Build issue at linking stage with pthread_atfork

[hsyedsplineai]

Hi,

I'm facing build issue with virtual simulator at linking stage.
The build of 'hw' and SystemC passed without any issue.

The error message on building 'vp' is pasted below. Can you suggest what is the solution. I also tried with '-pthread' option instead of '-lpthread' in the file 'vp/CMakeFiles/aarch64_toplevel.dir/link.txt' that didn't solve the issue.

The command and error messages is given below.

uname -a
*** 4.15.0-43-generic #46~16.04.1-Ubuntu SMP Fri Dec 7 13:31:08 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

The configuration Command:
cmake -DCMAKE_CXX_COMPILER=/home/syed/utils/gcc-4.9.3/bin/g++ -DCMAKE_INSTALL_PREFIX=build -DSYSTEMC_PREFIX=/usr/local/systemc-2.3.0/ -DNVDLA_HW_PREFIX=/home/syed/workdla/nvdla/hw -DNVDLA_HW_PROJECT=nv_full

The build:

make -j6
.....
[ 87%] Built target greenreg
Scanning dependencies of target nvdla
Scanning dependencies of target cosim_sc_wrapper
[ 87%] Building CXX object models/nvdla.build/CMakeFiles/nvdla.dir/src/adaptors/gp2str.cpp.o
[ 89%] Building CXX object models/nvdla.build/CMakeFiles/nvdla.dir/src/nvdla_top.cpp.o
[ 91%] Building CXX object models/nvdla.build/CMakeFiles/nvdla.dir/src/adaptors/gsgp2tlm.cpp.o
[ 91%] Building CXX object models/nvdla.build/CMakeFiles/nvdla.dir/src/adaptors/tlm2gsgp.cpp.o
[ 93%] Building CXX object models/nvdla.build/CMakeFiles/nvdla.dir/src/adaptors/irq_adaptor.cpp.o
[ 94%] Building CXX object fpga/aws-fpga/cosim_sc_wrapper.build/CMakeFiles/cosim_sc_wrapper.dir/src/nvdla_cosim_sc_wrapper.cpp.o
[ 94%] Building CXX object fpga/aws-fpga/cosim_sc_wrapper.build/CMakeFiles/cosim_sc_wrapper.dir/src/extmem_cosim_sc_wrapper.cpp.o
[ 96%] Building CXX object fpga/aws-fpga/cosim_sc_wrapper.build/CMakeFiles/cosim_sc_wrapper.dir/src/transactors/gsgp2cosim.cpp.o
[ 96%] Building CXX object fpga/aws-fpga/cosim_sc_wrapper.build/CMakeFiles/cosim_sc_wrapper.dir/src/transactors/irq2gss.cpp.o
[ 96%] Linking CXX shared library libnvdla.so
[ 96%] Built target nvdla
[ 98%] Linking CXX shared library libcosim_sc_wrapper.so
[ 98%] Built target cosim_sc_wrapper
Scanning dependencies of target aarch64_toplevel
[100%] Building CXX object CMakeFiles/aarch64_toplevel.dir/src/aarch64_toplevel.cpp.o
[100%] Linking CXX executable aarch64_toplevel
/home/syed/workdla/nvdla/vp/libs/qbox.build/aarch64-softmmu/libqbox-nvdla.so: undefined reference to `pthread_atfork'
collect2: error: ld returned 1 exit status
CMakeFiles/aarch64_toplevel.dir/build.make:95: recipe for target 'aarch64_toplevel' failed
make[2]: *** [aarch64_toplevel] Error 1
CMakeFiles/Makefile2:79: recipe for target 'CMakeFiles/aarch64_toplevel.dir/all' failed
make[1]: *** [CMakeFiles/aarch64_toplevel.dir/all] Error 2
Makefile:151: recipe for target 'all' failed
make: *** [all] Error 2