]> git.ipfire.org Git - thirdparty/openssl.git/commitdiff
Move the shared library construction stuff to Makefile.shared, a
authorRichard Levitte <levitte@openssl.org>
Fri, 11 Oct 2002 00:37:11 +0000 (00:37 +0000)
committerRichard Levitte <levitte@openssl.org>
Fri, 11 Oct 2002 00:37:11 +0000 (00:37 +0000)
helper makefile that generalises our way of building shared libraries
and is designed to take care of almost anything (I hope).

CHANGES
Makefile.org
Makefile.shared [new file with mode: 0644]

diff --git a/CHANGES b/CHANGES
index 78c3dc9081e67320b6ac5f3e2fc95d225cdeb88b..1c40b76a3d0c567f80b5fd276d07c544cbb09671 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -4,6 +4,10 @@
 
  Changes between 0.9.7 and 0.9.8  [xx XXX 2002]
 
+  *) Add Makefile.shared, a helper makefile to build shared
+     libraries.  Addapt Makefile.org.
+     [Richard Levitte]
+
   *) Add version info to Win32 DLLs.
      [Peter 'Luna' Runestig" <peter@runestig.com>]
 
index ecc771c58f29d336832c1a3f439d8053c73a2b13..c903567e02bb25c92e2ecdf77f77fd4bbd3e5a5a 100644 (file)
@@ -156,11 +156,7 @@ RMD160_ASM_OBJ= asm/rm86-out.o
 KRB5_INCLUDES=
 LIBKRB5=
 
-# When we're prepared to use shared libraries in the programs we link here
-# we might set SHLIB_MARK to '$(SHARED_LIBS)'.
-SHLIB_MARK=
-
-DIRS=   crypto ssl $(SHLIB_MARK) apps test tools
+DIRS=   crypto ssl apps test tools
 SHLIBDIRS= crypto ssl
 
 # dirs in crypto to build
@@ -176,7 +172,8 @@ SDIRS=  \
 TESTS = alltests
 
 MAKEFILE= Makefile.ssl
-MAKE=     make -f Makefile.ssl
+NEWMAKE=  make
+MAKE=     $(NEWMAKE) -f Makefile.ssl
 
 MANDIR=$(OPENSSLDIR)/man
 MAN1=1
@@ -202,9 +199,6 @@ WTARFILE=       $(NAME)-win.tar
 EXHEADER=       e_os2.h
 HEADER=         e_os.h
 
-# When we're prepared to use shared libraries in the programs we link here
-# we might remove 'clean-shared' from the targets to perform at this stage
-
 all: Makefile.ssl build_all
 
 BUILD_CMD=if echo " $(DIRS) " | grep " $$i " >/dev/null 2>/dev/null; then \
@@ -260,271 +254,26 @@ clean-shared:
        done
 
