Verilator testing is still broken on Mac

[gussmith23]

Verilator is becoming the bane of my existence

We are doing weird things on Mac though, using brew LLVM etc.

There's a chance Verilator should just work with default MacOS clang. I need to do more testing on this. With Lakeroad I could always get things to work, but it seems like I can't anymore.

[gussmith23]

For now I fixed this by modifying latest Verilator with the following:

diff --git a/configure.ac b/configure.ac
index d7621ac01..00d43d4ff 100644
--- a/configure.ac
+++ b/configure.ac
@@ -356,8 +356,8 @@ AC_SUBST(CFG_CXXFLAGS_PROFILE)
 # c++17 is the newest that Verilator is regularly tested to support
 # c++14 is the oldest that Verilator supports
 # gnu is required for Cygwin to compile verilated.h successfully
-#_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++20)
-#_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=c++20)
+_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++20)
+_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=c++20)
 _MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++17)
 _MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=c++17)
 _MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++14)
@@ -376,6 +376,7 @@ AC_SUBST(CFG_CXXFLAGS_WEXTRA)
 _MY_CXX_CHECK_SET(CFG_CXXFLAGS_COROUTINES,-fcoroutines-ts)
 _MY_CXX_CHECK_SET(CFG_CXXFLAGS_COROUTINES,-fcoroutines)
 _MY_CXX_CHECK_SET(CFG_CXXFLAGS_COROUTINES,-fcoroutines-ts -Wno-deprecated-experimental-coroutine)
+_MY_CXX_CHECK_SET(CFG_CXXFLAGS_COROUTINES,-std=gnu++20)
 AC_SUBST(CFG_CXXFLAGS_COROUTINES)
 
 # HAVE_COROUTINES

and then using that version over Homebrew's version.

[gussmith23]

Follow this issue: verilator/verilator#5190