#-------------------------------------------------------------------------
#
# Makefile.shlib
#    Common rules for building shared libraries
#
# Copyright (c) 1998, Regents of the University of California
#
# IDENTIFICATION
#    $Header: /cvsroot/pgsql/src/Makefile.shlib,v 1.47 2001/03/10 23:15:20 tgl Exp $
#
#-------------------------------------------------------------------------

# This file should be included by any Postgres module Makefile that
# wants to build a shared library (if possible for the current
# platform). A static library is also built from the same object
# files. Only one library can be built per makefile.
#
# Before including this file, the module Makefile must define these
# variables:
#
# NAME                  Name of library to build (no suffix nor "lib" prefix)
# SO_MAJOR_VERSION      Major version number to use for shared library
# SO_MINOR_VERSION      Minor version number to use for shared library
# OBJS                  List of object files to include in library
# SHLIB_LINK            If shared library relies on other libraries,
#                       additional stuff to put in its link command
# (If you want a patchlevel, include it in SO_MINOR_VERSION, e.g., "6.2".)
#
# The module Makefile must also include
# $(top_builddir)/src/Makefile.global before including this file.
# (Makefile.global sets PORTNAME and other needed symbols.)
#
# This makefile provides the following (phony) targets:
#
# all-lib               build the static and shared (if applicable) libraries
# install-lib           install the libraries into $(libdir)
# uninstall-lib         remove the libraries from $(libdir)
# clean-lib             delete the static and shared libraries from the build dir
#
# Since `all-lib' is the first rule in this file you probably want to
# have the `all' target before including this file. In the most simple
# case it would look like this:
#
#     all: all-lib
#
# Similarly, the install rule might look like
#
#     install: install-lib
#
# plus any additional things you want to install. Et cetera.
#
# Got that?  Look at src/interfaces/libpq/Makefile for an example.
#
# While the linker allows creation of most shared libraries,
# -Bsymbolic requires resolution of all symbols, making the
# compiler a better choice for shared library creation on ELF platforms.
# With the linker, -Bsymbolic requires the crt1.o startup object file.
# bjm 2001-02-10


ifndef cplusplus
COMPILER = $(CC) $(CFLAGS)
else
COMPILER = $(CXX) $(CXXFLAGS)
endif


# First, a few hacks for building *static* libraries.

LINK.static = $(AR) $(AROPT)

ifdef cplusplus

ifeq ($(PORTNAME), irix5)
  ifneq ($(GXX), yes)
    LINK.static = $(CXX) -ar -o
  endif
endif

ifeq ($(PORTNAME), solaris)
  ifneq ($(GXX), yes)
    LINK.static = $(CXX) -xar -o
  endif
endif

endif # cplusplus



ifeq ($(enable_shared), yes)

# For each platform we support shared libraries on, set shlib to the
# name of the library, LINK.shared to the command to link the library,
# and adjust SHLIB_LINK if necessary.

# Try to keep the sections in some kind of order, folks...

ifndef cplusplus
  override CFLAGS	+= $(CFLAGS_SL)
else
  ifndef CXXFLAGS_SL
    CXXFLAGS_SL = $(CFLAGS_SL)
  endif
  override CXXFLAGS	+= $(CXXFLAGS_SL)
endif

soname = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)

ifeq ($(PORTNAME), aix)
  shlib			:= lib$(NAME)$(DLSUFFIX)
  SHLIB_LINK		+= -lc
endif

ifeq ($(PORTNAME), darwin)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LINK.shared		= $(COMPILER) $(CFLAGS_SL)
endif

ifeq ($(PORTNAME), openbsd)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  ifdef ELF_SYSTEM
    LINK.shared		= $(COMPILER) -shared -Wl,-x,-soname,$(soname)
    SHLIB_LINK		+= -lc
  else
    LINK.shared		= $(LD) -x -Bshareable -Bforcearchive
  endif
endif

