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llvm-mirror/docs/CommandGuide/index.rst
Rafael Espindola daa7f712a2 Remove the LLVM specific archive index.
Archive files (.a) can have a symbol table indicating which object
files in them define which symbols. The purpose of this symbol table
is to speed up linking by allowing the linker the read only the .o
files it is actually going to use instead of having to parse every
object's symbol table.

LLVM's archive library currently supports a LLVM specific format for
such table. It is hard to see any value in that now that llvm-ld is
gone:

* System linkers don't use it: GNU ar uses the same plugin as the
linker to create archive files with a regular index. The OS X ar
creates no symbol table for IL files, I assume the linker just parses
all IL files.

* It doesn't interact well with archives having both IL and native objects.

* We probably don't want to be responsible for yet another archive
format variant.

This patch then:

* Removes support for creating and reading such index from lib/Archive.
* Remove llvm-ranlib, since there is nothing left for it to do.

We should in the future add support for regular indexes to llvm-ar for
both native and IL objects. When we do that, llvm-ranlib should be
reimplemented as a symlink to llvm-ar, as it is equivalent to "ar s".

llvm-svn: 184019
2013-06-14 23:25:53 +00:00

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ReStructuredText

LLVM Command Guide
------------------
The following documents are command descriptions for all of the LLVM tools.
These pages describe how to use the LLVM commands and what their options are.
Note that these pages do not describe all of the options available for all
tools. To get a complete listing, pass the ``--help`` (general options) or
``--help-hidden`` (general and debugging options) arguments to the tool you are
interested in.
Basic Commands
~~~~~~~~~~~~~~
.. toctree::
:maxdepth: 1
llvm-as
llvm-dis
opt
llc
lli
llvm-link
llvm-ar
llvm-nm
llvm-prof
llvm-config
llvm-diff
llvm-cov
llvm-stress
llvm-symbolizer
Debugging Tools
~~~~~~~~~~~~~~~
.. toctree::
:maxdepth: 1
bugpoint
llvm-extract
llvm-bcanalyzer
Developer Tools
~~~~~~~~~~~~~~~
.. toctree::
:maxdepth: 1
FileCheck
tblgen
lit
llvm-build
llvm-readobj