 link-shared:
-       @if [ -n "$(SHARED_LIBS_LINK_EXTS)" ]; then \
-               tmp="$(SHARED_LIBS_LINK_EXTS)"; \
-               for i in $(SHLIBDIRS); do \
-                       prev=lib$$i$(SHLIB_EXT); \
-                       for j in $${tmp:-x}; do \
-                               ( set -x; \
-                               rm -f lib$$i$$j; ln -s $$prev lib$$i$$j ); \
-                               prev=lib$$i$$j; \
-                       done; \
-               done; \
-       fi
-
-build-shared: clean-shared do_$(SHLIB_TARGET) link-shared
-
-do_bsd-gcc-shared: do_gnu-shared
-do_linux-shared: do_gnu-shared
-do_gnu-shared:
-       libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-       ( set -x; ${CC} ${SHARED_LDFLAGS} \
-               -shared -o lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-               -Wl,-soname=lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-               -Wl,-Bsymbolic \
-               -Wl,--whole-archive lib$$i.a \
-               -Wl,--no-whole-archive $$libs ${EX_LIBS} -lc ) || exit 1; \
-       libs="$$libs -l$$i"; \
-       done
-
-DETECT_GNU_LD=${CC} -v 2>&1 | grep '^gcc' >/dev/null 2>&1 && \
-       my_ld=`gcc -print-prog-name=ld 2>&1` && \
-       [ -n "$$my_ld" ] && \
-       $$my_ld -v 2>&1 | grep 'GNU ld' >/dev/null 2>&1
-
-# For Darwin AKA Mac OS/X (dyld)
-do_darwin-shared: 
-       libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-       ( set -x ; ${CC} --verbose -dynamiclib -o lib$$i${SHLIB_EXT} \
-               lib$$i.a $$libs -all_load -current_version ${SHLIB_MAJOR}.${SHLIB_MINOR} \
-               -compatibility_version ${SHLIB_MAJOR}.`echo ${SHLIB_MINOR} | cut -d. -f1` \
-               -install_name ${INSTALLTOP}/lib/lib$$i${SHLIB_EXT} ) || exit 1; \
-       libs="$$libs -l`basename $$i${SHLIB_EXT} .dylib`"; \
-       echo "" ; \
-       done
-
-do_cygwin-shared:
-       libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-       ( set -x; ${CC}  -shared -o cyg$$i.dll \
-               -Wl,-Bsymbolic \
-               -Wl,--whole-archive lib$$i.a \
-               -Wl,--out-implib,lib$$i.dll.a \
-               -Wl,--no-whole-archive $$libs ) || exit 1; \
-       libs="$$libs -l$$i"; \
-       done
-
-# This assumes that GNU utilities are *not* used
-do_alpha-osf1-shared:
-       if ${DETECT_GNU_LD}; then \
-               $(MAKE) do_gnu-shared; \
-       else \
-               libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-               ( set -x; ${CC} ${SHARED_LDFLAGS} \
-                       -shared -o lib$$i.so \
-                       -set_version "${SHLIB_VERSION_HISTORY}${SHLIB_VERSION_NUMBER}" \
-                       -all lib$$i.a -none $$libs ${EX_LIBS} -lc ) || exit 1; \
+       @ for i in ${SHLIBDIRS}; do \
+               $(NEWMAKE) -f Makefile.shared \
+                       LIBNAME=$$i LIBVERSION=${SHLIB_MAJOR}.${SHLIB_MINOR} \
+                       LIBCOMPATVERSIONS=";${SHLIB_VERSION_HISTORY}" \
+                       symlink.$(SHLIB_TARGET); \
                libs="$$libs -l$$i"; \
-               done; \
-       fi
-
-# This assumes that GNU utilities are *not* used
-# The difference between alpha-osf1-shared and tru64-shared is the `-msym'
-# option passed to the linker.
-do_tru64-shared:
-       if ${DETECT_GNU_LD}; then \
-               $(MAKE) do_gnu-shared; \
-       else \
-               libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-               ( set -x; ${CC} ${SHARED_LDFLAGS} \
-                       -shared -msym -o lib$$i.so \
-                       -set_version "${SHLIB_VERSION_HISTORY}${SHLIB_VERSION_NUMBER}" \
-                       -all lib$$i.a -none $$libs ${EX_LIBS} -lc ) || exit 1; \
-               libs="$$libs -l$$i"; \
-               done; \
-       fi
-
-# This assumes that GNU utilities are *not* used
-# The difference between tru64-shared and tru64-shared-rpath is the
-# -rpath ${INSTALLTOP}/lib passed to the linker.
-do_tru64-shared-rpath:
-       if ${DETECT_GNU_LD}; then \
-               $(MAKE) do_gnu-shared; \
-       else \
-               libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-               ( set -x; ${CC} ${SHARED_LDFLAGS} \
