#-------------------------------------------------------------------------
#
# Makefile.shlib
#    Common rules for building shared libraries
#
# Copyright (c) 1998, Regents of the University of California
#
# IDENTIFICATION
#    $PostgreSQL: pgsql/src/Makefile.shlib,v 1.104 2006/04/28 02:53:20 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".)
#
# Optional flags when building DLL's (only applicable to win32 and cygwin
# platforms).
# DLLTOOL_DEFFLAGS      Additional flags when creating the dll .def file
# DLLTOOL_LIBFLAGS      Additional flags when creating the lib<module>.a file
# DLLWRAP_FLAGS         Additional flags to dllwrap
# DLL_DEFFILE           Use pre-existing .def file instead of auto-generating
#                       one with all exports in it (win32 only).
#
# 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


COMPILER = $(CC) $(CFLAGS)
LINK.static = $(AR) $(AROPT)



ifeq ($(enable_shared), yes)

# Insert -L from LDFLAGS after any -L already present in SHLIB_LINK
SHLIB_LINK := $(filter -L%, $(SHLIB_LINK)) $(filter -L%, $(LDFLAGS)) $(filter-out -L%, $(SHLIB_LINK))

# Need a -L-free version of LDFLAGS to use in combination with SHLIB_LINK
LDFLAGS_NO_L := $(filter-out -L%, $(LDFLAGS))

# Default shlib naming convention used by the majority of platforms
shlib		= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
shlib_major	= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
shlib_bare	= lib$(NAME)$(DLSUFFIX)

# For each platform we support shared libraries on, set shlib to the
# name of the library (if default above is not right), set
# 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...

override CFLAGS += $(CFLAGS_SL)

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

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

ifeq ($(PORTNAME), darwin)
  ifneq ($(SO_MAJOR_VERSION), 0)
    version_link	:= -compatibility_version $(SO_MAJOR_VERSION) -current_version $(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
  endif
  ifeq ($(DLTYPE), library)
    # linkable library
    DLSUFFIX		:= .dylib
    LINK.shared		= $(COMPILER) -dynamiclib -install_name $(libdir)/lib$(NAME).$(SO_MAJOR_VERSION)$(DLSUFFIX) $(version_link) $(exported_symbols_list) -multiply_defined suppress
  else
    # loadable module (default case)
    DLSUFFIX		:= .so
    LINK.shared		= $(COMPILER) -bundle -multiply_defined suppress
  endif
  shlib			= lib$(NAME).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)$(DLSUFFIX)
  shlib_major		= lib$(NAME).$(SO_MAJOR_VERSION)$(DLSUFFIX)
endif

ifeq ($(PORTNAME), openbsd)
  ifdef ELF_SYSTEM
    LINK.shared		= $(COMPILER) -shared -Wl,-x,-soname,$(soname)
    SHLIB_LINK		+= -lc
  else
    LINK.shared		= $(LD) -x -Bshareable -Bforcearchive
  endif
endif

ifeq ($(PORTNAME), bsdi)
  ifeq ($(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)
  else
    shlib		= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
    LINK.shared		= $(LD) -x -Bshareable -Bforcearchive
  endif
endif

ifeq ($(PORTNAME), netbsd)
  ifdef ELF_SYSTEM
    LINK.shared		= $(COMPILER) -shared -Wl,-x,-soname,$(soname)
  else
    LINK.shared		= $(LD) -x -Bshareable -Bforcearchive
  endif
endif

