I am trying to load a dynamic c++ library I compiled on my system in order to do a wrapper in java. I have been able to do this in the past on windows, but here I struggle to have the library loaded. Here is the code:
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import java.io.File;
public interface libWrapper extends Library {
// String path = "." + File.pathSeparator + "hiddenPath/lib/Dynamic";
// System.setProperty("java.library.path", System.getProperty("java.library.path") + File.pathSeparator + path);
// System.setProperty("java.library.path", path + File.pathSeparator
// + System.getProperty("java.library.path"));
libWrapper INSTANCE = (libWrapper)
Native.loadLibrary(
"libgtengine.so",
libWrapper.class );
Pointer FrameCstructor(String name, long parent,
double x, double y, double z,
double rotX, double rotY, double rotZ,
double vX, double vY, double vZ,
double angVx, double angVy, double angVz,
double accX, double accY, double accZ,
double angAccX, double angAccY, double angAccZ,
boolean addToFramelist);
}
I have tried to specify the location of the library with different methods with no success:
1) specify the -Djava.library.path=PATHTOLIBRARY
2) use System.setProperty, but this was of no success since I was not able to run the code. I receive a compilation error that says it could not find the function setProperty (as well as getProperty): Error:(16, 35) java: expected
3) copy the libgteengine.so in the same folder than the libWrapper class.
I suspect that my library has the wrong architecture build?
here is the error message i get when trying to load it with method 1) and 3)
java.lang.UnsatisfiedLinkError: Unable to load library 'gtengine': Native library (linux-x86-64/libgtengine.so) not found in resource path ([file:/home/ycourvoisier/Documents/Softwares/ideaIU-2017.1/idea-IU-171.3780.107/lib/idea_rt.jar, file:/home/ycourvoisier/Documents/Softwares/ideaIU-2017.1/idea-IU-171.3780.107/plugins/junit/lib/junit-rt.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/charsets.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/deploy.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/cldrdata.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/dnsns.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/jaccess.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/jfxrt.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/localedata.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/nashorn.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/sunec.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/sunjce_provider.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/sunpkcs11.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/ext/zipfs.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/javaws.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/jce.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/jfr.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/jfxswt.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/jsse.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/management-agent.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/plugin.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/resources.jar, file:/home/ycourvoisier/jdk1.8.0_121/jre/lib/rt.jar, file:/home/ycourvoisier/Documents/Development/GitLocalRepo/com-enata-java-math/target/test-classes/, file:/home/ycourvoisier/Documents/Development/GitLocalRepo/com-enata-java-math/target/classes/, file:/home/ycourvoisier/.m2/repository/org/ejml/all/0.30/all-0.30.jar, file:/home/ycourvoisier/.m2/repository/org/ejml/core/0.30/core-0.30.jar, file:/home/ycourvoisier/.m2/repository/org/ejml/dense64/0.30/dense64-0.30.jar, file:/home/ycourvoisier/.m2/repository/org/ejml/denseC64/0.30/denseC64-0.30.jar, file:/home/ycourvoisier/.m2/repository/org/ejml/equation/0.30/equation-0.30.jar, file:/home/ycourvoisier/.m2/repository/org/ejml/simple/0.30/simple-0.30.jar, file:/home/ycourvoisier/.m2/repository/org/apache/commons/commons-csv/1.4/commons-csv-1.4.jar, file:/home/ycourvoisier/.m2/repository