Basic set of libraries in chroot (fedora linux) - linux

I'm running an old version of my linux distro (fedora, but this is not very relevant) and for reasons which are completely irrelevant I'm not in a position to update it. However I do need a newer version of gcc and some other libraries than those supplied by my old distro.
I could compile a newer gcc and all the other libraries of course but I thought the simplest way would be to install a minimal set of packages from the latest distro version to a directory and then just chroot there. This way I'd take advantage of the binary packages present in the newest distro and all the infrastructure around it (like dependency installation, etc.) and I wouldn't need to compile everything from source.
My question is this: if I only would like to be able to compile with the most recent gcc and run those programs, what is the minimal set of packages I need? Since we are talking about fedora, what is the minimal set of rpms (beyond glibc and gcc)? Note that I don't need any X environment, networking, or anything like that, only the most basic terminal tools.

The minimal set varies depending on your user needs and what you're linking with. What I do when making a chroot environment is have a look at the distro I want to chroot and see if they have a base rpm/deb package that kickstarts everything. Then I install that in the chroot. From there I add libraries and applications as needed.
For an example where I create a chroot for RHEL on Arch see http://www.zenskg.net/wordpress/?p=267

Related

How can I obtain a newer GCC? I don't have root, and can't compile it (memory error)

I have a shared account on a machine that is running an older version of GCC. I do not have root. When I try to compile GCC, my build process gets killed due to memory usage from the following command:
build/genattrtab ../../../work/gcc-6.1.0/gcc/common.md ../../../work/gcc-6.1.0/gcc/config/i386/i386.md insn-conditions.md \
-Atmp-attrtab.c -Dtmp-dfatab.c -Ltmp-latencytab.c
I'd really like to be able to compile some software on this machine that requires a newer GCC. Any suggestions are appreciated.
You can manually unpack one of the GCC packages for any major distribution, try to use the package that closely matches your distribution. These installable packages are just tar files with some meta data and install script. You can unpack them and extract binaries that you'll need. Just keep in mind that you might need to more than just gcc package. Some distributions chop their devtools into tons of small packages ( gcc, g++, binutils, gdb)
Another good source is to use pre-build gcc toolchain used by embedded vendors, sometimes these vendors include host version of gcc together with cross-compiler. For example Android NDK is one of such distributions.
Finally, you can compile GCC on another machine that is not so restrictive and copy the resulting binaries to your restrictive machine. As in case of the first approach of unpacking installable package, try to find machine that resembles your restrictive machine as close as possible. You can use tools like vagrant and docker to set-up close replica of your target machine. Vagrant and docker have a lot of pre-built templates that you can use as a jump start to create the machine you need.

how to compile apache,mysql and php in linux

I have never used Linux OS. Want to know how we can start compiling Apache,Mysql and php in Linux and is it necessary to configure it.
I tried doing it by using cd/user/scr/httpd_2.0.09
Do we need to downloads the set up from google
Do yourself a favour and don't try to compile your own webserver etc. ;)
Aside from the fact that it's a lot of work to set up the tools for compiling, resolve dependencies, and debug possible errors, you will have to do the same procedure with every tiny update – instead of simply getting a new version via your package manager.
If you use a common distribution, install the packages required for the so-called LAMP stack, and configure them properly. That will be hard enough for starters.
If you're using Ubuntu, have a look here: https://help.ubuntu.com/community/ApacheMySQLPHP
Actually installing binaries from repositories is less painful than compiling, but if you really want so, you may install Gentoo or other source-based distributive. I've simply described compilation of MySQL 5.5 in my blog.
To compile packages on Debian based systems you need to install build-essential and cmake package (and maybe some other *-dev packages, which appears to be missing during source configure).
For example to compile MySQL 5.5 it is enough to run:
cmake . #yep, with dot. Will prepare your source according to your system
make
make install #will install compiled binaries to system

How to install gcc onto a RedHat Enterprise 5 virtual machine?

