a couple changes to:
1) make sure CFLAGS and LDFLAGS are not overwritten link in bzip2.
2) load a modified src/Config/config.linux-fb file at src/config.
3) check explicitly for a PTHREAD macro instead of guessing around it.

--- a/src/Makefile.rules	2020-09-03 18:49:18.380000000 +0000
+++ b/src/Makefile.rules	2020-09-03 19:14:49.390000000 +0000
@@ -15,12 +15,12 @@
 #$(info MAKELEVEL $(MAKELEVEL))
 
 # Arch.rules will add platform-specific options to these flags
-CFLAGS=
+#CFLAGS=
 WARNINGS=
 # INCLUDEDIRS is += and EXTRAFLAGS= not here for their use in submakefiles before they include Makefile.rules
 INCLUDEDIRS += -I$(MW_DIR_SRC)/include
 #LDFLAGS = -L$(MW_DIR_LIB)
-LDFLAGS=
+LDFLAGS+= -lbz2
 DEFINES=
 HOSTCFLAGS=
 HOSTLDFLAGS=
--- a/src/include/lock.h	2020-09-03 21:09:41.110000000 +0000
+++ b/src/include/lock.h	2020-09-03 21:10:41.780000000 +0000
@@ -21,7 +21,7 @@
 #include <pthread.h>
 typedef pthread_mutex_t	MWMUTEX;
 
-#if ! (defined(__CYGWIN__) | RTEMS | MACOSX)
+#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
 /*
  * This definition doesn't require explicit initialization and -lpthread
  *
--- a/src/config	2020-09-03 18:49:18.380000000 +0000
+++ b/src/config	2020-09-03 21:18:25.370000000 +0000
@@ -2,6 +2,7 @@
 # config - Microwindows and Nano-X configuration file
 #
 # Set target architecture using ARCH= from options in Arch.rules
+# Set drawing method: X11 or FRAMEBUFFER/MOUSE/KEYBOARD options
 # Set SCREEN/MOUSE/KEYBOARD drivers (typically X11 or FB)
 # Set various libraries to build or include and their locations
 #
@@ -14,9 +15,9 @@
 # Target platform and compilation options
 #
 ####################################################################
-ARCH                     = MACOSX
-SHAREDLIBS               = Y
-SHAREDLINK               = Y
+ARCH                     = LINUX-NATIVE
+SHAREDLIBS               = N
+SHAREDLINK               = N
 #EXTRAFLAGS               = -Wall -Wno-missing-prototypes
 DEBUG                    = N
 OPTIMIZE                 = Y
@@ -30,14 +31,13 @@
 # Set SCREEN=X11 for X11, SCREEN=FB for framebuffer drawing
 # Screen size/depth for X11, FBE and non-dynamic framebuffer systems
 ####################################################################
-SCREEN                   = X11
-MOUSE                    =
-KEYBOARD                 =
+SCREEN                   = FB
+MOUSE                    = DEVMICEMOUSE
+KEYBOARD                 = SCANKBD
 SCREEN_WIDTH             = 1024
 SCREEN_HEIGHT            = 768
-X11LIBLOCATION           = /usr/X11/lib
-X11HDRLOCATION           = /usr/X11/include
-EXTENGINELIBS            +=
+#X11LIBLOCATION           = /usr/X11/lib
+X11HDRLOCATION           = ./X11-local
 
 ####################################################################
 #
@@ -46,19 +46,19 @@
 ####################################################################
 MICROWIN                 = Y
 NANOX                    = Y
-NUKLEARUI                = Y
+NUKLEARUI                = N
 NX11                     = Y
 ENGINE                   = N
-TINYWIDGETS              = Y
+TINYWIDGETS              = N
 
 ####################################################################
 #
 # Applications and demos to build
 #
 ####################################################################
-FBEMULATOR               = Y
+FBEMULATOR               = N
 MICROWINDEMO             = Y
-MICROWINMULTIAPP         = Y
+MICROWINMULTIAPP         = N
 NANOXDEMO                = Y
 HAVE_VNCSERVER_SUPPORT   = N
 VNCSERVER_PTHREADED      = N
@@ -97,7 +97,7 @@
 ####################################################################
 # JPEG support through libjpeg, see README.txt in contrib/jpeg
 ####################################################################
-HAVE_JPEG_SUPPORT        = N
+HAVE_JPEG_SUPPORT        = Y
 INCJPEG                  =
 LIBJPEG                  = -ljpeg
 
@@ -129,8 +129,8 @@
 ####################################################################
 HAVE_FREETYPE_2_SUPPORT  = Y
 HAVE_HARFBUZZ_SUPPORT    = N
-INCFT2LIB                = /usr/local/include
-LIBFT2LIB                = -lfreetype -lbz2
+INCFT2LIB                = /usr/include
+LIBFT2LIB                = -lfreetype
 #LIBFT2LIB                += -lharfbuzz
 FREETYPE_FONT_DIR        = "fonts/truetype"
 
@@ -198,10 +198,10 @@
 # set GRAYPALETTE to link with Gray Palette (valid only for 4bpp modes)
 # set HAVETEXTMODE=Y for systems that can switch between text & graphics.
 USE_EXPOSURE             = Y
-VTSWITCH                 = N
+VTSWITCH                 = Y
 FBREVERSE                = N
 GRAYPALETTE              = N
-HAVETEXTMODE             = N
+HAVETEXTMODE             = Y
 
 ####################################################################
 # Screen pixel format
@@ -229,8 +229,7 @@
 SCREEN_PIXTYPE           = MWPF_TRUECOLORARGB
 #SCREEN_PIXTYPE           = MWPF_TRUECOLORABGR
 #SCREEN_PIXTYPE           = MWPF_TRUECOLOR565
-#SCREEN_PIXTYPE           = MWPF_PALETTE
-SCREEN_DEPTH             = 8
+SCREEN_DEPTH             = 32
 
 ####################################################################
 # Screen drivers