#
# ------ GNU/LINUX ------    !!! not supported !!!
#                    Red-Hat 6.1, egcs-1.1.2 (gcc-2.91.66)
ifeq ($(G4SYSTEM),Linux-egcs)
  CXX       := g++
  CXXFLAGS  := -pipe
  ifdef G4OPTIMISE
    CXXFLAGS  += -O
    FCFLAGS   := -O
    CCFLAGS   := -O
  else
    ifdef G4DEBUG
      CXXFLAGS  += -g
      FCFLAGS   := -g
      CCFLAGS   := -g
    endif
  endif
  ifdef G4PROFILE
    CXXFLAGS  += -pg
    FCFLAGS   += -pg
    CCFLAGS   += -pg
  endif
  ifdef G4LIB_BUILD_SHARED
    CXXFLAGS  += -fPIC
    FCFLAGS   += -fPIC
    CCFLAGS   += -fPIC
  endif
  G4RUNPATHOPTION := -Wl,-rpath 
  FC := g77
  FCFLAGS += -fno-automatic -fno-backslash -fno-second-underscore
  FCLIBS := -lg2c -lnsl
  ECHO    := /bin/echo -e
  SHEXT   := so
  ifndef X11FLAGS
    X11FLAGS  := -I/usr/include/X11/extensions -I/usr/include/X11
  endif
  ifndef X11LIBS
    X11LIBS   := -L/usr/X11R6/lib  -lXmu -lXt -lXext -lX11 -lSM -lICE
  endif
  ifndef XMFLAGS
    XMFLAGS   := -I/usr/X11R6/include
  endif
  ifndef XMLIBS
    XMLIBS    := -lXm -lXpm
  endif
  ifndef XAWFLAGS
    XAWFLAGS   := -I/usr/X11R6/include
  endif
  ifndef XAWLIBS
    XAWLIBS    := -lXaw
  endif
  DLDLIBS   := -ldl
  ifndef OGLFLAGS
    OGLFLAGS  := -I$(OGLHOME)/include 
  endif
  ifndef OGLLIBS
    OGLLIBS   := -L$(OGLHOME)/lib -lGLU -lGL
  endif
  define build-granular-shared-lib
    @libdir=`(cd $(@D);/bin/pwd)`; \
     cd $(G4TMPDIR); \
     $(CXX) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) *.o
  endef
  define build-global-shared-lib
    @libdir=`(cd $(@D);/bin/pwd)`; \
     cd $(G4TMP)/$(G4SYSTEM); \
     $(CXX) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) \
                    $(foreach dir,$(SUBLIBS),$(dir)/*.o);
  endef

endif