Gabe Black 93bebf86cc scons,sim: Eliminate the generated cxx_config/init.cc file.
This file populated the "cxx_config_directory" map from type names to
directory entry generating types. It used a comprehensive list of
includes of all SimObject headers, and a comprehensive list of the
generating types to fill everything in.

Instead, this change creates a new singleton helper class which, when
instantiated as a static member of a CxxConfigParams subclass, will
install a pointer to a CxxConfigDirectoryEntry to that map during global
object construction time.

Also, this change renames the map to cxxConfigDirectory which is in
compliance with the style guide, and puts it behind an accessor which
returns a static variable which is the actual map. This avoids any
problems that might come from global object construction order.

Change-Id: Iaa913fbe5af1b11d90ca618e29420eeb7cb0faed
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/49455
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2022-01-13 05:21:41 +00:00
2020-10-22 01:01:46 +00:00
2020-07-14 18:41:37 +00:00
2017-03-01 11:58:37 +00:00
2021-09-23 23:14:55 +00:00

This is the gem5 simulator.

The main website can be found at http://www.gem5.org

A good starting point is http://www.gem5.org/about, and for
more information about building the simulator and getting started
please see http://www.gem5.org/documentation and
http://www.gem5.org/documentation/learning_gem5/introduction.

To build gem5, you will need the following software: g++ or clang,
Python (gem5 links in the Python interpreter), SCons, zlib, m4, and lastly
protobuf if you want trace capture and playback support. Please see
http://www.gem5.org/documentation/general_docs/building for more details
concerning the minimum versions of these tools.

Once you have all dependencies resolved, type 'scons
build/<CONFIG>/gem5.opt' where CONFIG is one of the options in build_opts like
ARM, NULL, MIPS, POWER, SPARC, X86, Garnet_standalone, etc. This will build an
optimized version of the gem5 binary (gem5.opt) with the the specified
configuration. See http://www.gem5.org/documentation/general_docs/building for
more details and options.

The main source tree includes these subdirectories:
   - build_opts: pre-made default configurations for gem5
   - build_tools: tools used internally by gem5's build process.
   - configs: example simulation configuration scripts
   - ext: less-common external packages needed to build gem5
   - include: include files for use in other programs
   - site_scons: modular components of the build system
   - src: source code of the gem5 simulator
   - system: source for some optional system software for simulated systems
   - tests: regression tests
   - util: useful utility programs and files

To run full-system simulations, you may need compiled system firmware, kernel
binaries and one or more disk images, depending on gem5's configuration and
what type of workload you're trying to run. Many of those resources can be
downloaded from http://resources.gem5.org, and/or from the git repository here:
https://gem5.googlesource.com/public/gem5-resources/

If you have questions, please send mail to gem5-users@gem5.org

Enjoy using gem5 and please share your modifications and extensions.
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