Re-enable the EXPRECISION option for non-Windows x86/x86_64

Makefile.system

@@ -446,7 +446,7 @@ endif
 
 ifeq ($(OSNAME), Linux)
 EXTRALIB	+= -lm
-NO_EXPRECISION = 1
+#NO_EXPRECISION = 1
 endif
 
 ifeq ($(OSNAME), Android)
@@ -572,7 +572,7 @@ NO_BINARY_MODE	= 1
 endif
 
 ifeq ($(CORE), generic)
-NO_EXPRECISION = 1
+#NO_EXPRECISION = 1
 endif
 
 ifndef NO_EXPRECISION
@@ -595,7 +595,7 @@ endif
 ifeq ($(ARCH), x86_64)
 
 ifeq ($(CORE), generic)
-NO_EXPRECISION = 1
+#NO_EXPRECISION = 1
 endif
 
 ifndef NO_EXPRECISION
@@ -828,8 +828,8 @@ BINARY_DEFINED	= 1
 
 ifeq ($(F_COMPILER), GFORTRAN)
 ifeq ($(C_COMPILER), GCC)
-# EXPRECISION	= 1
-# CCOMMON_OPT	+= -DEXPRECISION
+EXPRECISION	= 1
+CCOMMON_OPT	+= -DEXPRECISION
 endif
 endif
 endif
@@ -1392,17 +1392,15 @@ endif
 endif
 
 ifeq ($(F_COMPILER), CRAY)
-CCOMMON_OPT += -DF_INTERFACE_CRAYFC
+CCOMMON_OPT += -DF_INTERFACE_INTEL
 FCOMMON_OPT += -hnopattern
 ifdef INTERFACE64
 ifneq ($(INTERFACE64), 0)
 FCOMMON_OPT += -s integer64
 endif
 endif
-ifeq ($(USE_OPENMP), 1)
-FCOMMON_OPT += -fopenmp
-else
-FCOMMON_OPT += -fno-openmp
+ifneq ($(USE_OPENMP), 1)
+FCOMMON_OPT += -O noomp
 endif
 endif