#
# ------ MacOS-X ------      !!! not generally supported !!!
#                                 MacOS 10.3 gcc-3.3
#                                 MacOS 10.4 gcc-4.0
# Uses default MacOS-X compiler (g++).
# Includes commands to build the .dylib (MacOS-X shared libs)
# 
# Use   echo -n    (there is not the 'echo -e' option of Linux)
#
# Author: Helmut Burkhardt - CERN
#
ifeq ($(G4SYSTEM),Darwin-g++)
  CXX       := g++
  CXXFLAGS  := -Wall -ansi -pedantic -Wno-non-virtual-dtor -Wno-long-long
  CXXFLAGS  += -Wwrite-strings -Wpointer-arith -Woverloaded-virtual -pipe
  ifdef G4OPTIMISE
    CXXFLAGS  += -O
    FCFLAGS   := -O
    CCFLAGS   := -O
  else
    ifdef G4DEBUG
      CXXFLAGS  += -g
      FCFLAGS   := -g
      CCFLAGS   := -g
    endif
  endif
  ifdef G4PROFILE
    CXXFLAGS  += -pg
    FCFLAGS   += -pg
    CCFLAGS   += -pg
  endif
  FC := g77
  FCFLAGS += -fno-automatic -fno-backslash -fno-second-underscore
  FCLIBS := -lg2c -lnsl
  ECHO    := /bin/echo -n
  SHEXT   := dylib
  X11FLAGS  := -I/usr/include/X11/extensions -I/usr/include/X11
  X11LIBS   := -L/usr/X11R6/lib  -lXmu -lXt -lXext -lX11 -lXi -lSM -lICE
  XMFLAGS   := -I/sw/include
#  XMFLAGS   := -I/usr/X11R6/include          ##### some installations.
  XMLIBS    := -L/sw/lib -lXm -lXpm
#  XMLIBS    := -L/usr/X11R6/lib -lXm -lXpm   ##### some installations.
  DLDLIBS   := -ldl
  ifndef OGLHOME
    OGLHOME  := /usr/X11R6
  endif
  ifndef OGLFLAGS
    OGLFLAGS  := -I$(OGLHOME)/include 
  endif
  ifndef OGLLIBS
    OGLLIBS   := -L$(OGLHOME)/lib -lGLU -lGL
  endif
#
#  There are two ways to build shared libs (.dylib) on MacOSX.
# Up to now the "flat_namespace" option had been used ; but
# due to the fact that Apple promotes now the "two_level_namespace"
# way of doing, we had tried to build the shared libs in this way.
#  But it appears that for the moment this option induces
# unresolved early crashes at runtim. These crashes are
# probably due to a problem in the sequence of execution 
# of constructor of static objects that are now heavily 
# used in Geant4.
#  Waiting a solution to that, we put the "flat_namespace"
# way of doing as the default to build the .dylib (knowing
# that it is anyway not a long term solution).
#   G.Barrand (16/07/2004)
#
####  G4_MACOSX_TWO_LEVEL_NAMESPACE = 1
ifdef G4_MACOSX_TWO_LEVEL_NAMESPACE
  define build-granular-shared-lib
    @libdir=`(cd $(@D);/bin/pwd)`; \
     cd $(G4TMPDIR); \
     g++ -dynamiclib -twolevel_namespace -undefined define_a_way -dynamic \
         -single_module -o $$libdir/$(@F) *.o -L$(G4LIB)/$(G4SYSTEM) \
         -L$(CLHEP_LIB_DIR) -l$(CLHEP_LIB) $(INTYLIBS)
  endef
else
  define build-granular-shared-lib
    @libdir=`(cd $(@D);/bin/pwd)`; \
     cd $(G4TMPDIR); \
     g++ -dynamiclib -flat_namespace -undefined suppress  -dynamic -single_module -o $$libdir/$(@F) $(INTYLIBS) *.o
  endef
endif
ifdef G4_MACOSX_TWO_LEVEL_NAMESPACE
  define build-global-shared-lib
    @libdir=`(cd $(@D);/bin/pwd)`; \
     cd $(G4TMP)/$(G4SYSTEM); \
     g++ -dynamiclib -twolevel_namespace -undefined error -dynamic \
         -single_module -o $$libdir/$(@F) \
         $(foreach dir,$(SUBLIBS),$(dir)/*.o) -L$(G4LIB)/$(G4SYSTEM) \
         $(patsubst lib%,-l%,$(patsubst %.lib,%,$(GLOBLIBS))) \
         -L$(CLHEP_LIB_DIR) -l$(CLHEP_LIB) $(INTYLIBS);
  endef
else
  define build-global-shared-lib
    @libdir=`(cd $(@D);/bin/pwd)`; \
     cd $(G4TMP)/$(G4SYSTEM); \
     g++ -dynamiclib -flat_namespace -undefined suppress  -dynamic -single_module -o $$libdir/$(@F) $(INTYLIBS) $(foreach dir,$(SUBLIBS),$(dir)/*.o);
  endef
endif

endif