Problem with GNUMail

[Tristan]

Hi, I'm trying to compile GNUMail. However, whenever I do, it does this to
me:

       -o shared_obj/ix86/linux-gnu/gnu-gnu-gnu/AddressBook.o
gcc AddressBookController.m -c \
      -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1 -DGNU_GUI_LIBRARY=1
-DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1 -D_REENTRANT -fPIC -DGSWARN
-DGSDIAGNOSE -O2 -Wno-import -fgnu-runtime -Wall -I.
-I/opt/GNUstep/System/Headers -fgnu-runtime -I/opt/GNUstep/System/Headers
-I/usr/local/include/libxml2/libxml -I/usr/local/include/libxml2
-I/include -I/root/GNUstep/Library/Headers
-I/opt/GNUstep/Local/Library/Headers
-I/opt/GNUstep/Network/Library/Headers
-I/opt/GNUstep/System/Library/Headers
-I/opt/GNUstep/Network/Headers/gnustep -I/root/GNUstep/Headers/gnustep
-I/opt/GNUstep/Local/Headers/gnustep -I/opt/GNUstep/System/Headers/gnustep
-I/opt/GNUstep/Network/Headers/ix86/linux-gnu
-I/root/GNUstep/Headers/ix86/linux-gnu
-I/opt/GNUstep/Local/Headers/ix86/linux-gnu
-I/opt/GNUstep/System/Headers/ix86/linux-gnu -I/root/GNUstep/Headers
-I/opt/GNUstep/Local/Headers -I/opt/GNUstep/Network/Headers
-I/opt/GNUstep/System/Headers \
       -o shared_obj/ix86/linux-gnu/gnu-gnu-gnu/AddressBookController.o
In file included from AddressBookController.m:23:
AddressBookController.h:36: Cannot find interface declaration for
`NSWindowController', superclass of `AddressBookController'
make[1]: ***
[shared_obj/ix86/linux-gnu/gnu-gnu-gnu/AddressBookController.o] Error 1
make: *** [GNUMail.all.app.variables] Error 2


The error happens with both 1.0 pre-1 and 0.90. I'm running a fresh
installation of Slackware 8.0.

I've successfully compiled GNUstep with the latest components as far as I
can tell, and Pantomine. GWorkspace and the Calculator program both
compile and run properly.

Tristan