--- jbigkit-2.1.old/libjbig/Makefile
+++ jbigkit-2.1/libjbig/Makefile
@@ -4,9 +4,9 @@
 CC = gcc
 
 # Options for the compiler: A high optimization level is suggested
-CFLAGS = -g -O -W -Wall -ansi -pedantic # --coverage
+CFLAGS = -O2 -fPIC -Wall -ansi -pedantic
 
-all: libjbig.a libjbig85.a tstcodec tstcodec85
+all: libjbig.so libjbig85.so tstcodec tstcodec85
 
 tstcodec: tstcodec.o jbig.o jbig_ar.o
 	$(CC) $(CFLAGS) -o tstcodec tstcodec.o jbig.o jbig_ar.o
@@ -14,15 +14,13 @@
 tstcodec85: tstcodec85.o jbig85.o jbig_ar.o
 	$(CC) $(CFLAGS) -o tstcodec85 tstcodec85.o jbig85.o jbig_ar.o
 
-libjbig.a: jbig.o jbig_ar.o
-	rm -f libjbig.a
-	ar rc libjbig.a jbig.o jbig_ar.o
-	-ranlib libjbig.a
-
-libjbig85.a: jbig85.o jbig_ar.o
-	rm -f libjbig85.a
-	ar rc libjbig85.a jbig85.o jbig_ar.o
-	-ranlib libjbig85.a
+libjbig.so: jbig.o jbig_ar.o
+	rm -f libjbig.so
+	cc -shared -o libjbig.so jbig.o jbig_ar.o
+
+libjbig85.so: jbig85.o jbig_ar.o
+	rm -f libjbig85.so
+	cc -shared -o libjbig85.so jbig85.o jbig_ar.o
 
 jbig.o: jbig.c jbig.h jbig_ar.h
 jbig85.o: jbig85.c jbig85.h jbig_ar.h
--- jbigkit-2.1.old/pbmtools/Makefile
+++ jbigkit-2.1/pbmtools/Makefile
@@ -4,7 +4,7 @@
 CC = gcc
 
 # Options for the compiler
-CFLAGS = -g -O -W -Wall -Wno-unused-result -ansi -pedantic # --coverage
+CFLAGS = -O2 -Wall -ansi -pedantic -I../libjbig
 CPPFLAGS = -I../libjbig 
 
 .SUFFIXES: .1 .5 .txt $(SUFFIXES)
@@ -14,16 +14,16 @@
 
 txt: pbmtojbg.txt jbgtopbm.txt pbm.txt pgm.txt
 
-pbmtojbg: pbmtojbg.o ../libjbig/libjbig.a
+pbmtojbg: pbmtojbg.o ../libjbig/libjbig.so
 	$(CC) $(CFLAGS) -o pbmtojbg pbmtojbg.o -L../libjbig -ljbig
 
-jbgtopbm: jbgtopbm.o ../libjbig/libjbig.a
+jbgtopbm: jbgtopbm.o ../libjbig/libjbig.so
 	$(CC) $(CFLAGS) -o jbgtopbm jbgtopbm.o -L../libjbig -ljbig
 
-pbmtojbg85: pbmtojbg85.o ../libjbig/libjbig85.a
+pbmtojbg85: pbmtojbg85.o ../libjbig/libjbig85.so
 	$(CC) $(CFLAGS) -o pbmtojbg85 pbmtojbg85.o -L../libjbig -ljbig85
 
-jbgtopbm85: jbgtopbm85.o ../libjbig/libjbig85.a
+jbgtopbm85: jbgtopbm85.o ../libjbig/libjbig85.so
 	$(CC) $(CFLAGS) -o jbgtopbm85 jbgtopbm85.o -L../libjbig -ljbig85
 
 jbgtopbm.o: jbgtopbm.c ../libjbig/jbig.h
@@ -31,13 +31,13 @@
 jbgtopbm85.o: jbgtopbm85.c ../libjbig/jbig85.h
 pbmtojbg85.o: pbmtojbg85.c ../libjbig/jbig85.h
 
-../libjbig/libjbig.a: ../libjbig/jbig.c ../libjbig/jbig.h \
+../libjbig/libjbig.so: ../libjbig/jbig.c ../libjbig/jbig.h \
 	../libjbig/jbig_ar.c ../libjbig/jbig_ar.h
-	make -C ../libjbig libjbig.a
+	make -C ../libjbig libjbig.so
 
-../libjbig/libjbig85.a: ../libjbig/jbig85.c ../libjbig/jbig85.h \
+../libjbig/libjbig85.so: ../libjbig/jbig85.c ../libjbig/jbig85.h \
 	../libjbig/jbig_ar.c ../libjbig/jbig_ar.h
-	make -C ../libjbig libjbig85.a
+	make -C ../libjbig libjbig85.so
 
 analyze:
 	clang $(CPPFLAGS) --analyze *.c