-                       -shared -msym -o lib$$i.so \
-                       -rpath  ${INSTALLTOP}/lib \
-                       -set_version "${SHLIB_VERSION_HISTORY}${SHLIB_VERSION_NUMBER}" \
-                       -all lib$$i.a -none $$libs ${EX_LIBS} -lc ) || exit 1; \
-               libs="$$libs -l$$i"; \
-               done; \
-       fi
-
-
-# This assumes that GNU utilities are *not* used
-do_solaris-shared:
-       if ${DETECT_GNU_LD}; then \
-               $(MAKE) do_gnu-shared; \
-       else \
-               libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-               ( PATH=/usr/ccs/bin:$$PATH ; export PATH; \
-                 set -x; ${CC} ${SHARED_LDFLAGS} \
-                       -G -o lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       -h lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       -z allextract lib$$i.a $$libs ${EX_LIBS} -lc ) || exit 1; \
-               libs="$$libs -l$$i"; \
-               done; \
-       fi
-
-# OpenServer 5 native compilers used
-do_svr3-shared:
-       if ${DETECT_GNU_LD}; then \
-               $(MAKE) do_gnu-shared; \
-       else \
-               libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-               ( PATH=/usr/ccs/bin:$$PATH ; export PATH; \
-                 find . -name "*.o" -print > allobjs ; \
-                 OBJS= ; export OBJS ; \
-                 for obj in `ar t lib$$i.a` ; do \
-                   OBJS="$${OBJS} `grep $$obj allobjs`" ; \
-                 done ; \
-                 set -x; ${CC}  -G -o lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       -h lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       $${OBJS} $$libs ${EX_LIBS} ) || exit 1; \
-               libs="$$libs -l$$i"; \
-               done; \
-       fi
-
-# UnixWare 7 and OpenUNIX 8 native compilers used
-do_svr5-shared:
-       if ${DETECT_GNU_LD}; then \
-               $(MAKE) do_gnu-shared; \
-       else \
-               libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-               ( PATH=/usr/ccs/bin:$$PATH ; export PATH; \
-                 find . -name "*.o" -print > allobjs ; \
-                 OBJS= ; export OBJS ; \
-                 for obj in `ar t lib$$i.a` ; do \
-                   OBJS="$${OBJS} `grep $$obj allobjs`" ; \
-                 done ; \
-                 set -x; ${CC} ${SHARED_LDFLAGS} \
-                       -G -o lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       -h lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       $${OBJS} $$libs ${EX_LIBS} ) || exit 1; \
-               libs="$$libs -l$$i"; \
-               done; \
-       fi
-
-# This assumes that GNU utilities are *not* used
-do_irix-shared:
-       if ${DETECT_GNU_LD}; then \
-               $(MAKE) do_gnu-shared; \
-       else \
-               libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-               ( set -x; ${CC} ${SHARED_LDFLAGS} \
-                       -shared -o lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       -Wl,-soname,lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-                       -all lib$$i.a $$libs ${EX_LIBS} -lc) || exit 1; \
-               libs="$$libs -l$$i"; \
-               done; \
-       fi
-
-# This assumes that GNU utilities are *not* used
-# HP-UX includes the full pathname of libs we depend on, so we would get
-# ./libcrypto (with ./ as path information) compiled into libssl, hence
-# we omit the SHLIBDEPS. Applications must be linked with -lssl -lcrypto
-# anyway.
-# The object modules are loaded from lib$i.a using the undocumented -Fl
-# option.
-#
-# WARNING: Until DSO is fixed to support a search path, we support SHLIB_PATH
-#          by temporarily specifying "+s"!
-#
-do_hpux-shared:
-       for i in ${SHLIBDIRS}; do \
-       ( set -x; /usr/ccs/bin/ld ${SHARED_LDFLAGS} \
-               +vnocompatwarnings \
-               -b -z +s \
-               -o lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-               +h lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-               -Fl lib$$i.a -ldld -lc ) || exit 1; \
-       chmod a=rx lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR}; \
        done
 
