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# Rules to build signal interposition library, used by vm.make

# libjsig[_g].so: signal interposition library
JSIG   = jsig
JSIG_G = $(JSIG)$(G_SUFFIX)

ifeq ($(OS_VENDOR), Darwin)
  LIBJSIG   = lib$(JSIG).dylib
  LIBJSIG_G = lib$(JSIG_G).dylib
else
  LIBJSIG   = lib$(JSIG).so
  LIBJSIG_G = lib$(JSIG_G).so
endif

JSIGSRCDIR = $(GAMMADIR)/src/os/$(Platform_os_family)/vm

DEST_JSIG  = $(JDK_LIBDIR)/$(LIBJSIG)

LIBJSIG_MAPFILE = $(MAKEFILES_DIR)/mapfile-vers-jsig

# On Bsd we really dont want a mapfile, as this library is small 
# and preloaded using LD_PRELOAD, making functions private will 
# cause problems with interposing. See CR: 6466665
# LFLAGS_JSIG += $(MAPFLAG:FILENAME=$(LIBJSIG_MAPFILE))

LFLAGS_JSIG += -D_GNU_SOURCE -pthread $(LDFLAGS_HASH_STYLE)

ifneq ($(OS_VENDOR), Darwin)
# Create a RELRO section for memory segments that should be read-only after relocation
LFLAGS_JSIG += -Xlinker -z -Xlinker relro
endif

# DEBUG_BINARIES overrides everything, use full -g debug information
ifeq ($(DEBUG_BINARIES), true)
  JSIG_DEBUG_CFLAGS = -g
endif

$(LIBJSIG): $(JSIGSRCDIR)/jsig.c $(LIBJSIG_MAPFILE)
	@echo Making signal interposition lib...
	$(QUIETLY) $(CC) $(SYMFLAG) $(ARCHFLAG) $(SHARED_FLAG) $(PICFLAG) \
                         $(LFLAGS_JSIG) $(JSIG_DEBUG_CFLAGS) -o $@ $<
	$(QUIETLY) [ -f $(LIBJSIG_G) ] || { ln -s $@ $(LIBJSIG_G); }

install_jsig: $(LIBJSIG)
	@echo "Copying $(LIBJSIG) to $(DEST_JSIG)"
	$(QUIETLY) cp -f $(LIBJSIG) $(DEST_JSIG) && echo "Done"

.PHONY: install_jsig