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A flag, introduced in this patch: https://gem5-review.googlesource.com/c/public/gem5/+/68518 allowed users to pass "no-duplicate-sources" to a gem5 compilation to not symlink sources in the build directory. In this patch "src" was added as a shared top-level header directory. This means that the header files are not copied to the "build" directory whether or not "no-duplicate-sources" is set. This patch ensures the "src" directory is only added as a shared top-level headers directory in the case where "no-duplicate-sources" is set. In addition, the "duplicate_sources" parameter (the destination for the "no-duplicate-sources") was "None" by default, and only set to False when the flag was used. `default=True` has been added so "duplicate_sources" can be used as a boolean. This bug was a cause of a Nightly build error: https://jenkins.gem5.org/job/nightly/570 In this error, building ext/sst resulted in an error as the Makefile depends on adding "build/RISCV" to the include path. Without the header files in the "build" directory, building SST failed. Though, ext/stt should probably not be using header files in the "build/RISCV" directory. This will be fixed in another change. Change-Id: I786486a177fe17a67f3b939c539eecdcbfcaeaf2 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/69717 Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Maintainer: Bobby Bruce <bbruce@ucdavis.edu> 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, 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.