-# This assumes that GNU utilities are *not* used
-# HP-UX includes the full pathname of libs we depend on, so we would get
-# ./libcrypto (with ./ as path information) compiled into libssl, hence
-# we omit the SHLIBDEPS. Applications must be linked with -lssl -lcrypto
-# anyway.
-#
-# HP-UX in 64bit mode has "+s" enabled by default; it will search for
-# shared libraries along LD_LIBRARY_PATH _and_ SHLIB_PATH.
-#
-do_hpux64-shared:
-       for i in ${SHLIBDIRS}; do \
-       ( set -x; /usr/ccs/bin/ld ${SHARED_LDFLAGS} \
-               -b -z \
-               -o lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-               +h lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR} \
-               +forceload lib$$i.a -ldl -lc ) || exit 1; \
-       chmod a=rx lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR}; \
-       done
-
-# The following method is said to work on all platforms.  Tests will
-# determine if that's how it's gong to be used.
-# This assumes that for all but GNU systems, GNU utilities are *not* used.
-# ALLSYMSFLAGS would be:
-#  GNU systems: --whole-archive
-#  Tru64 Unix:  -all
-#  Solaris:     -z allextract
-#  Irix:        -all
-#  HP/UX-32bit: -Fl
-#  HP/UX-64bit: +forceload
-#  AIX:                -bnogc
-# SHAREDFLAGS would be:
-#  GNU systems: -shared -Wl,-soname=lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR}
-#  Tru64 Unix:  -shared \
-#              -set_version "${SHLIB_VERSION_HISTORY}${SHLIB_VERSION_NUMBER}"
-#  Solaris:     -G -h lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR}
-#  Irix:        -shared -Wl,-soname,lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR}
-#  HP/UX-32bit: +vnocompatwarnings -b -z +s \
-#              +h lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR}
-#  HP/UX-64bit: -b -z +h lib$$i.sl.${SHLIB_MAJOR}.${SHLIB_MINOR}
-#  AIX:                -G -bE:lib$$i.exp -bM:SRE
-# SHAREDCMD would be:
-#  GNU systems: $(CC)
-#  Tru64 Unix:  $(CC)
-#  Solaris:     $(CC)
-#  Irix:        $(CC)
-#  HP/UX-32bit: /usr/ccs/bin/ld
-#  HP/UX-64bit: /usr/ccs/bin/ld
-#  AIX:                $(CC)
-ALLSYMSFLAG=-bnogc
-SHAREDFLAGS=${SHARED_LDFLAGS} -G -bE:lib$$i.exp -bM:SRE
-SHAREDCMD=$(CC)
-do_aix-shared:
-       libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-       ( set -x; \
-         ld -r -o $$i.o $(ALLSYMSFLAG) lib$$i.a && \
-         ( nm -Pg lib$$i.o | grep ' [BD] ' | cut -f1 -d' ' > lib$$i.exp; \
-           $(SHAREDCMD) $(SHAREDFLAG) -o lib$$i.so lib$$i.o \
-               $$libs ${EX_LIBS} ) ) \
-       || exit 1; \
-       libs="$$libs -l$$i"; \
-       done
-
-do_reliantunix-shared:
-       libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
-       tmpdir=/tmp/openssl.$$$$ ; rm -rf $$tmpdir ; \
-       ( set -x; \
-         ( Opwd=`pwd` ; mkdir $$tmpdir || exit 1; \
-           cd $$tmpdir || exit 1 ; ar x $$Opwd/lib$$i.a ; \
-           ${CC} -G -o lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} *.o \
-         ) || exit 1; \
-         cp $$tmpdir/lib$$i.so.${SHLIB_MAJOR}.${SHLIB_MINOR} . ; \
-       ) || exit 1; \
-       rm -rf $$tmpdir ; \
-       libs="$$libs -l$$i"; \
+build-shared: do_$(SHLIB_TARGET) link-shared
+
+do_$(SHLIB_TARGET):
+       @ libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
+               $(NEWMAKE) -f Makefile.shared \
+                       CC="$(CC)" LDFLAGS="$(LDFLAGS)" \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME=$$i LIBVERSION=${SHLIB_MAJOR}.${SHLIB_MINOR} \
+                       LIBCOMPATVERSIONS=";${SHLIB_VERSION_HISTORY}" \
+                       LIBDEPS="$$libs $(EX_LIBS)" \
+                       link_a.$(SHLIB_TARGET); \
+               libs="$$libs -l$$i"; \
        done
 
