sys/cpuset.h cannot be found on FreeBSD

Current "configure.ac" cannot detect "sys/cpuset.h" even if it exists on FreeBSD 9.1:

checking sys/cpuset.h presence... yes
configure: WARNING: sys/cpuset.h: present but cannot be compiled
configure: WARNING: sys/cpuset.h:     check for missing prerequisite headers?
configure: WARNING: sys/cpuset.h: see the Autoconf documentation
configure: WARNING: sys/cpuset.h:     section "Present But Cannot Be Compiled"
configure: WARNING: sys/cpuset.h: proceeding with the compiler's result
configure: WARNING:     ## ----------------------------------------------- ##
configure: WARNING:     ## Report this to glasgow-haskell-bugs@haskell.org ##
configure: WARNING:     ## ----------------------------------------------- ##
checking for sys/cpuset.h... no

This is because sys/param.h should be included in the test.

Trac metadata

Trac field	Value
Version	7.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Build System
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