Makefile.shared

   1 #
   2 # Helper makefile to link shared libraries in a portable way.
   3 # This is much simpler than libtool, and hopefully not too error-prone.
   4 #
   5 # The following variables need to be set on the command line to build
   6 # properly
   7
   8 # CC contains the current compiler.  This one MUST be defined
   9 CC=cc
  10 CFLAGS=$(CFLAG)
  11 # LDFLAGS contains flags to be used when temporary object files (when building
  12 # shared libraries) are created, or when an application is linked.
  13 # SHARED_LDFLAGS contains flags to be used when the shared library is created.
  14 LDFLAGS=
  15 SHARED_LDFLAGS=
  16
  17 # LIBNAME contains just the name of the library, without prefix ("lib"
  18 # on Unix, "cyg" for certain forms under Cygwin...) or suffix (.a, .so,
  19 # .dll, ...).  This one MUST have a value when using this makefile to
  20 # build shared libraries.
  21 # For example, to build libfoo.so, you need to do the following:
  22 #LIBNAME=foo
  23 LIBNAME=
  24
  25 # APPNAME contains just the name of the application, without suffix (""
  26 # on Unix, ".exe" on Windows, ...).  This one MUST have a value when using
  27 # this makefile to build applications.
  28 # For example, to build foo, you need to do the following:
  29 #APPNAME=foo
  30 APPNAME=
  31
  32 # OBJECTS contains all the object files to link together into the application.
  33 # This must contain at least one object file.
  34 #OBJECTS=foo.o
  35 OBJECTS=
  36
  37 # LIBEXTRAS contains extra modules to link together with the library.
  38 # For example, if a second library, say libbar.a needs to be linked into
  39 # libfoo.so, you need to do the following:
  40 #LIBEXTRAS=libbar.a
  41 # Note that this MUST be used when using the link_o targets, to hold the
  42 # names of all object files that go into the target library.
  43 LIBEXTRAS=
  44
  45 # LIBVERSION contains the current version of the library.
  46 # For example, to build libfoo.so.1.2, you need to do the following:
  47 #LIBVERSION=1.2
  48 LIBVERSION=
  49
  50 # LIBCOMPATVERSIONS contains the compatibility versions (a list) of
  51 # the library.  They MUST be in decreasing order.
  52 # For example, if libfoo.so.1.2.1 is backward compatible with libfoo.so.1.2
  53 # and libfoo.so.1, you need to do the following:
  54 #LIBCOMPATVERSIONS=1.2 1
  55 # Note that on systems that use sonames, the last number will appear as
  56 # part of it.
  57 # It's also possible, for systems that support it (Tru64, for example),
  58 # to add extra compatibility info with more precision, by adding a second
  59 # list of versions, separated from the first with a semicolon, like this:
  60 #LIBCOMPATVERSIONS=1.2 1;1.2.0 1.1.2 1.1.1 1.1.0 1.0.0
  61 LIBCOMPATVERSIONS=
  62
  63 # LIBDEPS contains all the flags necessary to cover all necessary
  64 # dependencies to other libraries.
  65 LIBDEPS=
  66
  67 #------------------------------------------------------------------------------
  68 # The rest is private to this makefile.
  69
  70 SET_X=:
  71 #SET_X=set -x
  72
  73 top:
  74         echo "Trying to use this makefile interactively?  Don't."