 Makefile.ssl: Makefile.org
@@ -533,7 +282,7 @@ Makefile.ssl: Makefile.org
        @false
 
 libclean:
-       rm -f *.a */lib */*/lib
+       rm -f *.so *.so.* *.a */lib */*/lib
 
 clean:
        rm -f shlib/*.o *.o core a.out fluff *.map rehash.time testlog make.log cctest cctest.c
@@ -748,8 +497,7 @@ install: all install_docs
                done; \
                (       here="`pwd`"; \
                        cd $(INSTALL_PREFIX)$(INSTALLTOP)/lib; \
-                       set $(MAKE); \
-                       $$1 -f $$here/Makefile link-shared ); \
+                       $(NEWMAKE) -f $$here/Makefile link-shared ); \
        fi
 
 install_docs:
diff --git a/Makefile.shared b/Makefile.shared
new file mode 100644 (file)
index 0000000..033c8b7
--- /dev/null
@@ -0,0 +1,577 @@
+#
+# Helper makefile to link shared libraries in a portable way.
+# This is much simpler than libtool, and hopefully not too error-prone.
+#
+# The following variables need to be set on the command line to build
+# properly
+
+# CC contains the current compiler.  This one MUST be defined
+CC=cc
+# LDFLAGS contains flags to be used when the temporary object file is
+# created.  SHARED_LDFLAGS contains flags to be used when the shared
+# library is created.
+LDFLAGS=
+SHARED_LDFLAGS=
+
+# LIBNAME contains just the name of thhe library, without prefix ("lib"
+# on Unix, "cyg" for certain forms under Cygwin...) or suffix (.a, .so,
+# .dll, ...).  This one MUST have a value when using this makefile.
+# For example, to build libfoo.so, you need to do the following:
+#LIBNAME=foo
+LIBNAME=
+
+# LIBEXTRAS contains extra modules to link together with the library.
+# For example, if a seond library, say libbar.a needs to be linked into
+# libfoo.so, you need to do the following:
+#LIBEXTRAS=libbar.a
+# Note that this MUST be used when using the link_o targets, to hold the
+# names of all object files that go into the target library.
+LIBEXTRAS=
+
+# LIBVERSION contains the current version of the library.
+# For example, to build libfoo.so.1.2, you need to do the following:
+#LIBVERSION=1.2
+LIBVERSION=
+
+# LIBCOMPATVERSIONS contains the compatibility versions (a list) of
+# the library.  They MUST be in decreasing order.
+# For example, if libfoo.so.1.2.1 is backward compatible with libfoo.so.1.2
+# and libfoo.so.1, you need to do the following:
+#LIBCOMPATVERSIONS=1.2 1
+# Note that on systems that use sonames, the last number will appear as
+# part of it.
+# It's also possible, for systems that support it (Tru64, for example),
+# to add extra compatibility info with more precision, by adding a second
+# list of versions, separated from the first with a semicolon, like this:
+#LIBCOMPATVERSIONS=1.2 1;1.2.0 1.1.2 1.1.1 1.1.0 1.0.0
+LIBCOMPATVERSIONS=
+
+# LIBDEPS contains all the flags necessary to cover all necessary
+# dependencies to other libraries.
+LIBDEPS=
+
+#------------------------------------------------------------------------------
+# The rest is private to this makefile.
+
+#DEBUG=:
+DEBUG=set -x
+
+top:
+       echo "Trying to use this makefile interactively?  Don't."
+
+CALC_VERSIONS= \
+       SHLIB_COMPAT=; SHLIB_SOVER=; \
+       if [ -n "$(LIBVERSION) $(LIBCOMPATVERSIONS)" ]; then \
+               prev=""; \
+               for v in `echo "$(LIBVERSION) $(LIBCOMPATVERSIONS)" | cut -d';' -f1`; do \
+                       SHLIB_SOVER=.$$v; \
+                       if [ -n "$$prev" ]; then \
+                               SHLIB_COMPAT=$$SHLIB_COMPAT .$$prev; \
+                       fi; \
+                       prev=$$v; \
+               done; \
+       fi
+
+LINK_SO=       \
+  ( $(DEBUG); \
+    nm -Pg $$SHOBJECTS | grep ' [BDT] ' | cut -f1 -d' ' > lib$(LIBNAME).exp; \
+    $$SHAREDCMD $(SHARED_LDFLAGS) $$SHAREDFLAGS -o $$SHLIB$$SHLIB_SOVER \
+       $$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS ) && \
+  $(SYMLINK_SO); ( $(DEBUG); rm -f lib$(LIBNAME).exp )
+SYMLINK_SO=    \
+       if [ -n "$$SHLIB_COMPAT"]; then \
+               prev=$$SHLIB$$SHLIB_SOVER; \
+               for x in $$SHLIB_COMPAT; do \
+                       ( $(DEBUG); rm -f $$SHLIB$$x; \
+                         ln -s $$prev $$SHLIB$$x ); \
+                       prev=$$SHLIB$$x; \
+               done; \
+       fi
+LINK_SO_A=     SHOBJECTS="lib$(LIBNAME).a $(LIBEXTRAS)"; $(LINK_SO)
+LINK_SO_O=     SHOBJECTS="$(LIBEXTRAS)"; $(LINK_SO)
+LINK_SO_A_VIA_O=       \
+  SHOBJECTS=lib$(LIBNAME).o ALL=$$ALLSYMSFLAGS ALLSYMSFLAGS= NOALLSYMSFLAGS=; \
+  ( $(DEBUG); \
+    ld $(LDFLAGS) -r -o lib$(LIBNAME).o $$ALL lib$(LIBNAME).a $(LIBEXTRAS) ); \
+  $(LINK_SO) && rm -f $(LIBNAME).o
+LINK_SO_A_UNPACKED=    \
