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postgresql/src/Makefile.shlib
Tom Lane abe423712a Stop using "-multiply_defined suppress" on macOS. 
We started to use this linker switch in commit 9df308697 of
2004-07-13, which was in the OS X 10.3 era.  Apparently it's been a
no-op since around OS X 10.9.  Apple's most recent toolchain version
actively complains about it, so it's time to get rid of it.

Discussion: https://postgr.es/m/467042.1695766998@sss.pgh.pa.us
2023-09-26 21:06:21 -04:00

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Makefile
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#-------------------------------------------------------------------------
#
# Makefile.shlib
# Common rules for building shared libraries
#
# Copyright (c) 1998, Regents of the University of California
#
# IDENTIFICATION
# src/Makefile.shlib
#
#-------------------------------------------------------------------------
# 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)
# OBJS List of object files to include in library
# SHLIB_LINK Stuff to append to library's link command
# (typically, -L and -l switches for external libraries)
# SHLIB_LINK_INTERNAL -L and -l switches for Postgres-supplied libraries
# SHLIB_PREREQS Order-only prerequisites for library build target
# SHLIB_EXPORTS (optional) Name of file containing list of symbols to
# export, in the format "function_name number"
#
# Don't use SHLIB_LINK for references to files in the build tree, or the
# wrong things will happen --- use SHLIB_LINK_INTERNAL for those!
#
# When building a shared library, the following version information
# must also be set. It should be omitted when building a dynamically
# loadable module.
#
# SO_MAJOR_VERSION Major version number to use for shared library
# SO_MINOR_VERSION Minor version number to use for shared library
# (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)
# installdirs-lib create installation directory $(libdir)
# uninstall-lib remove the libraries from $(libdir)
# clean-lib delete the static and shared libraries from the build dir
# maintainer-clean-lib delete .def files built for win32
#
# Typically you would add `all-lib' to the `all' target so that `make all'
# builds the libraries. 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.
#
COMPILER = $(CC) $(CFLAGS)
LINK.static = $(AR) $(AROPT)
LDFLAGS_INTERNAL += $(SHLIB_LINK_INTERNAL)
ifdef SO_MAJOR_VERSION
# Default library naming convention used by the majority of platforms
shlib = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
shlib_major = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
shlib_bare = lib$(NAME)$(DLSUFFIX)
# Testing the soname variable is a reliable way to determine whether a
# linkable library is being built.
soname = $(shlib_major)
pkgconfigdir = $(libdir)/pkgconfig
else
# Naming convention for dynamically loadable modules
shlib = $(NAME)$(DLSUFFIX)
endif
stlib = lib$(NAME).a
ifndef soname
# additional flags for backend modules
SHLIB_LINK += $(BE_DLLLIBS)
endif
# 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)
override CXXFLAGS += $(CFLAGS_SL)
ifdef SO_MAJOR_VERSION
# libraries ought to use this to refer to versioned gettext domain names
override CPPFLAGS += -DSO_MAJOR_VERSION=$(SO_MAJOR_VERSION)
endif
ifeq ($(PORTNAME), aix)
ifdef SO_MAJOR_VERSION
shlib = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
endif
haslibarule = yes
# $(exports_file) is also usable as an import file
exports_file = lib$(NAME).exp
endif
ifeq ($(PORTNAME), darwin)
ifdef soname
# linkable library
DLSUFFIX = .dylib
ifneq ($(SO_MAJOR_VERSION), 0)
version_link = -compatibility_version $(SO_MAJOR_VERSION) -current_version $(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
endif
LINK.shared = $(COMPILER) -dynamiclib -install_name '$(libdir)/lib$(NAME).$(SO_MAJOR_VERSION)$(DLSUFFIX)' $(version_link) $(exported_symbols_list)
shlib = lib$(NAME).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)$(DLSUFFIX)
