Observed Behavior

make run-simple-system fails to compile simple program

ibex/examples/sw/simple_system/common/simple_system_common.c:40: Error: unrecognized opcode csrw minstret,x0', extension zicsr' required

Expected Behavior

make run-simple-system compiles simple program

Steps to reproduce the issue

Setup virtual environment

1. python -m venv ~/.ibex-eda/
2. . ~/.ibex-eda/bin/activate
3. pip install mako
4. pip install packaging

build system

1. . ~/.ibex-eda/bin/activate
2. git clone https://github.com/olofk/edalize.git
3. cd edalize
4. pip install .
5. cd ..
6. git clone https://github.com/lowRISC/fusesoc.git
7. cd fusesoc
8. pip install .
9. cd ..
10. git clone https://github.com/lowRISC/ibex.git
11. ./util/ibex_config.py small fusesoc_opts

--RV32E=0 --RV32M=ibex_pkg::RV32MFast --RV32B=ibex_pkg::RV32BNone --RegFile=ibex_pkg::RegFileFF --BranchTargetALU=0 --WritebackStage=0 --ICache=0 --ICacheECC=0 --ICacheScramble=0 --BranchPredictor=0 --DbgTriggerEn=0 --SecureIbex=0 --PMPEnable=0 --PMPGranularity=0 --PMPNumRegions=4 --MHPMCounterNum=0 --MHPMCounterWidth=40

13. ./util/check_tool_requirements.py
    INFO: Tool verilator present: Sufficiently recent version (found 5.028; needed 4.210) INFO: Tool edalize present: Sufficiently recent version (found 0.6.2.dev2+g1eedb7f; needed 0.2.0)

14. make build-simple-system

15. make run-simple-system

As a quick aside having the above steps would be helpful in the documentation.

No modifications to any sources.
No parameters set.

My Environment

Nothing special
riscv32-unknown-elf-gcc: gcc version 15.1.0 (Gentoo 15.1.0 p55)

Using Ibex as a micro controller in an FPGA

EDA tool and version:
Xilinx Vivado 2025.1

Operating system:
Gentoo

Version of the Ibex source code:
git master db07ab1

no modifications to source