Building Sigar 32-bit for Linux

Hi all -

I am trying to build the 32-bit version of Sigar for Linux.   When I build I have my JAVA_HOME pointing to a 32-bit version of java and the build appears to be building a 32-bit version, but when I check the headers on the built library it says it is a 64-bit library.   When I try to use the library I get an UnsatisifiedLinkError (see below).

Here I am trying to run against the built binaries:

$ java -jar sigar-bin/lib/sigar.jar version

/home/epederso/sigar-1.6/bindings/java/sigar-bin/lib/libsigar-x86-linux.so: /home/epederso/sigar-1.6/bindings/java/sigar-bin/lib/libsigar-x86-linux.so: wrong ELF class: ELFCLASS64 (Possible cause: architecture word width mismatch)

org.hyperic.sigar.SigarException: /home/epederso/sigar-1.6/bindings/java/sigar-bin/lib/libsigar-x86-linux.so: /home/epederso/sigar-1.6/bindings/java/sigar-bin/lib/libsigar-x86-linux.so: wrong ELF class: ELFCLASS64 (Possible cause: architecture word width mismatch)

        at org.hyperic.sigar.Sigar.loadLibrary(Sigar.java:172)

Here is the readelf output for the library that was built, showing it is ELF64.

$ readelf -h sigar-bin/lib/libsigar-x86-linux.so

ELF Header:

  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00

  Class:                             ELF64

  Data:                              2's complement, little endian

  Version:                           1 (current)

  OS/ABI:                            UNIX - System V

  ABI Version:                       0

  Type:                              DYN (Shared object file)

  Machine:                           Advanced Micro Devices X86-64

  Version:                           0x1

  Entry point address:               0xa1b0

  Start of program headers:          64 (bytes into file)

  Start of section headers:          213536 (bytes into file)

  Flags:                             0x0

  Size of this header:               64 (bytes)

  Size of program headers:           56 (bytes)

  Number of program headers:         5

  Size of section headers:           64 (bytes)

  Number of section headers:         28

  Section header string table index: 25

Finally here is the output from the build:

$ ant

Buildfile: /home/epederso/sigar-1.6/bindings/java/build.xml

jni-init:

    [mkdir] Created dir: /home/epederso/sigar-1.6/bindings/java/build/classes

     [echo] jni.src=linux, jni.jdk.os=linux, 32-bit

    [javac] /home/epederso/sigar-1.6/bindings/java/hyperic_jni/jni-build.xml:165: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds

    [javac] Compiling 6 source files to /home/epederso/sigar-1.6/bindings/java/build/classes

    [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.4

    [javac] Note: /home/epederso/sigar-1.6/bindings/java/hyperic_jni/src/org/hyperic/jni/ArchLoader.java uses or overrides a deprecated API.

    [javac] Note: Recompile with -Xlint:deprecation for details.

    [javac] 1 warning

  [libarch] x86-linux

     [echo] java.home=/usr/java/jdk1.7.0_02_32

sigar-version:

     [echo] SIGAR git revision exported

version-file:

     [echo] cp ./src/org/hyperic/sigar/SigarVersion.java.in -> /home/epederso/sigar-1.6/bindings/java/build/./src/org/hyperic/sigar/SigarVersion.java

     [copy] Copying 1 file to /home/epederso/sigar-1.6/bindings/java/build/src/org/hyperic/sigar

version-file:

     [echo] cp ../../src/sigar_version.c.in -> /home/epederso/sigar-1.6/bindings/java/build/src/sigar_version.c

     [copy] Copying 1 file to /home/epederso/sigar-1.6/bindings/java/build/src

version-file:

     [echo] cp ../../src/os/darwin/Info.plist.in -> /home/epederso/sigar-1.6/bindings/java/build/src/Info.plist

     [copy] Copying 1 file to /home/epederso/sigar-1.6/bindings/java/build/src

version-file:

     [echo] cp ../../src/os/win32/sigar.rc.in -> /home/epederso/sigar-1.6/bindings/java/build/src/sigar.rc

     [copy] Copying 1 file to /home/epederso/sigar-1.6/bindings/java/build/src

sigar.rc:

prepare-src:

