MAKE - ENHANCEMENT - Add checks for Fortran and C compiler environment variables

Author: matt-pharr

install/DEFAULTS.inc

@@ -365,6 +365,36 @@
 # general defaults
 #-----------------------------------------------------------------
 
+# Check if the user has set environment variables for the Fortran compiler and math libraries. 
+# If not, throw an error.
+
+ifndef FC
+    $(error "Must set environment variable FC to a Fortran compiler (e.g. gfortran, ifort, pgfortran)")
+else ifeq ($(findstring ifort,$(FC)),ifort)
+    $(info Using Legacy Intel Fortran compiler)
+else ifeq ($(findstring ifx,$(FC)),ifx)
+    $(info Using Intel Fortran compiler)
+else ifeq ($(findstring gfortran,$(FC)),gfortran)
+    $(info Using GNU Fortran compiler)
+else ifeq ($(findstring pgfortran,$(FC)),pgfortran)
+    $(info Using PGI Fortran compiler)
+else
+    $(error "Unsupported Fortran compiler. Must set environment variable FC to a Fortran compiler (e.g. gfortran, ifort, pgfortran)")
+endif
+ifndef CC
+    $(error "Must set environment variable CC to a C compiler (e.g. gcc, icc, pgcc)")
+else ifeq ($(findstring gcc,$(CC)),gcc)
+    $(info Using GNU C compiler)
+else ifeq ($(findstring icc,$(CC)),icc)
+    $(info Using Legacy Intel C compiler)
+else ifeq ($(findstring icx,$(CC)),icx)
+    $(info Using Intel C compiler)
+else ifeq ($(findstring pgcc,$(CC)),pgcc)
+    $(info Using PGI C compiler)
+else
+    $(error "Unsupported C compiler. Must set environment variable CC to a C compiler (e.g. gcc, icc, pgcc)")
+endif
+
 # List of needed dependencies, will be appended if math or netcdf
 # libraries are not found
 NEEDED_DEPS = harvest