File Not Found: cxxabi.h

Question

I am trying to compile the hello world program for PhASAR. I have installed LLVM version 10.0.1 on macOS 10.15.7 and set my environment flags as follows:

$ export CC=/usr/local/opt/llvm/bin/clang
$ export CXX=/usr/local/opt/llvm/bin/clang++
$ export PATH="/usr/local/opt/llvm/bin:$PATH"

And yet, when the makefile tries to run:

clang++ -std=c++14 -Wall -Wextra -O0 -pipe -g -rdynamic  `llvm-config --cppflags --ldflags` *.cpp `llvm-config --system-libs --libs all`  -o main

I get the error:

main.cpp:1:10: fatal error: 'cxxabi.h' file not found
#include <cxxabi.h>
         ^~~~~~~~~~
1 error generated.
make: *** [all] Error 1

How can I resolve this error and compile the example program?