COMP: some low-level darwin-related patches

- a partial selection from https://github.com/mrklein/openfoam-os-x
  with adjustments. The primary purpose is to reduce header-level
  incompatibilities and to provide a common set of make rules to allow
  easier patching (or re-integration).

wmake/rules/darwin64Gcc/c

@@ -0,0 +1,16 @@
+SUFFIXES += .c
+
+cc          = gcc -m64 -Ddarwin
+
+cWARN       = -Wall
+
+include $(DEFAULT_RULES)/c$(WM_COMPILE_OPTION)
+
+cFLAGS      = $(GFLAGS) $(cWARN) $(cOPT) $(cDBUG) $(LIB_HEADER_DIRS) -fPIC
+
+ctoo        = $(WM_SCHEDULER) $(cc) $(cFLAGS) -c $< -o $@
+
+LINK_LIBS   = $(cDBUG)
+
+LINKLIBSO   = $(cc) -Wl,-dylib,-undefined,dynamic_lookup
+LINKEXE     = $(cc) -Wl,-execute,-undefined,dynamic_lookup

wmake/rules/darwin64Gcc/c++

@@ -0,0 +1,17 @@
+include $(GENERAL_RULES)/Gcc/c++
+
+CC          = g++ -std=c++11 -m64 -Ddarwin
+
+include $(DEFAULT_RULES)/c++$(WM_COMPILE_OPTION)
+
+c++FLAGS    = $(GFLAGS) $(c++WARN) $(c++OPT) $(c++DBUG) $(ptFLAGS) $(LIB_HEADER_DIRS) -fPIC
+
+Ctoo        = $(WM_SCHEDULER) $(CC) $(c++FLAGS) -c $< -o $@
+cxxtoo      = $(Ctoo)
+cctoo       = $(Ctoo)
+cpptoo      = $(Ctoo)
+
+LINK_LIBS   = $(c++DBUG)
+
+LINKLIBSO   = $(CC) $(c++FLAGS) -Wl,-dylib,-undefined,dynamic_lookup
+LINKEXE     = $(CC) $(c++FLAGS) -Wl,-execute,-undefined,dynamic_lookup

wmake/rules/darwin64Gcc/c++Debug

@@ -0,0 +1,2 @@
+c++DBUG     = -ggdb3 -DFULLDEBUG
+c++OPT      = -O0 -fdefault-inline

wmake/rules/darwin64Gcc/c++Opt

@@ -0,0 +1,4 @@
+c++DBUG     =
+c++OPT      = -O3
+
+ROUNDING_MATH = -frounding-math

wmake/rules/darwin64Gcc/c++Prof

@@ -0,0 +1,2 @@
+c++DBUG    = -pg
+c++OPT     = -O2

wmake/rules/darwin64Gcc/cDebug

@@ -0,0 +1,2 @@
+cDBUG       = -ggdb -DFULLDEBUG
+cOPT        = -O1 -fdefault-inline -finline-functions

wmake/rules/darwin64Gcc/cOpt

@@ -0,0 +1,2 @@
+cDBUG       =
+cOPT        = -O3

wmake/rules/darwin64Gcc/cProf

@@ -0,0 +1,2 @@
+cDBUG       = -pg
+cOPT        = -O2

wmake/rules/darwin64Gcc/general

@@ -0,0 +1,9 @@
+CPP        = cpp -traditional-cpp $(GFLAGS) -Ddarwin
+
+PROJECT_LIBS = -l$(WM_PROJECT) -ldl
+
+include $(GENERAL_RULES)/standard
+include $(GENERAL_RULES)/Gcc/openmp
+
+include $(DEFAULT_RULES)/c
+include $(DEFAULT_RULES)/c++