diff -up jbigkit-2.1/libjbig/Makefile.ldflags jbigkit-2.1/libjbig/Makefile

--- jbigkit-2.1/libjbig/Makefile.ldflags	2018-02-27 17:50:15.786038149 +0100

+++ jbigkit-2.1/libjbig/Makefile	2018-02-27 17:55:44.042093437 +0100

@@ -10,19 +10,19 @@ PICFLAGS := -fPIC -DPIC

 all: libjbig.so.$(VERSION) tstcodec tstcodec85

 tstcodec: tstcodec.o libjbig.so

-	$(CC) $(CFLAGS) -o tstcodec $< -L. -ljbig

+	$(CC) $(CFLAGS) -o tstcodec $< -L. -ljbig $(LDFLAGS)

 tstcodec85: tstcodec85.o libjbig85.so

-	$(CC) $(CFLAGS) -o tstcodec85 $< -L. -ljbig85

+	$(CC) $(CFLAGS) -o tstcodec85 $< -L. -ljbig85 $(LDFLAGS)

 %.so: %.so.$(VERSION)

 	ln -sf $< $@

 libjbig.so.$(VERSION): jbig.o jbig_ar.o

-	$(CC) $(CFLAGS) -shared -Wl,-soname,$@ -o $@ $^

+	$(CC) $(CFLAGS) $(LDFLAGS) -shared -Wl,-soname,$@ -o $@ $^

 libjbig85.so.$(VERSION): jbig85.o jbig_ar.o

-	$(CC) $(CFLAGS) -shared -Wl,-soname,$@ -o $@ $^

+	$(CC) $(CFLAGS) $(LDFLAGS) -shared -Wl,-soname,$@ -o $@ $^

 jbig.o jbig85.o jbig_ar.o: CFLAGS += $(PICFLAGS)

diff -up jbigkit-2.1/pbmtools/Makefile.ldflags jbigkit-2.1/pbmtools/Makefile

--- jbigkit-2.1/pbmtools/Makefile.ldflags	2018-02-27 17:50:35.902857687 +0100

+++ jbigkit-2.1/pbmtools/Makefile	2018-02-27 17:57:09.296328639 +0100

@@ -15,16 +15,16 @@ all: pbmtojbg jbgtopbm pbmtojbg85 jbgtop

 txt: pbmtojbg.txt jbgtopbm.txt pbm.txt pgm.txt

 pbmtojbg: pbmtojbg.o ../libjbig/libjbig.so

-	$(CC) $(CFLAGS) -o pbmtojbg pbmtojbg.o -L../libjbig -ljbig

+	$(CC) $(CFLAGS) -o pbmtojbg pbmtojbg.o -L../libjbig -ljbig $(LDFLAGS)

 jbgtopbm: jbgtopbm.o ../libjbig/libjbig.so

-	$(CC) $(CFLAGS) -o jbgtopbm jbgtopbm.o -L../libjbig -ljbig

+	$(CC) $(CFLAGS) -o jbgtopbm jbgtopbm.o -L../libjbig -ljbig $(LDFLAGS)

 pbmtojbg85: pbmtojbg85.o ../libjbig/libjbig85.so

-	$(CC) $(CFLAGS) -o pbmtojbg85 pbmtojbg85.o -L../libjbig -ljbig85

+	$(CC) $(CFLAGS) -o pbmtojbg85 pbmtojbg85.o -L../libjbig -ljbig85 $(LDFLAGS)

 jbgtopbm85: jbgtopbm85.o ../libjbig/libjbig85.so

-	$(CC) $(CFLAGS) -o jbgtopbm85 jbgtopbm85.o -L../libjbig -ljbig85

+	$(CC) $(CFLAGS) -o jbgtopbm85 jbgtopbm85.o -L../libjbig -ljbig85 $(LDFLAGS)

 jbgtopbm.o: jbgtopbm.c ../libjbig/jbig.h

 pbmtojbg.o: pbmtojbg.c ../libjbig/jbig.h