ifeq ($(PORTNAME), bsdi)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  ifeq ($(DLSUFFIX), .so)
    LINK.shared		= $(COMPILER) -shared -Wl,-x,-soname,$(soname)
    SHLIB_LINK		+= -lc
  endif
  ifeq ($(DLSUFFIX), .o)
    LINK.shared		= shlicc -O $(LDREL)
  endif
endif

ifeq ($(PORTNAME), freebsd)
  ifdef ELF_SYSTEM
    shlib		:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
    LINK.shared		= $(COMPILER) -shared -Wl,-x,-soname,$(soname)
    SHLIB_LINK		+= -lc
  else
    shlib		:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
    LINK.shared		= $(LD) -x -Bshareable -Bforcearchive
  endif
endif

ifeq ($(PORTNAME), netbsd)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  ifdef ELF_SYSTEM
    LINK.shared		= $(COMPILER) -shared -Wl,-x,-soname,$(soname)
  else
    LINK.shared		= $(LD) -x -Bshareable -Bforcearchive
  endif
endif

ifeq ($(PORTNAME), hpux)
# HPUX doesn't believe in version numbers for shlibs
  shlib			:= lib$(NAME)$(DLSUFFIX)
  LINK.shared		= $(LD) -b +b $(libdir) -Bsymbolic
endif

ifeq ($(PORTNAME), irix5)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
  LINK.shared		= $(COMPILER) -shared -Wl,-set_version,sgi$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
endif

ifeq ($(PORTNAME), linux)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LINK.shared		= $(COMPILER) -shared -Wl,-soname,$(soname)
endif

ifeq ($(PORTNAME), solaris)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LINK.shared		= $(COMPILER) -G
  ifeq ($(with_gnu_ld), yes)
    LINK.shared		+= -Wl,-soname,$(soname)
  else
    LINK.shared		+= -Wl,-h,$(soname)
  endif
  SHLIB_LINK		+= -lm -lc
endif

ifeq ($(PORTNAME), sunos4)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LINK.shared		= $(LD) -assert pure-text -Bdynamic
endif
 
ifeq ($(PORTNAME), osf)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LINK.shared		= $(LD) -shared -expect_unresolved '*'
endif

ifeq ($(PORTNAME), svr4)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LINK.shared		= $(LD) -G
endif

ifeq ($(PORTNAME), univel)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LINK.shared		= $(LD) -G -z text
endif

ifeq ($(PORTNAME), unixware)
  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  ifndef cplusplus
    ifeq ($(GCC), yes)
      LINK.shared	= $(CC) -shared
    else
      LINK.shared	= $(CC) -G
    endif
  else
    ifeq ($(GXX), yes)
      LINK.shared	= $(CXX) -shared
    else
      LINK.shared	= $(CXX) -G
    endif
  endif
  LINK.shared		+= -Wl,-z,text -Wl,-h,$(soname)
endif

ifeq ($(PORTNAME), win)
  shlib			:= $(NAME)$(DLSUFFIX)
  ifdef cplusplus
    SHLIB_LINK		+= --driver-name g++
  endif
endif

ifeq ($(PORTNAME), beos)
  shlib			:= lib$(NAME)$(DLSUFFIX)
  LINK.shared		= $(LD) -nostart
  SHLIB_LINK		+= -ltermcap -lstdc++.r4 -lbind -lsocket -L/boot/develop/lib/x86
endif

ifeq ($(enable_rpath), yes)
SHLIB_LINK += $(rpath)
endif

endif # enable_shared



##
## BUILD
##

.PHONY: all-lib
all-lib: lib$(NAME).a $(shlib)

ifneq ($(PORTNAME), win)

ifndef LORDER
MK_NO_LORDER := true
endif

lib$(NAME).a: $(OBJS)
ifdef MK_NO_LORDER
	$(LINK.static) $@ $^
else
	$(LINK.static) $@ `$(LORDER) $^ | tsort`
endif
	$(RANLIB) $@

endif # not win

ifeq ($(enable_shared), yes)

ifneq ($(PORTNAME), beos)
ifneq ($(PORTNAME), win)
ifneq ($(PORTNAME), aix)

