package org.jblas;
import org.jblas.exceptions.UnsupportedArchitectureException;
import org.jblas.util.LibraryLoader;
import org.jblas.util.Logger;
/**
* Help class for loading libraries needed for NativeBlas
*
* The only use of this class is to have NativeBlas inherit from this class.
*
* User: Mikio L. Braun
* Date: Oct 24, 2012
*/
class NativeBlasLibraryLoader {
static void loadLibraryAndCheckErrors() {
try {
try {
// Try to load it first, probably it's in the path
System.loadLibrary("jblas");
} catch (UnsatisfiedLinkError e) {
// Nope, ok, so let's copy it.
Logger.getLogger().config(
"BLAS native library not found in path. Copying native library "
+ "from the archive. Consider installing the library somewhere "
+ "in the path (for Windows: PATH, for Linux: LD_LIBRARY_PATH).");
// potentially load dependet libraries (mostly Cygwin libs for Windows)
loadDependentLibraries();
// Ok, and now load it!
new LibraryLoader().loadLibrary("jblas", true);
}
// Let's do some quick tests to see whether we trigger some errors
// when dependent libraries cannot be found
double[] a = new double[1];
NativeBlas.dgemm('N', 'N', 1, 1, 1, 1.0, a, 0, 1, a, 0, 1, 1.0, a, 0, 1);
} catch (UnsatisfiedLinkError e) {
String arch = System.getProperty("os.arch");
String name = System.getProperty("os.name");
if (name.startsWith("Windows") && e.getMessage().contains("Can't find dependent libraries")) {
System.err.println("On Windows, you need some additional support libraries.\n" +
"For example, you can install the two packages in cygwin:\n" +
"\n" +
" mingw64-x86_64-gcc-core mingw64-x86_64-gfortran\n" +
"\n" +
"and add the directory <cygwin-home>\\usr\\x86_64-w64-mingw32\\sys-root\\mingw\\bin to your path.\n\n" +
"For more information, see http://github.com/mikiobraun/jblas/wiki/Missing-Libraries");
} else if (name.equals("Linux") && arch.equals("amd64")) {
System.err.println("On Linux 64bit, you need additional support libraries.\n" +
"You need to install libgfortran3.\n\n" +
"For example for debian or Ubuntu, type \"sudo apt-get install libgfortran3\"\n\n" +
"For more information, see https://github.com/mikiobraun/jblas/wiki/Missing-Libraries");
}
} catch (UnsupportedArchitectureException e) {
System.err.println(e.getMessage());
}
}
public static void loadDependentLibraries() {
String arch = System.getProperty("os.arch");
String name = System.getProperty("os.name");
LibraryLoader loader = new LibraryLoader();
if (name.startsWith("Windows") && arch.equals("amd64")) {
loader.loadLibrary("libgcc_s_sjlj-1", false);
loader.loadLibrary("libgfortran-3", false);
} else if (name.startsWith("Windows") && arch.equals("x86")) {
loader.loadLibrary("libgcc_s_dw2-1", false);
loader.loadLibrary("libgfortran-3", false);
}
}
}