Undo conditional assignment of CC, FC, F77, AR, RANLIB

CC, FC, and AR have defaults and causes complications, so undo last commit
Update readline version number in site_specific.mk.in

git-svn-id: file:///home/users/tmap/svn/repos/ferret/trunk@25882 fdbf22ae-c210-0410-be80-ca943da6b8f8

Author: karlmsmith

platform_specific.mk.i386-linux

@@ -54,21 +54,11 @@ endif
 
 	PLATFORM 	= $(shell uname -s -r) 32-bit
 
-ifeq ($(strip $(CC)),)
 	CC		= $(shell which gcc)
-endif
-ifeq ($(strip $(FC)),)
 	FC		= $(shell which gfortran)
-endif
-ifeq ($(strip $(F77)),)
 	F77		= $(shell which gfortran)
-endif
-ifeq ($(strip $(AR)),)
 	AR		= $(shell which ar)
-endif
-ifeq ($(strip $(RANLIB)),)
 	RANLIB		= $(shell which ranlib)
-endif
 
 	ARFLAGS		= -cr
 

platform_specific.mk.intel-mac

@@ -56,21 +56,11 @@ endif
 
 	PLATFORM 	= $(shell uname -s -r)
 
-ifeq ($(strip $(CC)),)
 	CC		= $(shell which clang)
-endif
-ifeq ($(strip $(FC)),)
 	FC		= $(shell which gfortran)
-endif
-ifeq ($(strip $(F77)),)
 	F77		= $(shell which gfortran)
-endif
-ifeq ($(strip $(AR)),)
 	AR		= $(shell which ar)
-endif
-ifeq ($(strip $(RANLIB)),)
 	RANLIB		= $(shell which ranlib)
-endif
 
 	ARFLAGS		= -cr
 

platform_specific.mk.x86_64-linux

@@ -54,21 +54,11 @@ endif
 
 	PLATFORM 	= $(shell uname -s -r) 64-bit
 
-ifeq ($(strip $(CC)),)
 	CC		= $(shell which gcc)
-endif
-ifeq ($(strip $(FC)),)
 	FC		= $(shell which gfortran)
-endif
-ifeq ($(strip $(F77)),)
 	F77		= $(shell which gfortran)
-endif
-ifeq ($(strip $(AR)),)
 	AR		= $(shell which ar)
-endif
-ifeq ($(strip $(RANLIB)),)
 	RANLIB		= $(shell which ranlib)
-endif
 
 	ARFLAGS		= -cr
 

site_specific.mk.in

@@ -88,8 +88,8 @@ NETCDF_LIBDIR = /usr/local/netcdf-4.4.1.1/lib
 ## this value (or leave it blank).  In this case the system's readline and history
 ## shared-object libraries will be used.
 ## =========================
-# READLINE_LIBDIR = $(HOME)/.local/Cellar/readline/7.0.5/lib
-# READLINE_LIBDIR = /usr/local/Cellar/readline/7.0.5/lib
+# READLINE_LIBDIR = $(HOME)/.local/Cellar/readline/8.0.0/lib
+# READLINE_LIBDIR = /usr/local/Cellar/readline/8.0.0/lib
 READLINE_LIBDIR =
 
 ##