[makeotfexe] Setting head.FontRevision to some value like 0.005 will throw a warning

[LIXiangChen]

Major version number not in range 1 .. 255

Why does major version number have to >= 1?

[miguelsousa]

You can use a version number lower than 1.000, but if you do that the OTF will not work (or even install, IIRC) on Windows. This is something that was done in the early days of OpenType support, to block the usage of the first set of experimental fonts. I believe this is documented somewhere in the spec.

[kenlunde]

@miguelsousa To clarify, OTFs with a head.fontRevision value less than 1.000 cannot be installed on Windows only if the OS/2.achVendID value is set to ADBE.

[miguelsousa]

@kenlunde thanks for the clarification.
@LIXiangChen I'll see if there's a simple way to hide that warning from most font developers.

[miguelsousa]

The warning actually comes from makeotfexe. I'm going to remove the check from there and implement it in makeotf.