groff 1.23.0 fails to build user.ps; skip build since we are not shipping it anyway

diff -wpruN --no-dereference '--exclude=*.orig' a~/dbug/CMakeLists.txt a/dbug/CMakeLists.txt
--- a~/dbug/CMakeLists.txt	1970-01-01 00:00:00
+++ a/dbug/CMakeLists.txt	1970-01-01 00:00:00
@@ -30,7 +30,7 @@ IF(NOT CMAKE_CROSSCOMPILING OR DEFINED C
   TARGET_LINK_LIBRARIES(factorial dbug)
 ENDIF()
 
-IF(NOT WIN32 AND NOT CMAKE_GENERATOR MATCHES Xcode AND NOT RPM AND NOT DEB)
+IF(NOT WIN32 AND NOT CMAKE_GENERATOR MATCHES Xcode AND NOT RPM AND NOT DEB AND NOT CMAKE_HOST_SOLARIS)
   FIND_PROGRAM(GROFF groff)
   FIND_PROGRAM(NROFF nroff)
   MARK_AS_ADVANCED(GROFF)