ifeq ($(PORTNAME), hpux)
  shlib			= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
  ifeq ($(with_gnu_ld), yes)
    LINK.shared		= $(CC) $(LDFLAGS_NO_L) -shared -Wl,-h -Wl,$(soname)
  else
    # can't use the CC-syntax rpath pattern here
    rpath =
    ifeq ($(enable_rpath), yes)
      LINK.shared	= $(LD) +h $(soname) -b +b '$(rpathdir)'
    else
      LINK.shared	= $(LD) +h $(soname) -b
    endif
    # On HPUX platforms, gcc is usually configured to search for libraries
    # in /usr/local/lib, but ld won't do so.  Add an explicit -L switch so
    # ld can find the same libraries gcc does.  Make sure it goes after any
    # -L switches provided explicitly.
    ifeq ($(GCC), yes)
      SHLIB_LINK := $(filter -L%, $(SHLIB_LINK)) -L/usr/local/lib $(filter-out -L%, $(SHLIB_LINK))
    endif
  endif
  # do this last so above filtering doesn't pull out -L switches in LDFLAGS
  ifeq ($(GCC), yes)
    SHLIB_LINK		+= `$(CC) $(LDFLAGS) -print-libgcc-file-name`
  endif
endif

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

ifeq ($(PORTNAME), linux)
  LINK.shared		= $(COMPILER) -shared -Wl,-soname,$(soname) $(exported_symbols_list)
endif

ifeq ($(PORTNAME), solaris)
  ifeq ($(GCC), yes)
    LINK.shared		= $(CC) -shared
  else
    LINK.shared		= $(CC) -G $(CFLAGS)	# CFLAGS added for X86_64
  endif
  ifeq ($(with_gnu_ld), yes)
    LINK.shared		+= -Wl,-soname,$(soname)
  else
    LINK.shared		+= -h $(soname)
  endif
endif

ifeq ($(PORTNAME), sunos4)
  LINK.shared		= $(LD) -assert pure-text -Bdynamic
endif
 
ifeq ($(PORTNAME), osf)
  LINK.shared		= $(LD) -shared -expect_unresolved '*'
endif

ifeq ($(PORTNAME), sco)
  ifeq ($(GCC), yes)
    LINK.shared		= $(CC) -shared
  else
    LINK.shared		= $(CC) -G
    endif
  LINK.shared		+= -Wl,-z,text -Wl,-h,$(soname)
endif

ifeq ($(PORTNAME), svr4)
  LINK.shared		= $(LD) -G
endif

ifeq ($(PORTNAME), univel)
  LINK.shared		= $(LD) -G -z text
endif

ifeq ($(PORTNAME), unixware)
  ifeq ($(GCC), yes)
    LINK.shared		= $(CC) -shared
  else
    LINK.shared		= $(CC) -G
  endif
  LINK.shared		+= -Wl,-z,text -Wl,-h,$(soname) 
endif

ifeq ($(PORTNAME), cygwin)
  shlib			= cyg$(NAME)$(DLSUFFIX)
  haslibarule   = yes
endif

ifeq ($(PORTNAME), win32)
  shlib			= lib$(NAME)$(DLSUFFIX)
  haslibarule   = yes
endif

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

endif # enable_shared



##
## BUILD
##

.PHONY: all-lib all-static-lib all-shared-lib

all-lib: all-static-lib all-shared-lib

all-static-lib: lib$(NAME).a

all-shared-lib: $(shlib)

ifndef haslibarule
lib$(NAME).a: $(OBJS)
	$(LINK.static) $@ $^
	$(RANLIB) $@
endif #haslibarule

ifeq ($(enable_shared), yes)

ifneq ($(PORTNAME), win32)
ifneq ($(PORTNAME), cygwin)
ifneq ($(PORTNAME), aix)

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

else # PORTNAME == aix

# AIX case
$(shlib): lib$(NAME).a
	$(MKLDEXPORT) lib$(NAME).a > lib$(NAME)$(EXPSUFF)
	$(COMPILER) $(LDFLAGS_NO_L) $(LDFLAGS_SL) -o $@ $< -Wl,-bE:lib$(NAME)$(EXPSUFF) $(SHLIB_LINK)
	
