Trac #19189: update prerequisites

* Python is required
* Notes about redhat-derived distros

URL: http://trac.sagemath.org/19189
Reported by: vbraun
Ticket author(s): Volker Braun
Reviewer(s): Karl-Dieter Crisman, Jeroen Demeyer

src/doc/en/installation/source.rst

@@ -96,6 +96,7 @@ computer:
 - **perl**: version 5.8.0 or later.
 - **ar** and **ranlib**: can be obtained as part of GNU binutils.
 - **tar**: GNU tar version 1.17 or later, or BSD tar.
+- **python**: Python >= 2.6.
 
 Fortran and compiler suites
 ###########################
@@ -142,7 +143,12 @@ System-specific requirements
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 On Mac OS X, there are various developer tools needed which may require
-some registration on Apple's developer site; see :ref:`section_macprereqs`.
+some registration on Apple's developer site; see
+:ref:`section_macprereqs`.
+
+On Redhat-derived systems not all perl components are installed by
+default and you might have to install the **perl-ExtUtils-MakeMaker**
+package.
 
 On recent Debian or Ubuntu systems, the **dpkg-dev** package is needed for
 `multiarch <http://wiki.debian.org/Multiarch>`_ support.
@@ -182,13 +188,21 @@ distribution, but on a `Debian <http://www.debian.org/>`_ based system (e.g.
 you would use
 `apt-get <http://en.wikipedia.org/wiki/Advanced_Packaging_Tool>`_::
 
-     sudo apt-get install binutils gcc make m4 perl tar
+     # debian
+     sudo apt-get install binutils gcc make m4 perl tar git
 
+     # redhat
+     sudo yum install binutils gcc make m4 perl tar git perl-ExtUtils-MakeMaker
+     
 to install all general requirements, or, if you don't want Sage to build its
 own GCC::
 
-     sudo apt-get install binutils gcc g++ gfortran make m4 perl tar
+     # debian
+     sudo apt-get install binutils gcc g++ gfortran make m4 perl tar git
 
+     # redhat
+     sudo yum install binutils gcc gcc-c++ gcc-gfortran make m4 perl tar git perl-ExtUtils-MakeMaker
+     
 (This was tested on Ubuntu 12.04.2.)
 On other Linux systems, you might use
 `rpm <http://en.wikipedia.org/wiki/RPM_Package_Manager>`_,