auctex: Installation
1.2 Installing AUCTeX
=====================
The modern and strongly recommended way of installing AUCTeX is by using
the Emacs package manager integrated in Emacs 24 and greater (ELPA).
Simply do 'M-x list-packages RET', mark the auctex package for
installation with 'i', and hit 'x' to execute the installation
procedure. That's all. This installation procedure has several
advantages. Besides being platform and OS independent, you will receive
intermediate releases between major AUCTeX releases conveniently. For
past ELPA releases, see <https://elpa.gnu.org/packages/auctex.html>.
Once the installation is completed, you can skip the rest of this
section and proceed to 
Quick Start.
The remainder of this section is about installing AUCTeX from a
release tarball or from a checkout of the AUCTeX repository.
Installing AUCTeX should be simple: merely './configure', 'make', and
'make install' for a standard site-wide installation (most other
installations can be done by specifying a '--prefix=...' option).
On many systems, this will already activate the package, making its
modes the default instead of the built-in modes of Emacs. If this is
not the case, consult Loading the package. Please read through
this document fully before installing anything. The installation
procedure has changed as compared to earlier versions. Users of
MS Windows are asked to consult Installation under MS Windows.
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auctex: Summary
auctex: Introduction
auctex: Quick Start