Simultaneous 32 and 64 bit development on the same machine

[Lasse Laursen]

Dear GStreamer-devel,

I've recently found a need to start compiling a 64-bit version of my 
GStreamer app. I'd prefer not having to give up my 32-bit version 
though, so I set about to have my cake and eat it too.

But I'm left with a few questions, to which I may, or may not already 
have the answers. I could do with some input regardless.

So the two big challenges I see that need resolving are as follows:

1. GST_PLUGIN_PATH defined as an environment variable. This can - of 
course - only point to either the 32 or 64 bit collection of plug-ins. 
My assumption is that plug-ins are also compiled in either a 32 or 64 
bit fashion and should be used with the respective version of the 
GStreamer library. An earlier message on this mailing list indicated 
that Gstreamer automatically scans this place:

DIR/lib/gstreamer-1.0/ where DIR is

g_win32_get_package_installation_directory_of_module()

here I'm already a bit curious as whether that changes the directory it 
points at if you're running a 64-bit version of an application 
dynamically linked with 64-bit GStreamer...?

Another helpful user pointed out the option of using 'putenv' to modify 
the environment variables during runtime, which would then fairly easily 
let me point the GST_PLUGIN_PATH to the right directory.

2. The PATH environment variable has the same issue - pointing only to 
the 32 or 64 binaries. I'm guessing 'putenv' could solve this too, 
unless someone else has some other cool and easier ways to fix this?

------------------

With both these approaches one thing I worry about it having to remove 
the default environment variables, as using GStreamers executables 
separately is quite useful for testing a lot of stuff. But having to 
continuously add and remove them is quite the hassle. Apart from 
creating a custom batch file that launches a cmd window and adds these 
env. variables, I'm also a little at a loss as to how to solve this...

Any and all thoughts/comments are welcome. I will test this soon, but I 
am keen to hear existing experience!

Regards,
Lasse

-- 
Lasse Farnung Laursen
Post.doc at the University of Tokyo
www.lasselaursen.com <http://www.lasselaursen.com>
FB: lasse.laursen <https://www.facebook.com/lasse.laursen>
Twitter: @PMP_J <https://twitter.com/PMP_J>
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