+  UNPACKDIR=link_tmp.$$$$; rm -rf $$UNPACKDIR; mkdir $$UNPACKDIR; \
+  (cd $$UNPACKDIR; ar x ../lib$(LIBNAME).a) && cp $(LIBEXTRAS) $$UNPACKDIR && \
+  SHOBJECTS=$$UNPACKDIR/*.o; \
+  $(LINK_SO) && rm -rf $$UNPACKDIR
+
+DETECT_GNU_LD=${CC} -v 2>&1 | grep '^gcc' >/dev/null 2>&1 && \
+       my_ld=`gcc -print-prog-name=ld 2>&1` && \
+       [ -n "$$my_ld" ] && \
+       $$my_ld -v 2>&1 | grep 'GNU ld' >/dev/null 2>&1
+
+link_o.gnu:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).so \
+       LIBDEPS="$(LIBDEPS)" \
+       NOALLSYMSFLAGS='-Wl,--no-whole-archive' \
+       SHAREDFLAGS="-shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER" \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_O)
+link_a.gnu:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).so \
+       LIBDEPS="$(LIBDEPS)" \
+       ALLSYMSFLAGS='-Wl,--whole-archive' \
+       NOALLSYMSFLAGS='-Wl,--no-whole-archive' \
+       SHAREDFLAGS="-shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER" \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_A)
+
+# For Darwin AKA Mac OS/X (dyld)
+link_o.darwin:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).dylib \
+       LIBDEPS="$(LIBDEPS)" \
+       ALLSYMSFLAGS='-all_load' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS="-current_version $(LIBVERSION) -compatibility_version $$SHLIB_SOVER" \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_O)
+link_a.darwin:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME)$$SHLIB_SOVER.dylib \
+       LIBDEPS="$(LIBDEPS)" \
+       ALLSYMSFLAGS='-all_load' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS="-dynamiclib -current_version $(LIBVERSION) -compatibility_version $$SHLIB_SOVER" \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_A)
+
+link_o.cygwin:
+       @ SHLIB=cyg$(LIBNAME).dll \
+       LIBDEPS="$(LIBDEPS)" \
+       SHLIB_SOVER= \
+       ALLSYMSFLAGS='-Wl,--whole-archive' \
+       NOALLSYMSFLAGS='-Wl,--no-whole-archive' \
+       SHAREDFLAGS="-shared -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a" \
+       SHAREDCMD='${CC}'; \
+       $(LINK_SO_O)
+link_a.cygwin:
+       @ SHLIB=cyg$(LIBNAME).dll \
+       LIBDEPS="$(LIBDEPS)" \
+       SHLIB_SOVER= \
+       ALLSYMSFLAGS='-Wl,--whole-archive' \
+       NOALLSYMSFLAGS='-Wl,--no-whole-archive' \
+       SHAREDFLAGS="-shared -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a" \
+       SHAREDCMD='${CC}'; \
+       $(LINK_SO_A)
+
+link_o.alpha-osf1:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
+               if [ -n "$$SHLIB_HIST" ]; then \
+                       SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
+               else \
+                       SHLIB_HIST="$(LIBVERSION)"; \
+               fi
+               SHLIB_SOVER= \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='-none' \
+               SHAREDFLAGS="-shared -set_version \"$$SHLIB_HIST\"" \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_O); \
+       fi
+link_a.alpha-osf1:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
+               if [ -n "$$SHLIB_HIST" ]; then \
+                       SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
+               else \
+                       SHLIB_HIST="$(LIBVERSION)"; \
+               fi
+               SHLIB_SOVER= \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='-none' \
+               SHAREDFLAGS="-shared -set_version \"$$SHLIB_HIST\"" \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_A); \
+       fi
+
+# The difference between alpha-osf1-shared and tru64-shared is the `-msym'
+# option passed to the linker.
+link_o.tru64:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
+               if [ -n "$$SHLIB_HIST" ]; then \
+                       SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
+               else \
+                       SHLIB_HIST="$(LIBVERSION)"; \
+               fi
+               SHLIB_SOVER= \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='-none' \
+               SHAREDFLAGS="-shared -msym -set_version \"$$SHLIB_HIST\"" \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_O); \
+       fi
+link_a.tru64:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
+               if [ -n "$$SHLIB_HIST" ]; then \
+                       SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
+               else \
+                       SHLIB_HIST="$(LIBVERSION)"; \
+               fi
+               SHLIB_SOVER= \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='-none' \
+               SHAREDFLAGS="-shared -msym -set_version \"$$SHLIB_HIST\"" \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_A); \
+       fi
