When trying to install xfcalendar 4.2.1 under Gentoo the install-process aborts
while compiling callbacks.c. 

Hope following log will help: 

callbacks.c: In function `manageAppointment':
callbacks.c:182: error: `ctl_start' undeclared (first use in this function)
callbacks.c:182: error: (Each undeclared identifier is reported only once
callbacks.c:182: error: for each function it appears in.)
callbacks.c:182: error: `ctl_end' undeclared (first use in this function)
callbacks.c:183: error: `ctl_text' undeclared (first use in this function)
callbacks.c: In function `on_btClose_clicked':
callbacks.c:213: warning: implicit declaration of function `dialogWin'
make[2]: *** [xfcalendar-callbacks.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory `/var/tmp/portage/xfcalendar-4.2.1/work/xfcalendar-4.
2.1/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/xfcalendar-4.2.1/work/xfcalendar-4.
2.1'
make: *** [all] Error 2

!!! ERROR: xfce-extra/xfcalendar-4.2.1 failed.
!!! Function xfce4_src_compile, Line 83, Exitcode 2
!!! (no error message)


Reproducible: Always
Steps to Reproduce:
1. calling installation with keyword: ACCEPT_KEYWORDS="~x86" emerge xfcalendar
2. watching the configure-steps (successful)
3. watching the compile-process until it aborts.

Actual Results:  
See the log at the details.
After the problem occured I went into the kitchen to get fresh hot coffee ;) 
and I tried to find out if the bug occured somewhere before (Gentoo-forum,
google etc.) with no luck. 

Expected Results:  
I expected xfcalendar to be installed :)

oh.. I did that already ;) Never mind.