#-------------------------------------------------------------------------
#
# 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 1.2 1998/10/28 06:49:04 thomas 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.
# RESTRICTION: 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, eg, "6.2".)
#
# The module Makefile must also include $(SRCDIR)/Makefile.global before
# including this file (Makefile.global sets PORTNAME and other needed symbols).
#
# The first rule in this file is a rule for "all", which causes both the
# static and shared libraries to be built (as well as all the object files).
# If you have other files that need to be made before building object files
# and libraries, put another rule for "all" before you include this file.
#
# Your install rule should look like
#
#	install: install-headers install-lib $(install-shlib-dep)
#
# where install-headers is only needed if you have header files to install
# (and, of course, it has to be provided by your makefile).  The rules
# install-lib and install-shlib are provided by this makefile --- they
# automatically install the plain and shared libraries into $(LIBDIR).
# install-shlib-dep is a variable that expands to install-shlib if the
# shared library needs to be installed, empty if not.
#
# Got that?  Look at src/interfaces/libpq/Makefile.in for an example.


# shlib and install-shlib-dep default to empty, and stay that way if we're
# on a platform where we don't know how to build a shared library.
shlib := 
install-shlib-dep :=

# For each platform we support shlibs on, set shlib and install-shlib-dep,
# and update flags as needed to build a shared lib.  Note we depend on
# Makefile.global (or really Makefile.port) to supply DLSUFFIX and other
# symbols.

ifeq ($(PORTNAME), bsd)
  ifdef BSD_SHLIB
    install-shlib-dep	:= install-shlib
    shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
    LDFLAGS_SL			:= -x -Bshareable -Bforcearchive
    CFLAGS				+= $(CFLAGS_SL)
  endif
endif

ifeq ($(PORTNAME), bsdi)
  ifdef BSD_SHLIB
    ifeq ($(DLSUFFIX), .so)
      install-shlib-dep := install-shlib
      shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
      LDFLAGS_SL		+= -shared
      CFLAGS			+= $(CFLAGS_SL)
    endif
    ifeq ($(DLSUFFIX), .o)
      install-shlib-dep	:= install-shlib
      shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
      LD				:= shlicc
      LDFLAGS_SL	 	+= -O -r
      CFLAGS			+= $(CFLAGS_SL)
    endif
  endif
endif

ifeq ($(PORTNAME), hpux)
  install-shlib-dep	:= install-shlib
# HPUX doesn't believe in version numbers for shlibs
  shlib				:= lib$(NAME)$(DLSUFFIX)
  LDFLAGS_SL		:= -b
  CFLAGS			+= $(CFLAGS_SL)
endif

ifeq ($(PORTNAME), linux)
  install-shlib-dep	:= install-shlib
  shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LDFLAGS_SL		:= -shared -soname $(shlib)
  LDFLAGS_ODBC		:= -Bsymbolic -lc -lm
  CFLAGS			+= $(CFLAGS_SL)
endif

ifeq ($(PORTNAME), solaris_i386)
  install-shlib-dep	:= install-shlib
  shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LDFLAGS_SL		:= -G
  CFLAGS			+= $(CFLAGS_SL)
endif

ifeq ($(PORTNAME), solaris_sparc)
  install-shlib-dep	:= install-shlib
  shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LDFLAGS_SL		:= -G
  CFLAGS			+= $(CFLAGS_SL)
endif

ifeq ($(PORTNAME), svr4)
  install-shlib-dep	:= install-shlib
  shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LDFLAGS_SL		:= -G
  CFLAGS			+= $(CFLAGS_SL)
endif

ifeq ($(PORTNAME), univel)
  install-shlib-dep	:= install-shlib
  shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LDFLAGS_SL		:= -G -z text
  CFLAGS			+= $(CFLAGS_SL)
  ifeq ($(CXX), CC)
    CXXFLAGS += -Xw
    COMPILE.cc = $(CXX) $(CXXFLAGS:ll,alloca=ll) $(CPPFLAGS) $(TARGET_ARCH) -c
  endif
endif

ifeq ($(PORTNAME), unixware)
  install-shlib-dep	:= install-shlib
  shlib				:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  LDFLAGS_SL		:= -G -z text
  CFLAGS			+= $(CFLAGS_SL)
  ifeq ($(CXX), CC)
    CXXFLAGS += -Xw
    COMPILE.cc = $(CXX) $(CXXFLAGS:ll,alloca=ll) $(CPPFLAGS) $(TARGET_ARCH) -c
  endif
endif


# Default target definition.  Note shlib is empty if not building a shlib.

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

# Rules to build regular and shared libraries

lib$(NAME).a: $(OBJS)
ifdef MK_NO_LORDER
	$(AR) $(AROPT) $@ $(OBJS) 
else
	$(AR) $(AROPT) $@ `lorder $(OBJS) | tsort`
endif
	$(RANLIB) $@

$(shlib): $(OBJS)
	$(LD) $(LDFLAGS_SL) -o $@ $(OBJS) $(SHLIB_LINK)

# Rules to install regular and shared libraries

.PHONY: all install-lib install-shlib

install-lib: lib$(NAME).a
	$(INSTALL) $(INSTL_LIB_OPTS) lib$(NAME).a $(LIBDIR)/lib$(NAME).a

install-shlib: $(shlib)
	$(INSTALL) $(INSTL_SHLIB_OPTS) $(shlib) $(LIBDIR)/$(shlib)
	if [ "$(shlib)" != "lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)" ]; then \
		cd $(LIBDIR); \
		rm -f lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION); \
		$(LN_S) $(shlib) lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION); \
	fi
	if [ "$(shlib)" != "lib$(NAME)$(DLSUFFIX)" ]; then \
		cd $(LIBDIR); \
		rm -f lib$(NAME)$(DLSUFFIX); \
		$(LN_S) $(shlib) lib$(NAME)$(DLSUFFIX); \
	fi