Unable to build gem5

[premiumfish]

Arch: RISCV, X86
Gem5 version: 24.01

Tried building using both Ubuntu, WSL and Docker
Commands(WSL):
scons build/X86/gem5.opt -j 4
scons build/RISCV/gem5.opt -j 4

Commands (Docker), using Dockerfile:

FROM ubuntu:20.04

# Install dependencies
RUN apt update && apt install -y \
    build-essential \
    python3-dev \
    libprotobuf-dev \
    protobuf-compiler \
    libgoogle-perftools-dev \
    scons \
    git

# Clone the gem5 repository
RUN git clone git clone https://github.com/gem5/gem5
WORKDIR /gem5

# Build gem5
CMD ["scons", "build/RISCV/gem5.opt", "-j2"]

docker build -t gem5-builder .
docker run --rm -it --memory=8g --cpus=4 gem5-builder

Get following output:

` [ TRACING]  -> RISCV/debug/Printf.hh
 [     CXX] RISCV/debug/Printf.cc -> .o
 [     CXX] RISCV/python/m5/defines.py.cc -> .o
 [     CXX] RISCV/python/m5/info.py.cc -> .o
 [     CXX] src/base/date.cc -> RISCV/base/date.o
 [    LINK]  -> RISCV/gem5.opt
collect2: fatal error: ld terminated with signal 9 [Killed]
compilation terminated.
scons: *** [build/RISCV/gem5.opt] Error 1
scons: building terminated because of errors.
*** Summary of Warnings ***
Warning: Header file <png.h> not found.
         This host has no libpng library.
         Disabling support for PNG framebuffers.
Warning: Deprecated namespaces are not supported by this compiler.
         Please make sure to check the mailing list for deprecation announcements.
Warning: Couldn't find HDF5 C++ libraries. Disabling HDF5 support.` 

Few debugging I did on my side but didnt help much

• Tried clearing cache and rebuilding
• Did a fresh clone of gem5 repository and rebuilt
• Reduce the number of parallel jobs
• Tried with debug and fast

and still get the same error

[abmerop]

My guess is you are running out of memory and the linker is being killed. You can confirm this by running dmesg and you would see something along the lines of "pid xyz killed by oom_reaper".

Not sure what could help here, but perhaps building the gem5.fast binary which is >10x smaller than gem5.opt.