com/technology/xcode.html
Edit 2013-01-25: This answer was correct in 2010. It needs an update.
While XCode tools still has a command-line C++ compiler, In recent versions of OS X (I think 10.7 and later) have switched to clang/llvm (mostly because Apple wants all the benefits of Open Source without having to contribute back and clang is BSD licensed). Secondly, I think all you have to do to install XCode is to download it from the App store. I'm pretty sure it's free there.
So, in order to get g++ you'll have to use something like homebrew (seemingly the current way to install Open Source software on the Mac (though homebrew has a lot of caveats surrounding installing gcc using it)), fink (basically Debian's apt system for OS X/Darwin), or MacPorts (Basically, OpenBSDs ports system for OS X/Darwin) to get it.
Fink definitely has the right packages. On 2016-12-26, it had gcc 5 and gcc 6 packages.
I'm less familiar with how MacPorts works, though some initial cursory investigation indicates they have the relevant packages as well.
Installing XCode requires:
Enrolling on the Apple website (not fun)
Downloading a 4.7G installer
To install g++ *WITHOUT* having to download the MASSIVE 4.7G xCode install, try this package:
https://github.com/kennethreitz/osx-gcc-installer
The DMG files linked on that page are ~270M and much quicker to install. This was perfect for me, getting homebrew up and running with a minimum of hassle.
The github project itself is basically a script that repackages just the critical chunks of xCode for distribution. In order to run that script and build the DMG files, you'd need to already have an XCode install, which would kind of defeat the point, so the pre-built DMG files are hosted on the project page.
Type g++(or make) on terminal.
This will prompt for you to install the developer tools, if they are missing.
Also the size will be very less when compared to xcode
Download Xcode, which is free with an ADC online membership (also free):
http://developer.apple.com/technology/xcode.html
xcode is now available for free from the app store. Just "buy it" (for free) and it will download. To get the command line tools go into preferences/downloads and "install command line compiler tools".
Instead of gcc you are using clang, but it works the same.
Here is how to do it on the newer mac chips and how to switch from clang(default) to g++
Install g++ through home-brew.
Check out the version you just installed, probably 12th or higher
You can make a symbolic link from g++-12 to g++
In order to do it, just type in your terminal:
sudo ln -s $(which g++-12) /usr/local/bin/g++.
Now open a new terminal and check your version again and you should see g++ instead of clang
g++ --version
So I am a new programmer and I just installed XCode on my Macbook to get the GCC. I think Xcode is the only way for getting GCC on OSX. Now when I run my Hello World application, in C++, g++ comes up saying it is version 4.0.1 but when I look for commands starting with g I also see g++-4.2. Is there any way of making 4.2 default rather than 4.0.1, and also is there a way to updating gcc to the latest version 4.4.0?
EDIT: Ok, so I installed macports and installed gcc4.4 and it shows up on terminal as gcc-mp-4.4 and how do I make it default with gcc_select, like what are the commands and stuff. Thanks.
If you install macports you can install gcc select, and then choose your gcc version.
/opt/local/bin/port install gcc_select
To see your versions use
port select --list gcc
To select a version use
sudo port select --set gcc gcc40
I know it is an old request. But it might still be useful to some. With current versions of MacPorts, you can choose the default gcc version using the port command.
To list the available versions of gcc, use:
$ sudo port select --list gcc
Available versions for gcc:
gcc42
llvm-gcc42
mp-gcc46
none (active)
To set gcc to the MacPorts version:
$ sudo port select --set gcc mp-gcc46
I'm just dropping in to say that using a soft link to accomplish this is a terrible, no-good, horrible idea.
One of the key things about writing software is reproduceability - you want to be able to get the same results every time. These systems are so complex that you want to reduce all invisible sources of error.
Having a soft link is an invisible source of error. It's the sort of thing you'll forget in a month, then move to a different machine, and wonder why you are getting different results - or, you'll try to upgrade your system, and you'll get weird errors because it's not expecting a softlink there.
Moreover, this isn't guaranteed to work - in particular, it's not clear that you will get the correct system include files, which have certainly changed between iterations of gcc.
gcc_select is a systematic way of doing the same thing which will work predictably, or in the very worst case you can file a bug report and get an eventual fix or fix it yourself.
Unfortunately :-( gcc_select does not affect which compiler XCode uses so it's not the way to go if you need to work in XCode (which I do). I still don't know what that way might be.
The following recipe using Homebrew worked for me to update to gcc/g++ 4.7:
$ brew tap SynthiNet/synthinet
$ brew install gcc47
Found it on a post here.
use "gcc_select -l"
>
gcc_select -l
gcc40 mp-gcc44
>
gcc_select mp-gcc44
You can have multiple versions of GCC on your box, to select the one you want to use call it with full path, e.g. instead of g++ use full path /usr/bin/g++ on command line (depends where your gcc lives).
For compiling projects it depends what system do you use, I'm not sure about Xcode (I'm happy with default atm) but when you use Makefiles you can set GXX=/usr/bin/g++ and so on.
EDIT
There's now a xcrun script that can be queried to select appropriate version of build tools on mac. Apart from man xcrun I've googled this explanation about xcode and command line tools which pretty much summarizes how to use it.
in /usr/bin type
sudo ln -s -f g++-4.2 g++
sudo ln -s -f gcc-4.2 gcc
That should do it.
You can install your GCC manually
either through
sudo port install gcc46
or your download the source code from one of the mirrors from here for example here
tar xzvf gcc-4.6.0.tar.gz
cd gcc-4.6.0
./configure
make
well if you have multiple version, then through you can choose one
port select --list gcc
remember port on mac is called macport https://www.macports.org/install.php and add add the bin into your path export PATH=$PATH:/opt/local/bin
Whatever Apple ships as the default gcc in xcode (4.2.1 on 10.6, 4.0.1 before) is well tested (and maintained) by the apple guys and the "standard" to build software with on OS X. Everything else is not, so think twice if you want to develop software, or be gcc/OS X beta tester.