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Older versions of protobuf are apparently still what's provided with some current versions of some distributions. To avoid breaking the build on those distributions and to avoid an annoying deprecation warning on newer systems, check GOOGLE_PROTOBUF_VERSION to choose which to use. According to the CHANGES.txt file here: https://github.com/protocolbuffers/protobuf/blob/master/CHANGES.txt The new ByteSizeLong function was introduced in version 3.1.0 in 2016. Change-Id: I7f8eeda144bf9556d17d7a0a741996f3137b48b4 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/28287 Reviewed-by: Tommaso Marinelli <tommarin@ucm.es> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
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, SWIG, 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 the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/documentation/general_docs/building for more details and options. The basic source release includes these subdirectories: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - 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 will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.