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When the internal utility function make_version_list sees a string, it tries to convert it into a list using the map() function. In python 3, that returns an iterator. The following call to zip() will consume those iterators, and then the following calls to len() will die because they don't work on map iterators. This is only a problem if all the common components of the version lists are equal, and the comparison needs to then check if one of the lists was equal to the other but with more components. When versions are equal, for instance when compiling with the oldest supported version of gcc (4.8.0) this error surfaces and breaks our scons build. A simple fix is to just wrap the call to map() with list() to convert the iterator to a flat list, making the other logic work as before. Change-Id: If9dc5cd7fff70c21229ac3dd9a017edeccd26148 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/28309 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.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.