Hello, before making a ticket for this, I'm curious why are not shared libs build on Solaris 11 on GHC HEAD. Please note 7.6.1 release is not affected by this and shared libs are build on Solaris well (using the exactly same environment). I've tried to debug a little bit makefile machinery and the results are confusing: $ gmake show VALUE=PlatformSupportsSharedLibs gmake -r --no-print-directory -f ghc.mk show PlatformSupportsSharedLibs="YES" so here, everything is fine, Solaris is supported for shared libs (i.e. there is no broken ld presented on Solaris 11 which would disable this feature). Now: $ gmake show VALUE=GhcLibWays gmake -r --no-print-directory -f ghc.mk show GhcLibWays="v" why is that, when the code in mk/config.mk is clear enough and contains: ifeq "$(PlatformSupportsSharedLibs)" "YES" GhcLibWays += dyn endif ? Am I just simply blind and don't see obvious fact or is that really confusing behavior? BTW: Solaris 11 provided GNU make 3.81, that's what I'm using. Thanks a lot for any idea how to debug this further! Karel