endif # PORTNAME == aix

else # PORTNAME == cygwin

# Cygwin case
$(shlib) lib$(NAME).a: $(OBJS)
ifndef DLL_DEFFILE
	$(DLLTOOL) --export-all $(DLLTOOL_DEFFLAGS) --output-def $(NAME).def $(OBJS)
	$(DLLWRAP) $(LDFLAGS_SL) -o $(shlib) --dllname $(shlib) $(DLLWRAP_FLAGS) --def $(NAME).def $(OBJS) $(SHLIB_LINK)
	$(DLLTOOL) --dllname $(shlib) $(DLLTOOL_LIBFLAGS) --def $(NAME).def --output-lib lib$(NAME).a
else
	$(DLLWRAP) $(LDFLAGS_SL) -o $(shlib) --dllname $(shlib) $(DLLWRAP_FLAGS) --def $(DLL_DEFFILE) $(OBJS) $(SHLIB_LINK)
	$(DLLTOOL) --dllname $(shlib) $(DLLTOOL_LIBFLAGS) --def $(DLL_DEFFILE) --output-lib lib$(NAME).a
endif

endif # PORTNAME == cygwin

else # PORTNAME == win32

# win32 case
$(shlib) lib$(NAME).a: $(OBJS)
ifndef DLL_DEFFILE
	$(DLLTOOL) --export-all $(DLLTOOL_DEFFLAGS) --output-def $(NAME).def $(OBJS)
	$(DLLWRAP) $(LDFLAGS_SL) -o $(shlib) --dllname $(shlib) $(DLLWRAP_FLAGS) --def $(NAME).def $(OBJS) $(SHLIB_LINK)
	$(DLLTOOL) --dllname $(shlib) $(DLLTOOL_LIBFLAGS) --def $(NAME).def --output-lib lib$(NAME).a
else
	$(DLLWRAP) $(LDFLAGS_SL) -o $(shlib) --dllname $(shlib) $(DLLWRAP_FLAGS) --def $(DLL_DEFFILE) $(OBJS) $(SHLIB_LINK)
	$(DLLTOOL) --dllname $(shlib) $(DLLTOOL_LIBFLAGS) --def $(DLL_DEFFILE) --output-lib lib$(NAME).a
endif

endif # PORTNAME == win32

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_STLIB) $< '$(DESTDIR)$(libdir)/lib$(NAME).a'
ifeq ($(PORTNAME), darwin)
	cd '$(DESTDIR)$(libdir)' && \
	ranlib lib$(NAME).a
endif

ifeq ($(enable_shared), yes)
install-lib-shared: $(shlib)
	$(INSTALL_SHLIB) $< '$(DESTDIR)$(libdir)/$(shlib)'
ifneq ($(PORTNAME), cygwin)
ifneq ($(PORTNAME), win32)
ifneq ($(shlib), $(shlib_major))
	cd '$(DESTDIR)$(libdir)' && \
	rm -f $(shlib_major) && \
	$(LN_S) $(shlib) $(shlib_major)
endif
ifneq ($(shlib), $(shlib_bare))
	cd '$(DESTDIR)$(libdir)' && \
	rm -f $(shlib_bare) && \
	$(LN_S) $(shlib) $(shlib_bare)
endif
endif # not win32
endif # not cygwin
endif # enable_shared


##
## UNINSTALL
##

.PHONY: uninstall-lib
uninstall-lib:
	rm -f '$(DESTDIR)$(libdir)/lib$(NAME).a'
ifeq ($(enable_shared), yes)
	rm -f '$(DESTDIR)$(libdir)/$(shlib_bare)' \
	  '$(DESTDIR)$(libdir)/$(shlib_major)' \
	  '$(DESTDIR)$(libdir)/$(shlib)'
endif # enable_shared


##
## CLEAN
##

.PHONY: clean-lib
clean-lib:
	rm -f lib$(NAME).a
ifeq ($(enable_shared), yes)
	rm -f $(shlib_bare) $(shlib_major) $(shlib)
ifdef EXPSUFF
	rm -f lib$(NAME)$(EXPSUFF)
endif
endif
ifeq ($(PORTNAME), cygwin)
	rm -f $(NAME).dll $(NAME).def
endif

ifeq ($(PORTNAME), win32)
	rm -f $(NAME).dll $(NAME).def
endif