/org/glassfish/javax.json/1.0.4/javax.json-1.0.4.jar, file:/home/ycourvoisier/.m2/repository/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar, file:/home/ycourvoisier/.m2/repository/org/hibernate/hibernate-jpamodelgen/5.1.4.Final/hibernate-jpamodelgen-5.1.4.Final.jar, file:/home/ycourvoisier/.m2/repository/org/jboss/logging/jboss-logging/3.3.0.Final/jboss-logging-3.3.0.Final.jar, file:/home/ycourvoisier/.m2/repository/javax/servlet/jsp/javax.servlet.jsp-api/2.2.1/javax.servlet.jsp-api-2.2.1.jar, file:/home/ycourvoisier/.m2/repository/javax/el/el-api/2.2.1-b04/el-api-2.2.1-b04.jar, file:/home/ycourvoisier/.m2/repository/junit/junit/4.12/junit-4.12.jar, file:/home/ycourvoisier/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar, file:/home/ycourvoisier/.m2/repository/org/apache/commons/commons-dbcp2/2.1.1/commons-dbcp2-2.1.1.jar, file:/home/ycourvoisier/.m2/repository/org/apache/commons/commons-pool2/2.4.2/commons-pool2-2.4.2.jar, file:/home/ycourvoisier/.m2/repository/commons-logging/commons-logging/1.2/commons-logging-1.2.jar, file:/home/ycourvoisier/.m2/repository/org/postgresql/postgresql/9.4.1212/postgresql-9.4.1212.jar, file:/home/ycourvoisier/.m2/repository/org/easymock/easymock/3.4/easymock-3.4.jar, file:/home/ycourvoisier/.m2/repository/org/objenesis/objenesis/2.2/objenesis-2.2.jar, file:/home/ycourvoisier/.m2/repository/org/slf4j/slf4j-simple/1.7.22/slf4j-simple-1.7.22.jar, file:/home/ycourvoisier/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar, file:/home/ycourvoisier/.m2/repository/org/openjdk/jmh/jmh-core/1.17.4/jmh-core-1.17.4.jar, file:/home/ycourvoisier/.m2/repository/net/sf/jopt-simple/jopt-simple/4.6/jopt-simple-4.6.jar, file:/home/ycourvoisier/.m2/repository/org/apache/commons/commons-math3/3.2/commons-math3-3.2.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-server/9.4.0.RC1/jetty-server-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/javax/servlet/javax.servlet-api/3.1.0/javax.servlet-api-3.1.0.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-http/9.4.0.RC1/jetty-http-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-io/9.4.0.RC1/jetty-io-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-jndi/9.4.0.RC1/jetty-jndi-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-util/9.4.0.RC1/jetty-util-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-maven-plugin/9.4.0.RC1/jetty-maven-plugin-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-plugin-api/3.0.3/maven-plugin-api-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-model/3.0.3/maven-model-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/sisu/sisu-inject-plexus/2.1.1/sisu-inject-plexus-2.1.1.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/sisu/sisu-inject-bean/2.1.1/sisu-inject-bean-2.1.1.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/sisu/sisu-guice/2.9.4/sisu-guice-2.9.4-no_aop.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-artifact/3.0.3/maven-artifact-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/codehaus/plexus/plexus-utils/2.0.6/plexus-utils-2.0.6.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-core/3.0.3/maven-core-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-settings/3.0.3/maven-settings-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-settings-builder/3.0.3/maven-settings-builder-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-repository-metadata/3.0.3/maven-repository-metadata-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-model-builder/3.0.3/maven-model-builder-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-aether-provider/3.0.3/maven-aether-provider-3.0.3.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/aether/aether-spi/1.11/aether-spi-1.11.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/aether/aether-impl/1.11/aether-impl-1.11.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/aether/aether-api/1.11/aether-api-1.11.