shlib_major = lib$(NAME).$(SO_MAJOR_VERSION)$(DLSUFFIX)
else
# loadable module
DLSUFFIX = .so
LINK.shared = $(COMPILER) -bundle
endif
BUILD.exports = $(AWK) '/^[^\#]/ {printf "_%s\n",$$1}' $< >$@
exports_file = $(SHLIB_EXPORTS:%.txt=%.list)
ifneq (,$(exports_file))
exported_symbols_list = -exported_symbols_list $(exports_file)
endif
endif
ifeq ($(PORTNAME), openbsd)
ifdef ELF_SYSTEM
LINK.shared = $(COMPILER) -shared
ifdef soname
LINK.shared += -Wl,-x,-soname,$(soname)
endif
BUILD.exports = ( echo '{ global:'; $(AWK) '/^[^\#]/ {printf "%s;\n",$$1}' $<; echo ' local: *; };' ) >$@
exports_file = $(SHLIB_EXPORTS:%.txt=%.list)
ifneq (,$(exports_file))
LINK.shared += -Wl,--version-script=$(exports_file)
endif
SHLIB_LINK += -lc
else
LINK.shared = $(LD) -x -Bshareable -Bforcearchive
endif
endif
ifeq ($(PORTNAME), freebsd)
ifdef ELF_SYSTEM
ifdef SO_MAJOR_VERSION
shlib = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
endif
LINK.shared = $(COMPILER) -shared
ifdef soname
LINK.shared += -Wl,-x,-soname,$(soname)
endif
BUILD.exports = ( echo '{ global:'; $(AWK) '/^[^\#]/ {printf "%s;\n",$$1}' $<; echo ' local: *; };' ) >$@
exports_file = $(SHLIB_EXPORTS:%.txt=%.list)
ifneq (,$(exports_file))
LINK.shared += -Wl,--version-script=$(exports_file)
endif
else
ifdef SO_MAJOR_VERSION
shlib = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
endif
LINK.shared = $(LD) -x -Bshareable -Bforcearchive
endif
endif
ifeq ($(PORTNAME), netbsd)
ifdef ELF_SYSTEM
LINK.shared = $(COMPILER) -shared
ifdef soname
LINK.shared += -Wl,-x,-soname,$(soname)
endif
BUILD.exports = ( echo '{ global:'; $(AWK) '/^[^\#]/ {printf "%s;\n",$$1}' $<; echo ' local: *; };' ) >$@
exports_file = $(SHLIB_EXPORTS:%.txt=%.list)
ifneq (,$(exports_file))
LINK.shared += -Wl,--version-script=$(exports_file)
endif
else
LINK.shared = $(LD) -x -Bshareable -Bforcearchive
endif
endif
ifeq ($(PORTNAME), hpux)
ifdef SO_MAJOR_VERSION
shlib = lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)
endif
ifeq ($(with_gnu_ld), yes)
LINK.shared = $(CC) -shared -Wl,-Bsymbolic
ifdef soname
LINK.shared += -Wl,-h -Wl,$(soname)
endif
else
LINK.shared = $(LD) -b -Bsymbolic
ifdef soname
LINK.shared += +h $(soname)
endif
# can't use the CC-syntax rpath pattern here, so instead:
rpath =
ifeq ($(enable_rpath), yes)
LINK.shared += +s +b '$(rpathdir)'
endif
# On HPUX platforms, gcc is usually configured to search for libraries
# in /usr/local/lib, but ld won't do so. Add an explicit -L switch so
# ld can find the same libraries gcc does. Make sure it goes after any
# -L switches provided explicitly.
ifeq ($(GCC), yes)
SHLIB_LINK += -L/usr/local/lib
endif
endif
# And we need to link with libgcc, too
ifeq ($(GCC), yes)
SHLIB_LINK += `$(CC) $(LDFLAGS) -print-libgcc-file-name`
endif
endif
ifeq ($(PORTNAME), linux)
LINK.shared = $(COMPILER) -shared
ifdef soname
LINK.shared += -Wl,-soname,$(soname)
endif
BUILD.exports = ( echo '{ global:'; $(AWK) '/^[^\#]/ {printf "%s;\n",$$1}' $<; echo ' local: *; };' ) >$@
exports_file = $(SHLIB_EXPORTS:%.txt=%.list)
ifneq (,$(exports_file))
LINK.shared += -Wl,--version-script=$(exports_file)
endif
endif
ifeq ($(PORTNAME), solaris)
ifeq ($(GCC), yes)
LINK.shared = $(COMPILER) -shared -Wl,-Bsymbolic
else
LINK.shared = $(COMPILER) -G -Bsymbolic
endif
ifdef soname
ifeq ($(with_gnu_ld), yes)
LINK.shared += -Wl,-soname,$(soname)
else
LINK.shared += -h $(soname)
endif
endif
endif
ifeq ($(PORTNAME), cygwin)
LINK.shared = $(CC) -shared
ifdef SO_MAJOR_VERSION
shlib = cyg$(NAME)$(DLSUFFIX)
endif
haslibarule = yes
endif
ifeq ($(PORTNAME), win32)
ifdef SO_MAJOR_VERSION
shlib = lib$(NAME)$(DLSUFFIX)
endif
haslibarule = yes
endif
##
## BUILD
##
.PHONY: all-lib all-static-lib all-shared-lib
all-lib: all-shared-lib
ifdef soname
# no static library when building a dynamically loadable module
all-lib: all-static-lib
all-lib: lib$(NAME).pc
endif
all-static-lib: $(stlib)
all-shared-lib: $(shlib)