+
+# The difference between tru64-shared and tru64-shared-rpath is the
+# -rpath ${LIBRPATH} passed to the linker.
+link_o.tru64-rpath:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
+               if [ -n "$$SHLIB_HIST" ]; then \
+                       SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
+               else \
+                       SHLIB_HIST="$(LIBVERSION)"; \
+               fi
+               SHLIB_SOVER= \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='-none' \
+               SHAREDFLAGS="-shared -msym -rpath $(LIBRPATH) -set_version \"$$SHLIB_HIST\"" \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_O); \
+       fi
+link_a.tru64-rpath:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
+               if [ -n "$$SHLIB_HIST" ]; then \
+                       SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
+               else \
+                       SHLIB_HIST="$(LIBVERSION)"; \
+               fi
+               SHLIB_SOVER= \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='-none' \
+               SHAREDFLAGS="-shared -msym -rpath $(LIBRPATH) -set_version \"$$SHLIB_HIST\"" \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_A); \
+       fi
+
+link_o.solaris:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               $(CALC_VERSIONS); \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               ALLSYMSFLAGS='-z allextract' \
+               NOALLSYMSFLAGS='' \
+               SHAREDFLAGS='-G -h $$SHLIB$$SHLIB_SOVER' \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_O); \
+       fi
+link_a.solaris:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               $(CALC_VERSIONS); \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               ALLSYMSFLAGS='-z allextract' \
+               NOALLSYMSFLAGS='' \
+               SHAREDFLAGS='-G -h $$SHLIB$$SHLIB_SOVER' \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_A); \
+       fi
+
+# OpenServer 5 native compilers used
+# UnixWare 7 and OpenUNIX 8 native compilers used
+link_o.svr3:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               $(CALC_VERSIONS); \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               ALLSYMSFLAGS='-z allextract' \
+               NOALLSYMSFLAGS='' \
+               SHAREDFLAGS='-G -h $$SHLIB$$SHLIB_SOVER' \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_O); \
+       fi
+link_a.svr3:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               $(CALC_VERSIONS); \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               ALLSYMSFLAGS='-z allextract' \
+               NOALLSYMSFLAGS='' \
+               SHAREDFLAGS='-G -h $$SHLIB$$SHLIB_SOVER' \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_A_UNPACKED); \
+       fi
+
+link_o.irix:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               $(CALC_VERSIONS); \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='' \
+               SHAREDFLAGS='-shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER' \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_O); \
+       fi
+link_a.irix:
+       @ if ${DETECT_GNU_LD}; then \
+               $(MAKE) -f $(SHARED_MAKEFILE) CC="$(CC)" LDFLAGS="$(LDFLAGS) \
+                       SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
+                       LIBNAME="$(LIBNAME)" LIBEXTRAS="$(LIBEXTRAS)" \
+                       LIBVERSION="$(LIBVERSION)"
+                       LIBCOMPATVERSIONS="$(LIBCOMPATVERSIONS)" \
+                       LIBDEPS="$(LIBDEPS)" link_o.gnu; \
+       else \
+               $(CALC_VERSIONS); \
+               SHLIB=lib$(LIBNAME).so \
+               LIBDEPS="$(LIBDEPS)" \
+               ALLSYMSFLAGS='-all' \
+               NOALLSYMSFLAGS='' \
+               SHAREDFLAGS='-shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER' \
+               SHAREDCMD='$(CC)'; \
+               $(LINK_SO_A); \
+       fi
+
+# HP-UX includes the full pathname of libs we depend on, so we would get
+# ./libcrypto (with ./ as path information) compiled into libssl, hence
+# we omit the SHLIBDEPS. Applications must be linked with -lssl -lcrypto
+# anyway.
+# The object modules are loaded from lib$i.a using the undocumented -Fl
+# option.
+#
+# WARNING: Until DSO is fixed to support a search path, we support SHLIB_PATH
+#          by temporarily specifying "+s"!
+#
+link_o.hpux32:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).sl \
+       LIBDEPS="$(LIBDEPS) -lc" \
+       ALLSYMSFLAGS='-Fl' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='+vnocompatwarnings -b -z +s +h $$SHLIB$$SHLIB_SOVER' \
+       SHAREDCMD='/usr/ccs/bin/ld'; \
