fix libgfortran reference for macOS

source/f90/Makefile

@@ -16,6 +16,9 @@ endif
 # python3 interpreter
 PYTHON3 = python3
 
+# Platform, i.e. operating system
+OS := $(shell echo `uname -s`)
+
 # implicit rules for compiling fortran files
 %.o:       %.f90 ; $(FC) $(FFLAGS) -c $< 
 %_mod.mod: %.f90 ; $(FC) $(FFLAGS) -c $<
@@ -79,11 +82,27 @@ eels-boson: eels-boson.f90 get_commandline_options.o $(getoptsubs) $(getoptmods)
 
 pylibs: doeels-py doboson-py
 
-doeels-py: doeels.f90 quanc8.f90 surlos.f90 fint1.f90 fint2.f90 fint3.f90 queels.f90 phint.f90 qrat.f90 usurlo.f90 param.f90 oscillatorType.f90
-	$(PYTHON3) -m numpy.f2py -c seteps.f90 doeels.f90 quanc8.f90 surlos.f90 fint1.f90 fint2.f90 fint3.f90 queels.f90 phint.f90 qrat.f90 usurlo.f90 param.f90 oscillatorType.f90 -m doeels
+doeels-py: doeels.f90 quanc8.f90 surlos.f90 fint1.f90 fint2.f90 fint3.f90 queels.f90 phint.f90 qrat.f90 usurlo.f90 param.f90 oscillatorType.f90 fun.f90
+ifeq ($(OS),Darwin)
+	$(PYTHON3) -m numpy.f2py -c seteps.f90 doeels.f90 quanc8.f90 surlos.f90 fint1.f90 fint2.f90 fint3.f90 queels.f90 phint.f90 qrat.f90 usurlo.f90 param.f90 oscillatorType.f90 fun.f90 -m doeels
+	install_name_tool -change @rpath/libgfortran.5.dylib /opt/local/lib/libgcc/libgfortran.5.dylib doeels.cpython-312-darwin.so
+else
+	$(PYTHON3) -m numpy.f2py -c seteps.f90 doeels.f90 quanc8.f90 surlos.f90 fint1.f90 fint2.f90 fint3.f90 queels.f90 phint.f90 qrat.f90 usurlo.f90 param.f90 oscillatorType.f90 fun.f90 -m doeels
+endif
 
 doboson-py: doboson.f90 sicot.f90 sintr.f90 rcffi.f90 respon.f90 o.f90
+ifeq ($(OS),Darwin)
+	$(PYTHON3) -m numpy.f2py -c o.f90 sintr.f90 rcffi.f90 respon.f90 sicot.f90 doboson.f90 -m doboson
+	install_name_tool -change @rpath/libgfortran.5.dylib /opt/local/lib/libgcc/libgfortran.5.dylib doboson.cpython-312-darwin.so
+else
 	$(PYTHON3) -m numpy.f2py -c o.f90 sintr.f90 rcffi.f90 respon.f90 sicot.f90 doboson.f90 -m doboson
+endif
+
+mytest:
+	echo $(OS)
+ifeq ( $(OS), Darwin )
+	echo $(OS)
+endif
 
 clean:
 	rm -f *.o