On Thu, Jun 4, 2015 at 7:20 AM, Paul A. Bristow <pbristow@hetp.u-net.com> wrote:

or forward slash

Yep, you should use forward slashes.

'C:/Program' is not recognized as an internal or external command,
operable program or batch file.
'C:/Program' is not recognized as an internal or external command,
operable program or batch file.

It would appear that bjam/b2 is not dealing with the space in the filename? (despite the quotes)

Looks like a bug in the gcc toolset.

How can I get all three versions of gcc available?

Without fixing the bug of gcc.jam not dealing with spaces in the paths.. You could re-install mingw some place without spaces. Or make a drive alias for "C:\Program Files".

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