+       $(LINK_SO_O) && chmod a=rx $$SHLIB$$SHLIB_SOVER
+link_a.hpux32:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).sl \
+       LIBDEPS="$(LIBDEPS) -lc" \
+       ALLSYMSFLAGS='-Fl' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='+vnocompatwarnings -b -z +s +h $$SHLIB$$SHLIB_SOVER' \
+       SHAREDCMD='/usr/ccs/bin/ld'; \
+       $(LINK_SO_A) && chmod a=rx $$SHLIB$$SHLIB_SOVER
+
+# HP-UX includes the full pathname of libs we depend on, so we would get
+# ./libcrypto (with ./ as path information) compiled into libssl, hence
+# we omit the SHLIBDEPS. Applications must be linked with -lssl -lcrypto
+# anyway.
+#
+# HP-UX in 64bit mode has "+s" enabled by default; it will search for
+# shared libraries along LD_LIBRARY_PATH _and_ SHLIB_PATH.
+#
+link_o.hpux64:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).sl \
+       LIBDEPS="$(LIBDEPS) -lc" \
+       ALLSYMSFLAGS='+forceload' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='-b -z +h $$SHLIB$$SHLIB_SOVER' \
+       SHAREDCMD='/usr/ccs/bin/ld'; \
+       $(LINK_SO_O) && chmod a=rx $$SHLIB$$SHLIB_SOVER
+link_a.hpux64:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).sl \
+       LIBDEPS="$(LIBDEPS) -lc" \
+       ALLSYMSFLAGS='+forceload' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='-b -z +h $$SHLIB$$SHLIB_SOVER' \
+       SHAREDCMD='/usr/ccs/bin/ld'; \
+       $(LINK_SO_A) && chmod a=rx $$SHLIB$$SHLIB_SOVER
+
+link_o.aix:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).so \
+       LIBDEPS="$(LIBDEPS)" \
+       ALLSYMSFLAGS='-bnogc' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='-G -bE:lib$(LIBNAME).exp -bM:SRE' \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_O)
+link_a.aix:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).so \
+       LIBDEPS="$(LIBDEPS)" \
+       ALLSYMSFLAGS='-bnogc' \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='-G -bE:lib$(LIBNAME).exp -bM:SRE' \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_A_VIA_O)
+
+link_o.reliantunix:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).so \
+       LIBDEPS="$(LIBDEPS)" \
+       ALLSYMSFLAGS= \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='-G' \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_O)
+link_a.reliantunix:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).so \
+       LIBDEPS="$(LIBDEPS)" \
+       ALLSYMSFLAGS= \
+       NOALLSYMSFLAGS='' \
+       SHAREDFLAGS='-G' \
+       SHAREDCMD='$(CC)'; \
+       $(LINK_SO_A_UNPACKED)
+
+# Targets to build symbolic links when needed
+symlink.gnu symlink.darwin symlink.solaris symlink.svr3 symlink.irix \
+symlink.aix symlink.reliantunix:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).so \
+       $(SYMLINK_SO)
+symlink.cygwin symlib.alpha-osf1 symlink.tru64 symlink.tru64-rpath:
+symlink.hpux32 symlink.hpux64:
+       @ $(CALC_VERSIONS); \
+       SHLIB=lib$(LIBNAME).sl \
+       $(SYMLINK_SO)
+
+# Compatibility targets
+link_o.bsd-gcc-shared link_o.linux-shared link_o.gnu-shared: link_o.gnu
+link_a.bsd-gcc-shared link_a.linux-shared link_a.gnu-shared: link_a.gnu
+symlink.bsd-gcc-shared symlink.linux-shared symlink.gnu-shared: symlink.gnu
+link_o.darwin-shared: link_o.darwin
+link_a.darwin-shared: link_a.darwin
+symlink.darwin-shared: symlink.darwin
+link_o.cygwin-shared: link_o.cygwin
+link_a.cygwin-shared: link_a.cygwin
+symlink.cygwin-shared: symlink.cygwin
+link_o.alpha-osf1-shared: link_o.alpha-osf1
+link_a.alpha-osf1-shared: link_a.alpha-osf1
+symlink.alpha-osf1-shared: symlink.alpha-osf1
+link_o.tru64-shared: link_o.tru64
+link_a.tru64-shared: link_a.tru64
+symlink.tru64-shared: symlink.tru64
+link_o.tru64-shared-rpath: link_o.tru64-rpath
+link_a.tru64-shared-rpath: link_a.tru64-rpath
+symlink.tru64-shared-rpath: symlink.tru64-rpath
+link_o.solaris-shared: link_o.solaris
+link_a.solaris-shared: link_a.solaris
+symlink.solaris-shared: symlink.solaris
+link_o.svr3-shared: link_o.svr3
+link_a.svr3-shared: link_a.svr3
+symlink.svr3-shared: symlink.svr3
+link_o.svr5-shared: link_o.svr3
+link_a.svr5-shared: link_a.svr3
+symlink.svr5-shared: symlink.svr3
+link_o.irix-shared: link_o.irix
+link_a.irix-shared: link_a.irix
+symlink.irix-shared: symlink.irix
+link_o.hpux-shared: link_o.hpux32
+link_a.hpux-shared: link_a.hpux32
+symlink.hpux-shared: symlink.hpux32
+link_o.hpux64-shared: link_o.hpux64
+link_a.hpux64-shared: link_a.hpux64
+symlink.hpux64-shared: symlink.hpux64
+link_o.aix-shared: link_o.aix
+link_a.aix-shared: link_a.aix
+symlink.aix-shared: symlink.aix
+link_o.reliantunix-shared: link_o.reliantunix
+link_a.reliantunix-shared: link_a.reliantunix
+symlink.reliantunix-shared: symlink.reliantunix