--- Makefile.orig	2022-03-30 19:58:30.000000000 -0500
+++ Makefile	2022-04-30 15:52:35.521899000 -0500
@@ -8,10 +8,11 @@
 .PHONY: clean clobber help
 
 # build flags common to all options and architectures
-CXXFLAGS = -IArduinoLib -I. -g -O2 -Wall -DARDUINO=100 -pthread -std=c++0x
+CXXFLAGS ?= -g -O2 -Wall
+CXXFLAGS += -IArduinoLib -I. -DARDUINO=100 -std=c++0x
 LDXXFLAGS = -LArduinoLib -g -pthread
 LIBS = -lpthread -larduino
-CXX = g++
+CXX ?= g++
 
 
 # macOS does not have X11 by default; this assumes XQuartz has been installed
@@ -20,6 +21,11 @@
     LDXXFLAGS += -L/opt/X11/lib
 endif
 
+ifeq ($(shell uname -s), FreeBSD)
+    CXXFLAGS += -I$(LOCALBASE)/include
+    LDXXFLAGS += -L$(LOCALBASE)/lib
+    LIBS = -pthread -larduino -lexecinfo
+endif
 
 # FreeBSD needs libgpio
 ifeq ($(shell [ -r /usr/include/libgpio.h ]; echo $$?), 0)