Makefile.shared: update link_o.dawrin rule.

# The rest is private to this makefile.

SET_X=:

#SET_X=set -x

SET_X=set -x

top:

	echo "Trying to use this makefile interactively?  Don't."

  ALL=$$ALLSYMSFLAGS; ALLSYMSFLAGS=; NOALLSYMSFLAGS=; \

  ( $(SET_X); \

    ld $(LDFLAGS) -r -o lib$(LIBNAME).o $$ALL lib$(LIBNAME).a $(LIBEXTRAS) ); \

  $(LINK_SO) && rm -f $(LIBNAME).o

  $(LINK_SO) && rm -f lib$(LIBNAME).o

LINK_SO_A_UNPACKED=	\

  UNPACKDIR=link_tmp.$$$$; rm -rf $$UNPACKDIR; mkdir $$UNPACKDIR; \

	fi; $(LINK_APP)

# For Darwin AKA Mac OS/X (dyld)

# link_o.darwin produces .so, because we let it use dso_dlfcn module,

# which has .so extension hard-coded. One can argue that one should

# develop special dso module for MacOS X. At least manual encourages

# to use native NSModule(3) API and refers to dlfcn as termporary hack.

# Originally link_o.darwin produced .so, because it was hard-coded

# in dso_dlfcn module. At later point dso_dlfcn switched to .dylib

# extension in order to allow for run-time linking with vendor-

# supplied shared libraries such as libz, so that link_o.darwin had

# to be harmonized with it. This caused minor controversy, because

# it was believed that dlopen can't be used to dynamically load

# .dylib-s, only so called bundle modules (ones linked with -bundle

# flag). The belief seems to be originating from pre-10.4 release,

# where dlfcn functionality was emulated by dlcompat add-on. In

# 10.4 dlopen was rewritten as native part of dyld and is documented

# to be capable of loading both dynamic libraries and bundles. In

# order to provide compatibility with pre-10.4 dlopen, modules are

# linked with -bundle flag, which makes .dylib extension misleading.

# It works, because dlopen is [and always was] extension-agnostic.

link_o.darwin:

	@ $(CALC_VERSIONS); \

	SHLIB=lib$(LIBNAME); \

	SHLIB_SUFFIX=.so; \

	SHLIB_SUFFIX=.dylib; \

	ALLSYMSFLAGS='-all_load'; \

	NOALLSYMSFLAGS=''; \

	SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \

	SHAREDFLAGS="$(CFLAGS) `echo $(SHARED_LDFLAGS) | sed s/dynamiclib/bundle/"; \

	if [ -n "$(LIBVERSION)" ]; then \

		SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \

	fi; \