Linking SystemC on Windows with MinGW produces Error with QuickThreads

[Matthias Jung]

C:\Users\...\systemc\src\sysc\packages\qt\md\iX86_64.s: Assembler messages:
C:\Users\...\systemc\src\sysc\packages\qt\md\iX86_64.s:77: Error: junk at end of line, first unrecognized character is `-'
mingw32-make.exe[2]: *** [...\systemc\src\CMakeFiles\systemc.dir\build.make:1266: .../systemc/src/CMakeFiles/systemc.dir/sysc/packages/qt/md/iX86_64.s.obj] Error 1
mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:1006: .../systemc/src/CMakeFiles/systemc.dir/all] Error 2
mingw32-make.exe: *** [Makefile:129: all] Error 2

SystemC was build with CMAKE in the context of a CMAKE project. Under Linux and macOS its works, but on windows I get this assembler error shown above. It can be fixed by using pthreads but I think qt are much better. 

Commenting out the last 3 lines in the .s file helps:

//#if defined(__linux__) && defined(__ELF__)
//.section .note.GNU-stack,"",%progbits
//#endif

I assume that MinGW is still detected as linux.

Any ideas to fix it? 

[maehne]

Thanks for reporting this issue and analysing the cause! I have forwarded your report to the SystemC LWG. Could you please try to make the preprocessor condition more strict by adding "!defined(__MINGW32__)" (see here and here) and report back whether this fixes the issue?

[Philipp A Hartmann]

On MinGW, you would be supposed to use the Windows Fiber-based implementation, e.g. when using the Automake-based build. Maybe the CMake setup for SystemC fails to select this correctly for this compiler?

[maehne]

User @mo_ayman posted on 2020-07-15 on the SystemC forum about his effort to fix QuickThreads on Win64. He has created a branch on GitHub containing the current state of his fixes, which is based on SystemC 2.3.2.