diff --git a/Makefile b/Makefile
index 9cdb8d2db..7c5cab8d3 100644
--- a/Makefile
+++ b/Makefile
@@ -31,6 +31,7 @@ SANITIZER =
 # SANITIZER = cfi
 
 
+OS := $(shell uname -s)
 PREFIX ?= /usr/local
 INSTALL_SUDO :=
 
@@ -216,6 +217,9 @@ endif
 
 ifeq ($(ENABLE_READLINE),1)
 CXXFLAGS += -DYOSYS_ENABLE_READLINE
+ifeq ($(OS), FreeBSD)
+CXXFLAGS += -I/usr/local/include
+endif
 LDLIBS += -lreadline
 ifeq ($(LINK_CURSES),1)
 LDLIBS += -lcurses
@@ -237,21 +241,33 @@ endif
 
 ifeq ($(ENABLE_PLUGINS),1)
 CXXFLAGS += $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG) --silence-errors --cflags libffi) -DYOSYS_ENABLE_PLUGINS
-LDLIBS += $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG) --silence-errors --libs libffi || echo -lffi) -ldl
+LDLIBS += $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG) --silence-errors --libs libffi || echo -lffi)
+ifneq ($(OS), FreeBSD)
+LDLIBS += -ldl
+endif
 endif
 
 ifeq ($(ENABLE_TCL),1)
 TCL_VERSION ?= tcl$(shell bash -c "tclsh <(echo 'puts [info tclversion]')")
+ifeq ($(OS), FreeBSD)
+TCL_INCLUDE ?= /usr/local/include/$(TCL_VERSION)
+else
 TCL_INCLUDE ?= /usr/include/$(TCL_VERSION)
+endif
 
 ifeq ($(CONFIG),mxe)
 CXXFLAGS += -DYOSYS_ENABLE_TCL
 LDLIBS += -ltcl86 -lwsock32 -lws2_32 -lnetapi32
 else
 CXXFLAGS += $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG) --silence-errors --cflags tcl || echo -I$(TCL_INCLUDE)) -DYOSYS_ENABLE_TCL
+ifeq ($(OS), FreeBSD)
+# FreeBSD uses tcl8.6, but lib is named "libtcl86"
+LDLIBS += $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG) --silence-errors --libs tcl || echo -l$(TCL_VERSION) | tr -d '.')
+else
 LDLIBS += $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKG_CONFIG) --silence-errors --libs tcl || echo -l$(TCL_VERSION))
 endif
 endif
+endif
 
 ifeq ($(ENABLE_GPROF),1)
 CXXFLAGS += -pg
diff --git a/README.md b/README.md
index 2a7a3b6ee..d5184bd7d 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,14 @@ Similarily, on Mac OS X MacPorts or Homebrew can be used to install dependencies
 	$ sudo port install bison flex readline gawk libffi \
 		git mercurial graphviz pkgconfig python36
 
+On FreeBSD use the following command to install all prerequisites:
+
+	# pkg install bison flex readline gawk libffi\
+		git mercurial graphviz pkgconfig python3 python36 tcl-wrapper
+
+On FreeBSD system use gmake instead of make. To run tests use:
+    % MAKE=gmake CC=cc gmake test
+
 There are also pre-compiled Yosys binary packages for Ubuntu and Win32 as well
 as a source distribution for Visual Studio. Visit the Yosys download page for
 more information: http://www.clifford.at/yosys/download.html
diff --git a/tests/tools/autotest.sh b/tests/tools/autotest.sh
index d0b0a89d7..31a6ae8ab 100755
--- a/tests/tools/autotest.sh
+++ b/tests/tools/autotest.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 libs=""
 genvcd=false