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/aether/aether-util/1.11/aether-util-1.11.jar, file:/home/ycourvoisier/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.14/plexus-interpolation-1.14.jar, file:/home/ycourvoisier/.m2/repository/org/codehaus/plexus/plexus-classworlds/2.4/plexus-classworlds-2.4.jar, file:/home/ycourvoisier/.m2/repository/org/codehaus/plexus/plexus-component-annotations/1.5.5/plexus-component-annotations-1.5.5.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/plexus/plexus-sec-dispatcher/1.3/plexus-sec-dispatcher-1.3.jar, file:/home/ycourvoisier/.m2/repository/org/sonatype/plexus/plexus-cipher/1.4/plexus-cipher-1.4.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/plugin-tools/maven-plugin-tools-api/3.4/maven-plugin-tools-api-3.4.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-project/2.2.1/maven-project-2.2.1.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-profile/2.2.1/maven-profile-2.2.1.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-artifact-manager/2.2.1/maven-artifact-manager-2.2.1.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/wagon/wagon-provider-api/1.0-beta-6/wagon-provider-api-1.0-beta-6.jar, file:/home/ycourvoisier/.m2/repository/backport-util-concurrent/backport-util-concurrent/3.1/backport-util-concurrent-3.1.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-plugin-registry/2.2.1/maven-plugin-registry-2.2.1.jar, file:/home/ycourvoisier/.m2/repository/org/codehaus/plexus/plexus-container-default/1.0-alpha-9-stable-1/plexus-container-default-1.0-alpha-9-stable-1.jar, file:/home/ycourvoisier/.m2/repository/classworlds/classworlds/1.1-alpha-2/classworlds-1.1-alpha-2.jar, file:/home/ycourvoisier/.m2/repository/org/apache/maven/maven-plugin-descriptor/2.2.1/maven-plugin-descriptor-2.2.1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-webapp/9.4.0.RC1/jetty-webapp-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-xml/9.4.0.RC1/jetty-xml-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-servlet/9.4.0.RC1/jetty-servlet-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-quickstart/9.4.0.RC1/jetty-quickstart-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-jaas/9.4.0.RC1/jetty-jaas-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-security/9.4.0.RC1/jetty-security-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-plus/9.4.0.RC1/jetty-plus-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-jmx/9.4.0.RC1/jetty-jmx-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/jetty-annotations/9.4.0.RC1/jetty-annotations-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/javax/annotation/javax.annotation-api/1.2/javax.annotation-api-1.2.jar, file:/home/ycourvoisier/.m2/repository/org/ow2/asm/asm/5.1/asm-5.1.jar, file:/home/ycourvoisier/.m2/repository/org/ow2/asm/asm-commons/5.1/asm-commons-5.1.jar, file:/home/ycourvoisier/.m2/repository/org/ow2/asm/asm-tree/5.1/asm-tree-5.1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/websocket/javax-websocket-server-impl/9.4.0.RC1/javax-websocket-server-impl-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/websocket/javax-websocket-client-impl/9.4.0.RC1/javax-websocket-client-impl-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/javax/websocket/javax.websocket-api/1.0/javax.websocket-api-1.0.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/websocket/websocket-server/9.4.0.RC1/websocket-server-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/websocket/websocket-common/9.4.0.RC1/websocket-common-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/websocket/websocket-api/9.4.0.RC1/websocket-api-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/websocket/websocket-client/9.4.0.RC1/websocket-client-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/websocket/websocket-servlet/9.4.0.RC1/websocket-servlet-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/apache-jsp/9.4.0.RC1/apache-jsp-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/toolchain/jetty-schemas/3.1/jetty-schemas-3.1.jar, file:/home/ycourvoisier/.m2/repository/org/mortbay/jasper/apache-jsp/8.5.4/apache-jsp-8.5.4.jar, file:/home/ycourvoisier/.m2/repository/org/mortbay/jasper/apache-el/8.5.4/apache-el-8.5.4.