Difference in command line argument order in Linux and OS X

[Russell Allen]

Just in case anyone has any ideas, I get this in OS X as expected:

Macintosh-2:mio russellallen$ Self -port 4000 -headless
Self Virtual Machine Version 4.1.13, Thu 09 Jan 14 15:06:29 Mac OS X i386 (4.4-272-g885323f-dirty)
Copyright 1989-2003: The Self Group (type _Credits for credits)

for I386:  LogVMMessages = true
for I386:  PrintScriptName  = true
for I386:  Inline = true
for I386:  SICDeferUncommonBranches = false (not implemented)
for I386:  SICReplaceOnStack = false (not implemented)
for I386:  SaveOutgoingArgumentsOfPatchedFrames = true
VM# _CommandLine
<0>: ( | parent* = <1>. | object array: {'/Applications/Self Control.app/Contents/Resources/Self.app/Contents/MacOS/Self', '-port', '4000', '-headless'} )

but I get this in Linux (Fedora 19):

[self at messaging ~]$ ./selfvm -port 4000 -headless
Self Virtual Machine Version 4.1.13, Sat 01 Feb 14 08:00:32 Linux i386 (4.5.0-7-gb833000)
Copyright 1989-2003: The Self Group (type _Credits for credits)

for I386:  LogVMMessages = true
for I386:  PrintScriptName  = true
for I386:  Inline = true
for I386:  SICDeferUncommonBranches = false (not implemented)
for I386:  SICReplaceOnStack = false (not implemented)
for I386:  SaveOutgoingArgumentsOfPatchedFrames = true
VM# _CommandLine
<0>: ( | parent* = <1>. | object array: {'./selfvm', '-port', '-headless', '4000'} )

Why on earth would the order of the command line arguments vary between platforms? Or more precisely, why is Linux reordering my arguments?

Russell


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