     [exec] javasigar_generated.c needs update

     [exec] generating javasigar_generated.c

     [exec] generating javasigar_generated.h

     [exec] generating org/hyperic/sigar/Uptime.java

     [exec] skipping org/hyperic/sigar/NetStat.java

     [exec] generating org/hyperic/sigar/DirStat.java

     [exec] skipping org/hyperic/sigar/CpuPerc.java

     [exec] generating org/hyperic/sigar/ResourceLimit.java

     [exec] generating org/hyperic/sigar/NfsServerV3.java

     [exec] generating org/hyperic/sigar/FileAttrs.java

     [exec] generating org/hyperic/sigar/Cpu.java

     [exec] generating org/hyperic/sigar/NfsClientV2.java

     [exec] generating org/hyperic/sigar/DiskUsage.java

     [exec] generating org/hyperic/sigar/CpuInfo.java

     [exec] generating org/hyperic/sigar/FileSystem.java

     [exec] generating org/hyperic/sigar/Who.java

     [exec] generating org/hyperic/sigar/Swap.java

     [exec] generating org/hyperic/sigar/ProcTime.java

     [exec] generating org/hyperic/sigar/FileSystemUsage.java

     [exec] generating org/hyperic/sigar/ProcMem.java

     [exec] generating org/hyperic/sigar/ThreadCpu.java

     [exec] generating org/hyperic/sigar/NetRoute.java

     [exec] generating org/hyperic/sigar/ProcStat.java

     [exec] generating org/hyperic/sigar/NetInterfaceConfig.java

     [exec] generating org/hyperic/sigar/NetInfo.java

     [exec] generating org/hyperic/sigar/SysInfo.java

     [exec] generating org/hyperic/sigar/Mem.java

     [exec] generating org/hyperic/sigar/NfsClientV3.java

     [exec] generating org/hyperic/sigar/DirUsage.java

     [exec] generating org/hyperic/sigar/NetConnection.java

     [exec] generating org/hyperic/sigar/Tcp.java

     [exec] generating org/hyperic/sigar/NetInterfaceStat.java

     [exec] generating org/hyperic/sigar/ProcCred.java

     [exec] generating org/hyperic/sigar/ProcFd.java

     [exec] generating org/hyperic/sigar/ProcCredName.java

     [exec] generating org/hyperic/sigar/ProcCpu.java

     [exec] generating org/hyperic/sigar/NfsServerV2.java

     [exec] generating org/hyperic/sigar/ProcState.java

     [exec] generating org/hyperic/sigar/ProcExe.java

jni-compile:

jni-cc:

    [mkdir] Created dir: /home/epederso/sigar-1.6/bindings/java/build/obj/x86-linux/lib

     [echo] jni libname=sigar-x86-linux

       [cc] 13 total files to be compiled.

       [cc] Starting link

jni-lib-copy:

    [mkdir] Created dir: /home/epederso/sigar-1.6/bindings/java/sigar-bin/lib

     [copy] Copying 2 files to /home/epederso/sigar-1.6/bindings/java/sigar-bin/lib

copy-includes:

    [mkdir] Created dir: /home/epederso/sigar-1.6/bindings/java/sigar-bin/include

     [copy] Copying 5 files to /home/epederso/sigar-1.6/bindings/java/sigar-bin/include

build-jni:

compile:

    [javac] /home/epederso/sigar-1.6/bindings/java/build.xml:102: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds

    [javac] Compiling 181 source files to /home/epederso/sigar-1.6/bindings/java/build/classes

    [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.4

    [javac] /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/shell/ShellIntHandler.java:21: warning: Signal is internal proprietary API and may be removed in a future release

    [javac] import sun.misc.Signal;

    [javac]                ^

    [javac] /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/shell/ShellIntHandler.java:22: warning: SignalHandler is internal proprietary API and may be removed in a future release

    [javac] import sun.misc.SignalHandler;

    [javac]                ^

    [javac] /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/shell/ShellIntHandler.java:24: warning: SignalHandler is internal proprietary API and may be removed in a future release

    [javac] public class ShellIntHandler implements SignalHandler {

    [javac]                                         ^

    [javac] /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/shell/ShellIntHandler.java:33: warning: Signal is internal proprietary API and may be removed in a future release

    [javac]         Signal signal;

   [javac]         ^

    [javac] /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/shell/ShellIntHandler.java:35: warning: Signal is internal proprietary API and may be removed in a future release

    [javac]             signal = new Signal("INT");

    [javac]                          ^

    [javac] /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/shell/ShellIntHandler.java:41: warning: Signal is internal proprietary API and may be removed in a future release

    [javac]             Signal.handle(signal, new ShellIntHandler());

    [javac]             ^

    [javac] /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/shell/ShellIntHandler.java:47: warning: Signal is internal proprietary API and may be removed in a future release

    [javac]     public void handle(Signal signal) {

    [javac]                        ^

    [javac] Note: /home/epederso/sigar-1.6/bindings/java/src/org/hyperic/sigar/cmd/Ps.java uses or overrides a deprecated API.

    [javac] Note: Recompile with -Xlint:deprecation for details.

    [javac] 8 warnings

pack:

      [jar] Building jar: /home/epederso/sigar-1.6/bindings/java/sigar-bin/lib/sigar.jar

build:

BUILD SUCCESSFUL

Total time: 10 seconds