i did some work to compile gnupg-for-java under Macos 10.6

.gitignore

@@ -0,0 +1,3 @@
+build
+dist
+.DS_Store

build.properties

@@ -2,7 +2,7 @@
 
 app.name=javagnupg
 app.type=@APP-TYPE@
-app.version=0.1.5-ascii-armor-linux-i386-ia64
+app.version=0.1.5-ascii-armor-${os.name}-${os.version}-${os.arch}
 app.customer=LGPL
 app.vendor=freiheit.com technologies gmbh
 app.year=2008

build.xml

@@ -24,13 +24,11 @@
             </classpath>
         </javac>
     </target>
-
     <target name="test" depends="gen-jni-header, compile-tests, full-jar" description="Test the library functions...">
-     	<property name="TestEnv" value="textui"/>
+		<property name="TestEnv" value="textui"/>
      	<!-- 	"textui" for text-environment
      			"swingui" for swing-environment
      		 	"awtui" for awt-environment	-->
-
     	<java classname="junit.${TestEnv}.TestRunner" fork ="yes">
             <classpath>
                <pathelement location ="${basedir}/${dist}/${app.name}-${app.version}.jar"/>

src/c/GNUmakefile

@@ -6,8 +6,9 @@ JAVA_HOME := /www/home/tcadm/local/jdk-amd64
 #JAVA_HOME := /usr/local/jdk1.4.2
 endif
 
+UNAME=`which uname`
 # set this from the command line to enforce a particular OS-bitness
-BITS := $(shell /bin/uname -m | grep ".*_[0-9]\+" | sed "s/.*_\([0-9]\+\)/\1/")
+BITS := $(shell $(UNAME) -m | grep ".*_[0-9]\+" | sed "s/.*_\([0-9]\+\)/\1/")
 
 JAVAGNUPG_LIB := libjavagnupg
 JNISRC := $(wildcard GnuPG*.c)
@@ -31,7 +32,15 @@ BITS := 32
 endif
 DEBUG := -g
 CFLAGS := $(MARCH) -Werror -Wall -Wno-deprecated-declarations -fPIC $(shell gpgme-config --cflags)
-CPPFLAGS := -D_REENTRANT -D_THREAD_SAFE -D_FILE_OFFSET_BITS=64 -DLARGEFILE_SOURCE=1 -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux
+CPPFLAGS := -D_REENTRANT -D_THREAD_SAFE -D_FILE_OFFSET_BITS=64 -DLARGEFILE_SOURCE=1 -I$(JAVA_HOME)/include 
+
+ifeq ($(shell $(UNAME)), Linux)
+	CPPFLAGS := -I$(JAVA_HOME)/include/linux
+endif
+
+ifeq ($(shell $(UNAME)), Darwin)
+	CPPFLAGS := -I$(JAVA_HOME)/../Headers
+endif
 
 C_IMPL := ./src/c
 JAVA_BUILD := ../../build

src/java/com/freiheit/gnupg/GnuPGContext.java

@@ -576,42 +576,22 @@ public void delete(GnuPGKey key, boolean allowSecret){
         }
     }
 
-
-
     /**
      * Determines the native library name for the system this is running on.
      * If running on unix, we also try to guess the architecture's bit-ness
      * which has an impact on the library's name
      * @return the name
      */
     private static String getNativeLibraryName() {
-
         // if all fails we assume windblows
-        String libName = "/c/javagnupg";
-
-        try {
-            ProcessBuilder pb = new ProcessBuilder(new String[] { "/bin/uname", "-m" });
-            pb.redirectErrorStream(true);
-            Process p = pb.start();
-            InputStreamReader isr = new InputStreamReader(p.getInputStream());
-            BufferedReader br = new BufferedReader(isr);
-
-            StringBuilder sb = new StringBuilder();
-            String line = null;
-
-            while ((line = br.readLine()) != null) {
-                //System.out.println(line);
-                sb.append(line + "\n");
-            }
-
-            String uName = sb.toString().trim();
-            libName = uName.endsWith("_64") ? "/c/libjavagnupg.64" : "/c/libjavagnupg.32";
-        } catch (Exception e) {
-            System.err.println("Cannot execute 'uname'. Probably running on a non unix environment.");
-            /* nothing here, may add some debug output */
-            e.printStackTrace();
-        }
-
+        String libName = "/c/";
+		libName += System.getProperty("os.name").replace(" ", "_");
+		if(System.getProperty("os.arch") == "amd64"){
+       		libName +=  "/libjavagnupg.64";			
+		}else{
+       		libName +=  "/libjavagnupg.32";			
+		}
+
         return libName + "." + getNativeLibraryExtension();
     }
 
@@ -634,6 +614,9 @@ private static String getNativeLibraryExtension() {
                         if (file.startsWith("lib") && file.endsWith(".so")) {
                             return "so";
                         }
+                        if (file.startsWith("lib") && file.endsWith(".dylib")) {
+                            return "dylib";
+                        }
                     }
                 }
             }