Hello,

When you open the glibc headers in Geany, do the tags show in the symbol
list?

yes. 

Can you show the command-line you used to generate the file?

geany -g glibc.c.tags ~/glibc.h  (where glibc.h contains some #defines and #includes). 

Also, perhaps try using the -P option when generating tags.

thanks!, that seems to work (I just had to make a header list -via gcc -M glibc.h- before).
I just hope I don't lose anything...