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jdt/core/compiler/ecj/4.4.2/ecj-4.4.2.jar, file:/home/ycourvoisier/.m2/repository/org/eclipse/jetty/apache-jstl/9.4.0.RC1/apache-jstl-9.4.0.RC1.jar, file:/home/ycourvoisier/.m2/repository/org/apache/taglibs/taglibs-standard-spec/1.2.5/taglibs-standard-spec-1.2.5.jar, file:/home/ycourvoisier/.m2/repository/org/apache/taglibs/taglibs-standard-impl/1.2.5/taglibs-standard-impl-1.2.5.jar, file:/home/ycourvoisier/.m2/repository/javax/transaction/javax.transaction-api/1.2/javax.transaction-api-1.2.jar, file:/home/ycourvoisier/Documents/Softwares/ideaIU-2017.1/idea-IU-171.3780.107/lib/idea_rt.jar])
Thanks for your time and help
EDIT
public interface libWrapper extends Library {
static String path = "." + File.pathSeparator + "/home/ycourvoisier/Documents/Development/GitLocalRepo/hydros-mathLibrary/HydrosMathLibraryCode/lib/Dynamic";
static {
System.setProperty( "jna.library.path", path + File.pathSeparator
+ System.getProperty( "java.library.path" ) );
}
libWrapper INSTANCE = (libWrapper)
Native.loadLibrary(
"libgtengine.so",
libWrapper.class );
}
this was suggested in order to use the setProperty of System. But java returns a illegal start of character
EDIT2 here is a condensed version that should do the same, but that doesn't work either. The path is directly specified in the code, so there is no confusion about whether it is provided:
public class Frame {
static {
System.setProperty( "jna.library.path", "/home/NAME/Documents/Development/GitLocalRepo/com-hidden-java-math/src" + File.pathSeparator + System.getProperty( "jna.library.path" ) );
}
public interface libWrapper extends Library {
libWrapper INSTANCE = (libWrapper)
Native.loadLibrary(
"gtengine",
libWrapper.class );
Pointer FrameCstructor(String name, long parent,
double x, double y, double z,
double rotX, double rotY, double rotZ,
double vX, double vY, double vZ,
double angVx, double angVy, double angVz,
double accX, double accY, double accZ,
double angAccX, double angAccY, double angAccZ,
boolean addToFramelist);
}
private Pointer ptrToCFrame;
public Frame(String name, int parent,
double x, double y, double z,
double rotX, double rotY, double rotZ,
double vX, double vY, double vZ,
double angVx, double angVy, double angVz,
double accX, double accY, double accZ,
double angAccX, double angAccY, double angAccZ,
boolean addToFramelist) {
ptrToCFrame = libWrapper.INSTANCE.FrameCstructor( name, parent,
x, y, z, rotX, rotY, rotZ,
vX, vY, vZ, angVx, angVy, angVz,
accX, accY, accZ, angAccX, angAccY, angAccZ,
addToFramelist );
}
}
The solution to the loading issue of the library was to have the code changed (here I still doubt on the right way to do this)
public class Frame {
static {
System.loadLibrary( "gtengine" );
}
public static native Pointer FrameCstructor(String name, long parent,
double x, double y, double z,
double rotX, double rotY, double rotZ,
double vX, double vY, double vZ,
double angVx, double angVy, double angVz,
double accX, double accY, double accZ,
double angAccX, double angAccY, double angAccZ,
boolean addToFramelist);
private Pointer ptrToCFrame;
public Frame(String name, int parent,
double x, double y, double z,
double rotX, double rotY, double rotZ,
double vX, double vY, double vZ,
double angVx, double angVy, double angVz,
double accX, double accY, double accZ,
double angAccX, double angAccY, double angAccZ,
boolean addToFramelist) {
System.out.println("library: " + System.getProperty( "java.library.path" ));
ptrToCFrame = FrameCstructor( name, parent,
x, y, z, rotX, rotY, rotZ,
vX, vY, vZ, angVx, angVy, angVz,
accX, accY, accZ, angAccX, angAccY, angAccZ,
addToFramelist );
}
}
And I had to specify the path of the library libgtengine.so.3.7 (not the shorter version libgtengine.so) in the LD_LIBRARY_PATH environment variable. This was discovered after reading carefully the link (in the video) provided by @mko member.
This now created other difficulties (UnsatisfiedLinkError undefined symbol: XOpenDisplay) that I keep for an other moment.
Thanks