Index: build.xml
--- build.xml.orig	2019-10-30 19:26:04.146178000 +0100
+++ build.xml	2019-10-30 19:26:45.815281000 +0100
@@ -408,7 +408,7 @@
     <!-- Bundle native components with primary jar to facilitate
          easy distribution to common platforms.
       -->
-    <jar jarfile="${build}/${jar}" duplicate="preserve" createUnicodeExtraFields="never" encoding="UTF-8">
+    <jar jarfile="${build}/${jar}" duplicate="add" update="true" createUnicodeExtraFields="never" encoding="UTF-8">
       <manifest>
         <attribute name="Main-Class" value="com.sun.jna.Native"/>
         <attribute name="Manifest-Version" value="1.0"/>
Index: native/Makefile
--- native/Makefile.orig	2019-10-30 17:41:18.000000000 +0100
+++ native/Makefile	2019-10-30 19:26:04.146488000 +0100
@@ -81,7 +81,7 @@
 LIBSFX=.so
 ARSFX=.a
 JNISFX=$(LIBSFX)
-CC=gcc
+CC=gcc -fPIC
 LD=$(CC)
 LIBS=
 # Default to Sun recommendations for JNI compilation
@@ -93,7 +93,7 @@
 CFLAGS_EXTRA=
 COUT=-o $@
 CINCLUDES=$(JAVA_INCLUDES) -I"$(JAVAH)" -I$(FFI_BUILD)/include
-CDEFINES=-D_REENTRANT
+CDEFINES=-D_REENTRANT -DNO_JAWT
 PCFLAGS=-W -Wall -Wno-unused -Wno-parentheses
 CFLAGS=$(PCFLAGS) $(CFLAGS_EXTRA) $(COPT) $(CDEBUG) $(CDEFINES) $(CINCLUDES) \
        -DJNA_JNI_VERSION='"$(JNA_JNI_VERSION)"' -DCHECKSUM='"$(CHECKSUM)"'