Using systemc-clang

After successfully compiling systemc-clang, it is possible to run the tool, but it requires several additional arguments. Assuming that the current path is in the directory that contains the systemc-clang binary, the tool can be run as follows.

$ ./systemc-clang test.cpp -- __STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS  \
-I<path-to-llvm-install>/lib/clang/10.0.0/include/ -I/usr/include -I$<path-to-systemc>/include \
-x c++ -w -c

It is important to note that systemc-clang requires the arguments to pass into it the location for the clang includes, and SystemC includes.

Useful scripts to execute systemc-clang

The distribution provides the following useful scripts to execute systemc-clang.

  • executes systemc-clang.

  • executes gdb with systemc-clang.

  • executes systemc-clang and generates SystemVerilog file.

Both of these scripts require setting some environment variables. Most of these are defined in the following scripts to make it easier for users. * A bash shell script to set the appropriate environment variables. * A fish shell script to set the appropriate environment variables.

Specifically, these scripts require the user to set the following variables. These can be changed in the file itself.

  • LLVM_INSTALL_DIR: This points to the directory where clang is installed.

  • SYSTEMC: This points to the directory where SystemC is installed.

  • SYSTEMC_CLANG: This is the cloned source repository.

  • SYSTEMC_CLANG_BUILD_DIR: This points to where systemc-clang was built.

Once the appropriate environment variables are set, the scripts used to run systemc-clang can be executed successfully.

$ scripts/ test.cpp

Also, one may generate the SystemVerilog file from C++ with the following command.

$ scripts/ test.cpp