I am trying to install gcc onto a linux RedHat Enterprise 5 virtual machine, and I have tried using a tar.gz package and also a rpm, and both methods give errors. The tar.gz says there is no c compiler found, and the rpm has dependencies that it can not find. Yum is available on this machine, however, there are no repositories found and I am still unsure of how to install the necessary repositories to get gcc installed. The end goal for installing gcc is to be able to install rsync, tcl, and the expect package for shell scripts. Any advice?
Your .tar.gz probably didn't work because it was the raw source code for GCC. The source for the compiler requires a compiler to build it — the classic chicken & egg problem. To get around this, you'd need to get a precompiled compiler for your system's architecture. GCC is not offered in a precompiled form by the FSF, as far as I know. If you're ever interested in actually trying to build a Linux system from the ground up like that, you might find Linux From Scratch interesting.
You'll probably not even need GCC to get rsync, tcl, etc. There are almost certainly pre-built packages available from yum repos for those tools. As #PeteyT said, RHEL uses a subscription to allow you to access packages using yum. You can learn more from the Red Hat Subscription Management Guide.
If you don't have a Red Hat subscription, you might be interested in CentOS, Scientific Linux and Fedora. As I understand it, CentOS and Scientific Linux are meant to be almost identical to RHEL. On the other hand, Fedora is a separate project owned by Red Hat (according to Wikipedia) which is an OS in its own right, and sometimes serves as a feeder to Red Hat products.
Once you have repos available, either via subscription or switching OSs, you should be able to simply run yum install rsync tcl expect to install rsync, tcl, and expect.
You might look at yum's docs for more about the various commands you can use with yum, and Red Hat's docs for more on package management in RHEL.

Port a debian package to YUM for CentOS

I have a project that runs on Debian and uses many packages provided from the Debian repositories.
Because of demand, I've looked into porting the project to CentOS, but found that many of the packages I require are completely missing - at least 10 dependencies would have to be compiled manually at install time on the users machine.
My question is, what is the best way to create an installer for the user's machine? Should I use automake tools (with the standard ./configure, make, make install), to compile the required libraries, or is this a non-standard approach. Note that my app doesn't actually need to be compiled since it is written in Python, so is it weird to do a "make", when you're not compiling your own app?
Should the configure script just warn the user that package X is missing, and let them handle the rest?
Should I roll my own dependency checker by runng pkg-config manually a few times for each library required, and exit if something is missing?
I'm quite new to this, so any tips to get me moving in the right direction are appreciated.
Edit: I am familiar with RPM and yum for red hat base distros, but CentOS is missing many multimedia packages that I require. An example of one of my package dependencies is "liquidsoap" which is a programmable audio engine: http://savonet.sourceforge.net/
This is available on Debian, but not Redhat/Centos
See this link on CentOS package management.
http://wiki.centos.org/PackageManagement/Yum
CentOS is redhat based and does not use .deb packages by default. However apt package management has been ported to tons of platforms, you may be able to use a port for centOS
If you use YUM whatever packages you need will be there for your application as redhat distros need all the same things that any other distro does.
EDIT: To get the details out of comments
Packages not available on the target platform either have to be built (possibly as a port) on the target platform and then shipped in the ported package (in this case YUM), or code needs to be modified and forked to use packages which already are available on the target platform. The choice depends on which is worse, or which is even possible given your constraints.

Compile for CentOS on Ubuntu

Can I install an older version of gcc/g++ (4.1.3) on the latest Ubuntu (which comes with 4.4.3) and use it to compile a .so which should run on CentOS? The binary compiled with the Ubuntu version of gcc fails to load on CentOS because of missing imports (GLIB_2_11, ...). I need C++ (including exceptions), so I can't just statically link against glibc, which I already tried.
Can I install the older gcc without removing the newer one? How do I go about the libs required by the older gcc?
I'm currently developing code in CentOS, but it's such a pain to use. I really want to move to an Ubuntu desktop.
g++-4.1 is available for Ubuntu; just run apt-get install g++-4.1 then run g++-4.1 instead of g++. However, simply using an older compiler may not fix all of your library issues.
Like Joachim Sauer said, your best bet is to do your development on Ubuntu then do the final compilation on CentOS.
Even though you're using C++, static linking should still be an option. (However, you're much better off compiling on CentOS and using dynamic linking.)
Edit: A virtual machine is the most straightforward way to build on CentOS, but if you want to avoid the memory and CPU overhead of running a VM and don't care about differences between Ubuntu's and CentOS's kernel, then you can create a subdirectory containing a CentOS or Fedora filesystem and chroot do that to do your builds. This blog posting has details.

Resources