Use C translations of LAPACK when no Fortran compiler is available

Makefile

@@ -25,11 +25,14 @@ ifeq ($(NO_FORTRAN), 1)
 define NOFORTRAN
 1
 endef
-define NO_LAPACK
+ifneq ($(NO_LAPACK), 1)
+define C_LAPACK
 1
 endef
+endif
 export NOFORTRAN
 export NO_LAPACK
+export C_LAPACK
 endif
 
 LAPACK_NOOPT := $(filter-out -O0 -O1 -O2 -O3 -Ofast -O -Og -Os,$(LAPACK_FFLAGS))
@@ -246,10 +249,10 @@ netlib :
 
 else
 netlib : lapack_prebuild
-ifeq ($(NOFORTRAN), $(filter 0,$(NOFORTRAN)))
+#ifeq ($(NOFORTRAN), $(filter 0,$(NOFORTRAN)))
 	@$(MAKE) -C $(NETLIB_LAPACK_DIR) lapacklib
 	@$(MAKE) -C $(NETLIB_LAPACK_DIR) tmglib
-endif
+#endif
 ifneq ($(NO_LAPACKE), 1)
 	@$(MAKE) -C $(NETLIB_LAPACK_DIR) lapackelib
 endif
@@ -267,7 +270,7 @@ prof_lapack : lapack_prebuild
 	@$(MAKE) -C $(NETLIB_LAPACK_DIR) lapack_prof
 
 lapack_prebuild :
-ifeq ($(NOFORTRAN), $(filter 0,$(NOFORTRAN)))
+ifeq ($(NO_LAPACK), $(filter 0,$(NO_LAPACK)))
 	-@echo "FC          = $(FC)" > $(NETLIB_LAPACK_DIR)/make.inc
 	-@echo "override FFLAGS      = $(LAPACK_FFLAGS)" >> $(NETLIB_LAPACK_DIR)/make.inc
 	-@echo "FFLAGS_DRV  = $(LAPACK_FFLAGS)" >> $(NETLIB_LAPACK_DIR)/make.inc

Makefile.system

@@ -352,7 +352,7 @@ OBJCONV = $(CROSS_SUFFIX)objconv
 
 # When fortran support was either not detected or actively deselected, only build BLAS.
 ifeq ($(NOFORTRAN), 1)
-NO_LAPACK = 1
+C_LAPACK = 1
 override FEXTRALIB = 
 endif
 
@@ -1303,6 +1303,10 @@ ifeq ($(DYNAMIC_OLDER), 1)
 CCOMMON_OPT	+= -DDYNAMIC_OLDER
 endif
 
+ifeq ($(C_LAPACK), 1)
+CCOMMON_OPT	+= -DC_LAPACK
+endif
+
 ifeq ($(NO_LAPACK), 1)
 CCOMMON_OPT	+= -DNO_LAPACK
 #Disable LAPACK C interface
@@ -1661,6 +1665,7 @@ export USE_OPENMP
 export CROSS
 export CROSS_SUFFIX
 export NOFORTRAN
+export C_LAPACK
 export NO_FBLAS
 export EXTRALIB
 export CEXTRALIB