# Normal case
$(shlib): $(OBJS)
	$(LINK.shared) $(OBJS) $(SHLIB_LINK) -o $@
# If we're using major and minor versions, then make a symlink to major-version-only.
ifneq ($(shlib), lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION))
	rm -f lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
	$(LN_S) $(shlib) lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
endif
# Make sure we have a link to a name without any version numbers
ifneq ($(shlib), lib$(NAME)$(DLSUFFIX))
	rm -f lib$(NAME)$(DLSUFFIX)
	$(LN_S) $(shlib) lib$(NAME)$(DLSUFFIX)
endif

else # PORTNAME == aix

# AIX case
$(shlib): lib$(NAME).a
	$(MKLDEXPORT) lib$(NAME).a > lib$(NAME)$(EXPSUFF)
	$(CC) -Wl,-H512 -Wl,-bM:SRE -Wl,-bI:$(top_builddir)/src/backend/$(POSTGRES_IMP) -Wl,-bE:lib$(NAME)$(EXPSUFF) -o $@ $< $(LDFLAGS) $(SHLIB_LINK)

endif # PORTNAME == aix

else # PORTNAME == win

# WIN case
$(shlib) lib$(NAME).a: $(OBJS) $(top_builddir)/src/utils/dllinit.o
	$(DLLTOOL) --export-all --output-def $(NAME).def $(OBJS)
	$(DLLWRAP) -o $(shlib) --dllname $(shlib) --def $(NAME).def $(OBJS) $(top_builddir)/src/utils/dllinit.o $(DLLINIT) $(DLLLIBS) $(SHLIB_LINK)
	$(DLLTOOL) --dllname $(shlib) --def $(NAME).def --output-lib lib$(NAME).a

$(top_builddir)/src/utils/dllinit.o: $(top_srcdir)/src/utils/dllinit.c
	$(MAKE) -C $(top_builddir)/src/utils dllinit.o

endif # PORTNAME == win

else # PORTNAME == beos

# BEOS case
$(shlib): $(OBJS)
	ln -fs $(top_srcdir)/src/backend/postgres _APP_
	$(CC) -Xlinker -soname=$@ $(LDFLAGS_SL) -o $@ _APP_ $(OBJS) $(SHLIB_LINK)

endif # PORTNAME == beos

endif # enable_shared


##
## INSTALL
##

.PHONY: install-lib install-lib-static install-lib-shared
install-lib: install-lib-static install-lib-shared

install-lib-static: lib$(NAME).a
	$(INSTALL_DATA) $< $(DESTDIR)$(libdir)/lib$(NAME).a

ifeq ($(enable_shared), yes)
install-lib-shared: $(shlib)
	$(INSTALL_SHLIB) $< $(DESTDIR)$(libdir)/$(shlib)
ifneq ($(PORTNAME), win)
ifneq ($(shlib), lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION))
	cd $(DESTDIR)$(libdir) && \
	rm -f lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION) && \
	$(LN_S) $(shlib) lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
endif
ifneq ($(shlib), lib$(NAME)$(DLSUFFIX))
	cd $(DESTDIR)$(libdir) && \
	rm -f lib$(NAME)$(DLSUFFIX) && \
	$(LN_S) $(shlib) lib$(NAME)$(DLSUFFIX)
endif

endif # not win
endif # enable_shared


##
## UNINSTALL
##

.PHONY: uninstall-lib
uninstall-lib:
	rm -f $(DESTDIR)$(libdir)/lib$(NAME).a
ifeq ($(enable_shared), yes)
	rm -f $(DESTDIR)$(libdir)/lib$(NAME)$(DLSUFFIX) \
	  $(DESTDIR)$(libdir)/lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION) \
	  $(DESTDIR)$(libdir)/lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
endif # enable_shared


##
## CLEAN
##

.PHONY: clean-lib
clean-lib:
	rm -f lib$(NAME).a
ifeq ($(enable_shared), yes)
	rm -f $(shlib) lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION) lib$(NAME)$(DLSUFFIX)
endif
ifeq ($(PORTNAME), win)
	rm -rf $(NAME).def
endif
