TigerVNC does not build anymore, GL version 1.2 ?

[wwwutz]

when building tigervnc:

-rwxr-xr-x 1 bee   beegrp    4659 Jan 20 08:09 done/tigervnc-1.9.0-2.mxqsub
-rw-r--r-- 1 build build  1502798 Jan 20 08:10 done/tigervnc-1.9.0-2.stdout
-rwxr-xr-x 1 bee   beegrp    4656 Jan 21 14:52 work/tigervnc-1.9.0-2.mxqsub
-rw-r--r-- 1 build beegrp   64765 Jan 21 14:53 work/tigervnc-1.9.0-2.stdout

before:

checking for XLIB... yes
checking for GL... yes
checking for XDMCP... yes

after

checking for GL... no
configure: error: Package requirements (glproto >= 1.4.17 gl >= 7.1.0) were not met:

Requested 'gl >= 7.1.0' but version of GL is 1.2

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

is this related to #1600 ?

[wwwutz]

"does not build anymore" will be handled by the bee queen. so close this one.