Made all the needed packages explicit, and added configure tests for all of them

Makefile.am

@@ -12,6 +12,21 @@ GHC_OPTS = \
 	-fwarn-unused-binds \
 	-fwarn-unused-imports \
 	\
+	-hide-all-packages \
+	-package array \
+	-package base \
+	-package containers \
+	-package directory \
+	-package fgl \
+	-package HUnit \
+	-package mtl \
+	-package parsec \
+	-package pretty \
+	-package process \
+	-package QuickCheck \
+	-package random \
+	-package regex-compat \
+	\
 	-ibackends \
 	-ichecks \
 	-icommon \

configure.ac

@@ -63,11 +63,17 @@ AC_DEFUN([AC_NEED_HASKELL_LIB],
   fi
 ])
 
+AC_NEED_HASKELL_LIB([array],LIB_array)
+AC_NEED_HASKELL_LIB([containers],LIB_containers)
+AC_NEED_HASKELL_LIB([directory],LIB_directory)
 AC_NEED_HASKELL_LIB([mtl],LIB_mtl)
 AC_NEED_HASKELL_LIB([HUnit],LIB_hunit)
 AC_NEED_HASKELL_LIB([parsec],LIB_parsec)
+AC_NEED_HASKELL_LIB([pretty],LIB_pretty)
 AC_NEED_HASKELL_LIB([fgl],LIB_fgl)
+AC_NEED_HASKELL_LIB([process],LIB_process)
 AC_NEED_HASKELL_LIB([QuickCheck],LIB_quickcheck)
+AC_NEED_HASKELL_LIB([random],LIB_random)
 AC_NEED_HASKELL_LIB([regex-base],LIB_regexbase)
 AC_NEED_HASKELL_LIB([regex-compat],LIB_regexcompat)
 AC_NEED_HASKELL_LIB([regex-posix],LIB_regexposix)