Makefile upgrade for AppleSilicon

Thanks to Bohao.

Author: James Craig

src/Makefile

@@ -12,6 +12,7 @@
 #            Jan 2019    Alan J. Barton - added OS name to created exe name
 #            Dec 2023    David Huard    - support for python binding
 #            Jul 2024    James Craig and Bohao Tang - support for lp_solve
+#            Feb 2025    James Craig and Bohao Tang - support for new Mac (Applie Silicon)
 ###
 # appname := raven_rev$(shell svnversion -n . | sed -e 's/:/-/g')_$(shell uname -o).exe
 appname := Raven.exe
@@ -28,13 +29,20 @@ CXXFLAGS += -std=c++11 -fPIC
 #CXXFLAGS += -Dnetcdf
 #LDLIBS   += -L/usr/local -lnetcdf
 
+# OPTION 1b) include netcdf - for newer MacOS with Apple Silicon (use with option 1 also uncommented)
+#CXXFLAGS += -I/opt/homebrew/include
+#LDLIBS   += -L/opt/homebrew/lib
+
 # OPTION 2) include lp_solve for water management optimization- uncomment following two commands (assumes liblpsolve55.a in ../lib/lp_solve_unix/ folder):
-CXXFLAGS += -D_LPSOLVE_
-LDLIBS   += -L../lib/lp_solve_unix -llpsolve55
+#CXXFLAGS += -D_LPSOLVE_
+#LDLIBS   += -L../lib/lp_solve_unix -llpsolve55
+
+# OPTION 2b) include lp_solve for water management optimization- for newer MacOS with Apple Silicon (use with option 2 also uncommented):
+#LDLIBS   += -L/opt/homebrew/lib
 
 # OPTION 3) if you use a OSX/BSD system, uncomment the LDFLAGS line below
 # this is to allow for use a 1Gb stack, see http://linuxtoosx.blogspot.ca/2010/10/stack-overflow-increasing-stack-limit.html
-# LDFLAGS  += -Wl,-stack_size,0x80000000,-stack_addr,0xf0000000
+#LDFLAGS  += -Wl,-stack_size,0x80000000,-stack_addr,0xf0000000
 
 # OPTION 4) uncomment for M1 and newer MacOS
 #CXXFLAGS += -Dfinite=isfinite