[OT] Installing g++ compiler on ubuntu-12.04LTS

syphilis has asked for the wisdom of the Perl Monks concerning the following question:

Hi,

I'm interested in installing Inline::CPP on my ubuntu box.
Obviously I need g++ for that but, although gcc-4.6.3 is installed, I don't seem to have g++:

sisyphus@sisyphus5-desktop:~$ g++ -v
The program 'g++' can be found in the following packages:
 * g++
 * pentium-builder
Try: sudo apt-get install <selected package>
sisyphus@sisyphus5-desktop:~$
[download]

So I tried:

sisyphus@sisyphus5-desktop:~$ sudo apt-get install g++
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 g++:i386 : Depends: cpp:i386 (>= 4:4.6.3-1ubuntu5) but it is not goin
+g to be installed
            Depends: gcc:i386 (>= 4:4.6.3-1ubuntu5) but it is not goin
+g to be installed
            Depends: g++-4.6:i386 (>= 4.6.3-1~) but it is not going to
+ be installed
            Depends: gcc-4.6:i386 (>= 4.6.3-1~) but it is not going to
+ be installed
E: Unable to correct problems, you have held broken packages.
sisyphus@sisyphus5-desktop:~$
[download]

and I also tried:

sisyphus@sisyphus5-desktop:~$ sudo apt-get install pentium-builder
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package pentium-builder is not available, but is referred to by anothe
+r package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'pentium-builder' has no installation candidate
sisyphus@sisyphus5-desktop:~$
[download]

and (although I already have a very serviceable gcc-4.6.3 and make), I tried:

sisyphus@sisyphus5-desktop:~$ sudo apt-get install build-essential
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 build-essential : Depends: g++ (>= 4:4.4.3) but it is not installable
                   Depends: dpkg-dev (>= 1.13.5) but it is not going t
+o be installed
E: Unable to correct problems, you have held broken packages.
sisyphus@sisyphus5-desktop:~$
[download]

Any advice on how to install g++ ?

Cheers,
Rob

Comment on [OT] Installing g++ compiler on ubuntu-12.04LTS Select or Download Code

Replies are listed 'Best First'.
Re: [OT] Installing g++ compiler on ubuntu-12.04LTS by davido (Cardinal) on Sep 18, 2013 at 15:19 UTC
`sudo apt-get install g++` I've always thought this is silly, because g++ is really just a front-end for gcc. I guess the C++ libraries probably aren't loaded until g++ is installed, and the *nix-way is to keep things light weight so that the user only pays the price for those things he uses/wants/needs. Anyway, installing "`g++`" is the step I usually forget when setting up a new system, and so far, is the step that gets C++ working for me on Ubuntu systems. By the way, I'm starting to get more frequency in the FAIL reports on Inline::CPP where the problem shows up as a name-mangling issue, which is probably related to Inline::CPP failing to properly detect which libraries to use on the target system. That theory seems to have been accurate in those cases that I've been able to fix. But there are an increasing number of cases waiting to be fixed. If you (or anyone else here) notices a FAIL report and has an idea of what needs to happen to fix it, I'm open for suggestions. This cross-platform clean-install stuff is tricky for Inline::CPP, and I can use all the help I can get. :) Dave	[reply] [d/l] [select]
Re^2: [OT] Installing g++ compiler on ubuntu-12.04LTS by syphilis (Archbishop) on Sep 19, 2013 at 03:14 UTC
sudo apt-get install g++ Yeah, that was the first thing I tried. It's good to hear that should have worked. I'll take it to the Ubuntu forums as jfroebe has suggested. This cross-platform clean-install stuff is tricky for Inline::CPP I've just set up a powerpc64 box running Debian wheezy. It has g++ (version 4.6.3) but Inline::CPP is not building. It might be a PEBKAC - if it turns out to be other than that, you'll here from me ;-) It was the problem on the deb box that led me to try out Inline::CPP on the Ubuntu machine - whereupon I discovered (to my surprise) that g++ was not installed. Cheers, Rob	[reply]
Re^3: [OT] Installing g++ compiler on ubuntu-12.04LTS by davido (Cardinal) on Sep 19, 2013 at 16:53 UTC
Let me know what you find out regarding the g++ install. Is it possible that it's installed but not in your path? Whatever it is, I'd like to know just for my own selfish edification. Dave	[reply]
Re^4: [OT] Installing g++ compiler on ubuntu-12.04LTS by syphilis (Archbishop) on Sep 20, 2013 at 02:19 UTC
Re^5: [OT] Installing g++ compiler on ubuntu-12.04LTS by davido (Cardinal) on Sep 20, 2013 at 04:12 UTC
Some notes below your chosen depth have not been shown here
Re: [OT] Installing g++ compiler on ubuntu-12.04LTS by jfroebe (Parson) on Sep 18, 2013 at 14:39 UTC
Your best bet is to ask on the Ubuntu Forums rather than Perlmonks. Jason L. Froebe Blog, Tech Blog	[reply]
Re: [OT] Installing g++ compiler on ubuntu-12.04LTS ( apt-get install lib64stdc++6 ) by Anonymous Monk on Sep 20, 2013 at 10:37 UTC
debian m64 libstdc -> Debian -- Details of package libstdc++6 in sid -> http://packages.debian.org/lib64stdc++6 -> Debian -- Details of package lib64stdc++6 in sid So try apt-get install lib64stdc++6 then `g++ -m64` ought to work	[reply] [d/l]
Re^2: [OT] Installing g++ compiler on ubuntu-12.04LTS ( apt-get install lib64stdc++6 ) by syphilis (Archbishop) on Sep 21, 2013 at 00:38 UTC
So try apt-get install lib64stdc++6 Thanks Anonymous Monk. Running that command indicates that it was already installed and up to date. Closer inspection revealed that /usr/lib64/libstdc++.so.6.0.17 and a symlink to it (/usr/lib64/libstdc++.so.6) were already present. Creating another symlink (/usr/lib64/libstdc++.so) to the .so.6.0.17 object fixes my problem. I presume that's the right way to fix it ? Seems odd that the /usr/lib64/libstdc++.so symlink was not already present. I can now run g++ in either 64-bit mode or 32-bit mode, and can successfully build and install Inline-CPP-0.45 in either 32-bit or 64-bit builds of perl. (David, the correct g++ compiler and options are automatically set by the Inline-CPP Makefile.PL. It all now works fine for me.) Thanks, guys !! Cheers, Rob	[reply]
Re^3: [OT] Installing g++ compiler on ubuntu-12.04LTS ( apt-get install lib64stdc++6 ) by Anonymous Monk on Sep 21, 2013 at 00:46 UTC
Creating another symlink (/usr/lib64/libstdc++.so) to the .so.6.0.17 object fixes my problem. I presume that's the right way to fix it ? Seems odd that the /usr/lib64/libstdc++.so symlink was not already present. Yes, I think so (right way), and I also think it odd it didn't happen already -- but I've seen my share of almost-complete/correct binary packages :)	[reply]
Re: [OT] Installing g++ compiler on ubuntu-12.04LTS by Anonymous Monk on Sep 19, 2013 at 14:54 UTC
You probably have added some repositories that don't match the base system; you should remove them, `apt-get update` and retry. (It's been ages since I last ran across that error, so take this with a grain of salt)	[reply] [d/l]


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