In version 7.7 they are still present, in 7.8 they are gone, although still defined in the headers.
See related bug in gentoo:
Created attachment 48065 [details] [review]
patch from linked bug
Add GLAPI to the two functions in question (499 bytes, patch)
2011-06-02 11:56 UTC, Gert Wollny
Created attachment 48070 [details] [review]
glw: Mark all extern symbols GLAPI to regain default visibility (#31294)
I think this is the more complete patch that fixes both the Motif and non-Motif cases for GLw. Can you test it out?
Works here in all tested cases.
Thanks. Pushed in 4e5c51a05e70c215b284a38fc35850b485bbee8d. This could almost certainly be backported to stable branches. If nobody reports any breakage over the next few days, I'll pull it over to the 7.9 and 7.10 branches.