# In this rule, "touch $@" works around a problem on some platforms wherein
# ranlib updates the library file's mod time with a value calculated to
# seconds precision. If the filesystem has sub-second timestamps, this can
# cause the library file to appear older than its input files, triggering
# parallel-make problems.
ifndef haslibarule
$(stlib): $(OBJS) | $(SHLIB_PREREQS)
rm -f $@
$(LINK.static) $@ $^
$(RANLIB) $@
touch $@
endif #haslibarule
ifeq (,$(filter cygwin win32,$(PORTNAME)))
ifneq ($(PORTNAME), aix)
# Normal case
$(shlib): $(OBJS) | $(SHLIB_PREREQS)
$(LINK.shared) -o $@ $(OBJS) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK)
ifdef shlib_major
# If we're using major and minor versions, then make a symlink to major-version-only.
ifneq ($(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) $(shlib_bare)
endif
endif # shlib_major
# Where possible, restrict the symbols exported by the library to just the
# official list, so as to avoid unintentional ABI changes. On recent macOS
# this also quiets multiply-defined-symbol warnings in programs that use
# libpgport along with libpq.
ifneq (,$(SHLIB_EXPORTS))
ifdef BUILD.exports
$(shlib): $(SHLIB_EXPORTS:%.txt=%.list)
$(SHLIB_EXPORTS:%.txt=%.list): %.list: %.txt
$(BUILD.exports)
endif
endif
else # PORTNAME == aix
# AIX case
# See notes in src/backend/parser/Makefile about the following two rules
$(stlib): $(shlib)
touch $@
$(shlib): $(OBJS) | $(SHLIB_PREREQS)
rm -f $(stlib)
$(LINK.static) $(stlib) $^
$(RANLIB) $(stlib)
$(MKLDEXPORT) $(stlib) $(shlib) >$(exports_file)
$(COMPILER) -o $(shlib) $(stlib) -Wl,-bE:$(exports_file) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK)
rm -f $(stlib)
$(AR) $(AROPT) $(stlib) $(shlib)
endif # PORTNAME == aix
else # PORTNAME == cygwin || PORTNAME == win32
ifeq ($(PORTNAME), cygwin)
# Cygwin case
$(shlib): $(OBJS) | $(SHLIB_PREREQS)
$(CC) $(CFLAGS) -shared -o $@ -Wl,--out-implib=$(stlib) $(OBJS) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) $(LDAP_LIBS_BE)
# see notes in src/backend/parser/Makefile about use of this type of rule
$(stlib): $(shlib)
touch $@
else
# Win32 case
# See notes in src/backend/parser/Makefile about the following two rules
$(stlib): $(shlib)
touch $@
# XXX A backend that loads a module linked with libgcc_s_dw2-1.dll will exit
# uncleanly, hence -static-libgcc. (Last verified with MinGW-w64 compilers
# from i686-4.9.1-release-win32-dwarf-rt_v3-rev1.) Shared libgcc has better
# support for C++/Java exceptions; while core PostgreSQL does not use them, it
# would be nice to support shared libgcc for the benefit of extensions.
#
# If SHLIB_EXPORTS is set, the rules below will build a .def file from that.
# Else we just use --export-all-symbols.
ifeq (,$(SHLIB_EXPORTS))
$(shlib): $(OBJS) | $(SHLIB_PREREQS)
$(CC) $(CFLAGS) -shared -static-libgcc -o $@ $(OBJS) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) -Wl,--export-all-symbols -Wl,--out-implib=$(stlib)
else
DLL_DEFFILE = lib$(NAME)dll.def
$(shlib): $(OBJS) $(DLL_DEFFILE) | $(SHLIB_PREREQS)
$(CC) $(CFLAGS) -shared -static-libgcc -o $@ $(OBJS) $(DLL_DEFFILE) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK) $(LIBS) -Wl,--out-implib=$(stlib)
endif
endif # PORTNAME == cygwin
endif # PORTNAME == cygwin || PORTNAME == win32
%.pc: $(MAKEFILE_LIST)
