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These are no longer split out and shared in the root build/ directory. This does result in a small amount of overhead from building redundant copies of these files, although the overhead is not significant. When building 7 different variants of gem5, all the ISAs and NULL, the difference on my machine was: Before: real 41m25.372s user 914m22.266s sys 41m51.816s After: real 42m38.074s user 921m36.852s sys 43m2.949s This is about a 2-3% difference, which is a worse than typical case, since the overhead scales with the number of variants being built. The benefit of pulling ext/ into the variant directory is that there can now be a single config which applies to all files used to build gem5, and that config is represented by the variant of gem5 being built. Change-Id: I6f0db97c63a7f3e252e7e351aa862340978e701b Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56750 Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Gabe Black <gabe.black@gmail.com>
Overview
This repository is a redistribution of the Accellera SystemC 2.3.1 library [1]. This distribution replaces Accellera's Autoconf build system with a SCons build system, which is very useful for integration of SystemC in other SCons based projects, e.g., gem5 [2].
The repository contains all the source files from the Accellera distribution, but strips down the boost dependencies. All references to the boost library are replaced by calls to the C++11 STL. This repository also contains the TLM 2.0 protocl checker from Doulos [3].
Build
To build libsystemc-2.3.1.so, simply type scons. Optionally you can specify the number of jobs.
scons -j N
To build and link to SystemC from another SCons project, simply call the
SConscript located in src/. Be sure to add -std=c++11 to the CXXFLAGS of
your environment and to export the environment as 'env'. In case you build on
OS X, you will need to add -undefined dynamic lookup to your LINKFLAGS.
This is how a minimal SConstruct for your SystemC project could look:
env = Environment()
env.Append(CXXFLAGS=['-std=c++11'])
if env['PLATFORM'] == 'darwin':
env.Append(LINKFLAGS=['-undefined', 'dynamic_lookup'])
systemc = env.SConscript('<path_to_systemc>/src/SConscript', exports=['env'])
env.Program('example', ['example.cc', systemc])