Verilator build fails with “requires a C++14 or newer compiler” due to hard-coded -std=gnu++11 #2641
Description
Is there an existing core-v-verif task for this?
- I have searched the existing task issues
Task Description
While building cv32e40p/sim/core testbench using Verilator (v5.040), the generated makefiles still compile with -std=gnu++11, even when newer compilers and flags are provided.
This causes the build to fail with:
/usr/local/share/verilator/include/verilatedos.h:281:3: error:
#error "Verilator requires a C++14 or newer compiler"
Environment:
Verilator: 5.040 (built with g++-11)
GCC: g++-11 (C++17 default)
Host: Ubuntu 24 / VirtualBox
Description of Done
Verilator builds should use a modern C++ standard (≥ C++14).
Either:
Allow overriding -std via Makefile variables (VERI_FLAGS, VERI_COMPILE_FLAGS, etc.), or
Pass --compiler-flags to Verilator instead of -CFLAGS so user-defined flags appear after internal defaults.