echo 'Name: lib$(NAME)' >$@
echo 'Description: PostgreSQL lib$(NAME) library' >>$@
echo 'Url: http://www.postgresql.org/' >>$@
echo 'Version: $(VERSION)' >>$@
echo 'Requires: ' >>$@
echo 'Requires.private: $(PKG_CONFIG_REQUIRES_PRIVATE)' >>$@
echo 'Cflags: -I$(includedir)' >>$@
echo 'Libs: -L$(libdir) -l$(NAME)' >>$@
# Record -L flags that the user might have passed in to the PostgreSQL
# build to locate third-party libraries (e.g., ldap, ssl). Filter out
# those that point inside the build or source tree. Use sort to
# remove duplicates. Also record the -l flags necessary for static
# linking, but not those already covered by Requires.private.
echo 'Libs.private: $(sort $(filter-out -L.% -L$(top_srcdir)/%,$(filter -L%,$(LDFLAGS) $(SHLIB_LINK)))) $(filter-out $(PKG_CONFIG_REQUIRES_PRIVATE:lib%=-l%),$(filter -l%,$(SHLIB_LINK_INTERNAL:%_shlib=%) $(SHLIB_LINK)))' >>$@
# We need several not-quite-identical variants of .DEF files to build
# DLLs for Windows. These are made from the single source file
# exports.txt. Since we can't assume that Windows boxes will have
# sed, the .DEF files are always built and included in distribution
# tarballs.
ifneq (,$(SHLIB_EXPORTS))
distprep: lib$(NAME)dll.def lib$(NAME)ddll.def
UC_NAME = $(shell echo $(NAME) | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ')
lib$(NAME)dll.def: $(SHLIB_EXPORTS)
echo '; DEF file for Makefile.shlib (MinGW)' >$@
echo 'LIBRARY LIB$(UC_NAME).dll' >>$@
echo 'EXPORTS' >>$@
sed -e '/^#/d' -e 's/^\(.*[ ]\)\([0-9][0-9]*\)/ \1@ \2/' $< >>$@
lib$(NAME)ddll.def: $(SHLIB_EXPORTS)
echo '; DEF file for Makefile.shlib (MinGW)' >$@
echo 'LIBRARY LIB$(UC_NAME)D.dll' >>$@
echo 'EXPORTS' >>$@
sed -e '/^#/d' -e 's/^\(.*[ ]\)\([0-9][0-9]*\)/ \1@ \2/' $< >>$@
endif # SHLIB_EXPORTS
##
## INSTALL
##
.PHONY: install-lib install-lib-static install-lib-shared installdirs-lib
install-lib: install-lib-shared
ifdef soname
install-lib: install-lib-static
install-lib: install-lib-pc
endif
install-lib-pc: lib$(NAME).pc installdirs-lib
$(INSTALL_DATA) $< '$(DESTDIR)$(pkgconfigdir)/lib$(NAME).pc'
install-lib-static: $(stlib) installdirs-lib
$(INSTALL_STLIB) $< '$(DESTDIR)$(libdir)/$(stlib)'
ifeq ($(PORTNAME), darwin)
cd '$(DESTDIR)$(libdir)' && \
$(RANLIB) $(stlib)
endif
install-lib-shared: $(shlib) installdirs-lib
ifdef soname
# we don't install $(shlib) on AIX
# (see http://archives.postgresql.org/message-id/52EF20B2E3209443BC37736D00C3C1380A6E79FE@EXADV1.host.magwien.gv.at)
ifneq ($(PORTNAME), aix)
$(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) $(shlib_bare)
endif
endif # not win32
endif # not cygwin
endif # not aix
ifneq (,$(findstring $(PORTNAME),win32 cygwin))
$(INSTALL_SHLIB) $< '$(DESTDIR)$(bindir)/$(shlib)'
endif
else # no soname
$(INSTALL_SHLIB) $< '$(DESTDIR)$(pkglibdir)/$(shlib)'
endif
installdirs-lib:
ifdef soname
$(MKDIR_P) '$(DESTDIR)$(libdir)' '$(DESTDIR)$(pkgconfigdir)' $(if $(findstring $(PORTNAME),win32 cygwin),'$(DESTDIR)$(bindir)')
else
$(MKDIR_P) '$(DESTDIR)$(pkglibdir)'
endif
##
## UNINSTALL
##
.PHONY: uninstall-lib
uninstall-lib:
ifdef soname
rm -f '$(DESTDIR)$(libdir)/$(stlib)'
rm -f '$(DESTDIR)$(libdir)/$(shlib_bare)' \
'$(DESTDIR)$(libdir)/$(shlib_major)' \
'$(DESTDIR)$(libdir)/$(shlib)' $(if $(findstring $(PORTNAME),win32 cygwin),'$(DESTDIR)$(bindir)/$(shlib)') \
'$(DESTDIR)$(pkgconfigdir)/lib$(NAME).pc'
else # no soname
rm -f '$(DESTDIR)$(pkglibdir)/$(shlib)'
endif # no soname
##
## CLEAN
##
.PHONY: clean-lib
clean-lib:
rm -f $(shlib) $(shlib_bare) $(shlib_major) $(stlib) $(exports_file) lib$(NAME).pc
ifneq (,$(SHLIB_EXPORTS))
maintainer-clean-lib:
rm -f lib$(NAME)dll.def lib$(NAME)ddll.def
endif
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