source: trunk/openjdk/jdk/make/common/Mapfile-vers.gmk

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#
# Makefile for linking with mapfiles.
#
# NOTE: Not using a mapfile will expose all your extern functions and
#       extern data symbols as part of your interface, so unless your
#       extern names are safe from being mistaken as names from other
#       libraries, you better use a mapfile, or use a unique naming
#       convention on all your extern symbols.
#
# The mapfile will establish versioning by defining the exported interface.
#
# The mapfile can also force certain .o files or elf sections into the 
#   the different segments of the resulting library/program image.
#
# The macro FILES_m can contain any number of mapfiles.
#

# Always make sure 'all' is the default rule
mapfile_default_rule: all

ifeq ($(PLATFORM), solaris)

ifeq ($(VARIANT), OPT)
  # OPT build MUST have a mapfile?
  ifndef FILES_m
    FILES_m =        mapfile-vers
  endif
  
  # If we are re-ordering functions in this solaris library, we need to make
  #   sure that -xF is added to the compile lines. This option is critical and
  #   enables the functions to be reordered.
  ifdef FILES_reorder
    CFLAGS_OPT   += -xF
    CXXFLAGS_OPT += -xF
  endif

INIT += $(TEMPDIR)/mapfile-vers

$(TEMPDIR)/mapfile-vers : $(FILES_m) $(FILES_reorder)
        $(prep-target)
        $(CAT) $(FILES_m) > $@
  ifdef FILES_reorder
        $(SED) -e 's=OUTPUTDIR=$(OUTPUTDIR)=' $(FILES_reorder) >> $@
  endif
endif # VARIANT

ifndef LDNOMAP
  LDMAPFLAGS_OPT =  -M$(TEMPDIR)/mapfile-vers
  LDMAPFLAGS_DBG =  $(FILES_m:%=-M%)
endif

endif # PLATFORM


ifeq ($(PLATFORM), linux)

ifeq ($(VARIANT), OPT)
  # OPT build MUST have a mapfile?
  ifndef FILES_m
    FILES_m =        mapfile-vers
  endif
endif # VARIANT

ifndef LDNOMAP
  LDMAPFLAGS_OPT =  $(FILES_m:%=-Xlinker -version-script=%)
  LDMAPFLAGS_DBG =  $(FILES_m:%=-Xlinker -version-script=%)
endif

endif # PLATFORM
  
LDFLAGS_OPT +=  $(LDMAPFLAGS_OPT)
LDFLAGS_DBG +=  $(LDMAPFLAGS_DBG)