scilab fails to launch on powerpc

On amd64:
$ scilab -nw -e 'quit;'
Scilab 5.5.0 (Apr 17 2014, 10:06:10)

On powerpc:
$ scilab -nw -e 'quit;'
Could not create a Scilab main class. Error:
Exception in thread "main" java.lang.ExceptionInInitializerError
 at javax.media.opengl.GLProfile.<clinit>(GLProfile.java:83)
 at org.scilab.modules.gui.SwingView.<init>(Unknown Source)
 at org.scilab.modules.gui.SwingView.registerSwingView(Unknown Source)
 at org.scilab.modules.core.Scilab.<init>(Unknown Source)
Caused by: java.lang.RuntimeException: Incompatible MachineDescriptions:
 Static MachineDescriptionStatic: X86_32_UNIX(1): MachineDescription: runtimeValidated false, littleEndian true, 32Bit true, primitive size / alignment:
  int8 1 / 1, int16 2 / 2
  int 4 / 4, long 4 / 4
  int32 4 / 4, int64 8 / 4
  float 4 / 4, double 8 / 4, ldouble 12 / 4
  pointer 4 / 4, page 4096
 Runtime MachineDescription: runtimeValidated true, littleEndian false, 32Bit true, primitive size / alignment:
  int8 1 / 1, int16 2 / 2
  int 4 / 4, long 4 / 4
  int32 4 / 4, int64 8 / 8
  float 4 / 4, double 8 / 8, ldouble 16 / 16
  pointer 4 / 4, page 4096
 at com.jogamp.common.os.Platform.<clinit>(Platform.java:227)
 ... 4 more

Scilab cannot create Scilab Java Main-Class (we have not been able to find the main Scilab class. Check if the Scilab and thirdparty packages are available).

Not sure if the bug is in Scilab or in Openjdk.