# $Id$
#
# special rules for ELF so linker invocation.
#
# Variables:
#
# prefix      ... install prefix
# DESTDIR     ... temporary destination directory, where prefix resides. (Used by debian and rpm packagers)
# LD          ... path of linker (either CC or CXX)
# OBJS        ... objet files to be linked in.
# EXT_LIBS    ... pkg-config detected libraries.
# LIBS        ... list of optional additional libraries
# SILENT_LIBS ... optional list of additional libraries, which are not propagated to pkg-config's .pc-file
# LDFLAGS     ... Additional linker flags
# ARTIFACT    ... The name of the build artifact
# ABI_VERSION ... Version of the ABI for shared libraries.
# NODEVRULES  ... If non-empty don't generate install-dev rules.
# LIBSUBDIR   ... subdirectory where executable should be installed.
#                 Will be set to $(ARCHLIBSUBDIR) or as a last fallback to'lib' if empty.
#                 (Sometimes may be 'lib/foo' or 'lib64')
# SOPERMS     ... permission of installed .so.<version> files.
#                 Default is 644 under debian and 755 under redhat.
#

TARGET=lib$(ARTIFACT).so.$(ABI_VERSION)
TARGET2=lib$(ARTIFACT).so

ifeq ($(LIBSUBDIR),)
ifeq ($(ARCHLIBSUBDIR),)
LIBSUBDIR=lib
else
LIBSUBDIR=$(ARCHLIBSUBDIR)
endif
endif

ifeq ($(SOPERMS),)
SOPERMS=$(shell test -f /etc/redhat-release && echo 755 || echo 644)
endif

$(TARGET) $(TARGET2): $(OBJS)
	rm -f $(TARGET2)
	$(LD) -shared -Wl,-soname=$(TARGET) $(LDFLAGS) $(OBJS) $(SILENT_LIBS) $(LIBS) $(EXT_LIBS) -o $(TARGET)
	ln -s $(TARGET) $(TARGET2)

link:: $(TARGET) $(TARGET2)

install-bin:: $(TARGET)
	mkdir -p $(DESTDIR)$(prefix)/$(LIBSUBDIR)
	install -m $(SOPERMS) -p $(TARGET) $(DESTDIR)$(prefix)/$(LIBSUBDIR)

ifeq ($(NODEVRULES),)
install-dev:: $(TARGET2)
	mkdir -p $(DESTDIR)$(prefix)/$(LIBSUBDIR)
	cp -d --preserve=timestamps $(TARGET2) $(DESTDIR)$(prefix)/$(LIBSUBDIR)
endif

clean::
	rm -f $(TARGET) $(TARGET2)