  75
  76 CALC_VERSIONS=  \
  77         SHLIB_COMPAT=; SHLIB_SOVER=; \
  78         if [ -n "$(LIBVERSION)$(LIBCOMPATVERSIONS)" ]; then \
  79                 prev=""; \
  80                 for v in `echo "$(LIBVERSION) $(LIBCOMPATVERSIONS)" | cut -d';' -f1`; do \
  81                         SHLIB_SOVER_NODOT=$$v; \
  82                         SHLIB_SOVER=.$$v; \
  83                         if [ -n "$$prev" ]; then \
  84                                 SHLIB_COMPAT="$$SHLIB_COMPAT .$$prev"; \
  85                         fi; \
  86                         prev=$$v; \
  87                 done; \
  88         fi
  89
  90 LINK_APP=       \
  91   ( $(SET_X);   \
  92     LIBDEPS="$${LIBDEPS:-$(LIBDEPS)}"; \
  93     LDCMD="$${LDCMD:-$(CC)}"; LDFLAGS="$${LDFLAGS:-$(CFLAGS)}"; \
  94     LIBPATH=`for x in $$LIBDEPS; do if echo $$x | grep '^ *-L' > /dev/null 2>&1; then echo $$x | sed -e 's/^ *-L//'; fi; done | uniq`; \
  95     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
  96     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
  97     $${LDCMD} $${LDFLAGS} -o $${APPNAME:=$(APPNAME)} $(OBJECTS) $${LIBDEPS} )
  98
  99 LINK_SO=        \
 100   ( $(SET_X);   \
 101     LIBDEPS="$${LIBDEPS:-$(LIBDEPS)}"; \
 102     SHAREDCMD="$${SHAREDCMD:-$(CC)}"; \
 103     SHAREDFLAGS="$${SHAREDFLAGS:-$(CFLAGS) $(SHARED_LDFLAGS)}"; \
 104     LIBPATH=`for x in $$LIBDEPS; do if echo $$x | grep '^ *-L' > /dev/null 2>&1; then echo $$x | sed -e 's/^ *-L//'; fi; done | uniq`; \
 105     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
 106     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 107     $${SHAREDCMD} $${SHAREDFLAGS} \
 108         -o $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX \
 109         $$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS \
 110   ) && $(SYMLINK_SO)
 111
 112 SYMLINK_SO=     \
 113         if [ -n "$$INHIBIT_SYMLINKS" ]; then :; else \
 114                 prev=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 115                 if [ -n "$$SHLIB_COMPAT" ]; then \
 116                         for x in $$SHLIB_COMPAT; do \
 117                                 ( $(SET_X); rm -f $$SHLIB$$x$$SHLIB_SUFFIX; \
 118                                   ln -s $$prev $$SHLIB$$x$$SHLIB_SUFFIX ); \
 119                                 prev=$$SHLIB$$x$$SHLIB_SUFFIX; \
 120                         done; \
 121                 fi; \
 122                 if [ -n "$$SHLIB_SOVER" ]; then \
 123                         ( $(SET_X); rm -f $$SHLIB$$SHLIB_SUFFIX; \
 124                           ln -s $$prev $$SHLIB$$SHLIB_SUFFIX ); \
 125                 fi; \
 126         fi
 127
 128 LINK_SO_A=      SHOBJECTS="lib$(LIBNAME).a $(LIBEXTRAS)"; $(LINK_SO)
 129 LINK_SO_O=      SHOBJECTS="$(LIBEXTRAS)"; $(LINK_SO)
 130
 131 LINK_SO_A_VIA_O=        \
 132   SHOBJECTS=lib$(LIBNAME).o; \
 133   ALL=$$ALLSYMSFLAGS; ALLSYMSFLAGS=; NOALLSYMSFLAGS=; \
 134   ( $(SET_X); \
 135     ld $(LDFLAGS) -r -o lib$(LIBNAME).o $$ALL lib$(LIBNAME).a $(LIBEXTRAS) ); \
 136   $(LINK_SO) && rm -f $(LIBNAME).o
 137
 138 LINK_SO_A_UNPACKED=     \
 139   UNPACKDIR=link_tmp.$$$$; rm -rf $$UNPACKDIR; mkdir $$UNPACKDIR; \
 140   (cd $$UNPACKDIR; ar x ../lib$(LIBNAME).a) && \
 141   ([ -z "$(LIBEXTRAS)" ] || cp $(LIBEXTRAS) $$UNPACKDIR) && \
 142   SHOBJECTS=$$UNPACKDIR/*.o; \
 143   $(LINK_SO) && rm -rf $$UNPACKDIR
 144
 145 DETECT_GNU_LD=(${CC} -Wl,-V /dev/null 2>&1 | grep '^GNU ld' )>/dev/null
 146
 147 DO_GNU_SO=$(CALC_VERSIONS); \
 148         SHLIB=lib$(LIBNAME).so; \
 149         SHLIB_SUFFIX=; \
 150         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 151         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 152         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"
 153
 154 DO_GNU_APP=LDFLAGS="$(CFLAGS) -Wl,-rpath,$(LIBRPATH)"
 155
 156 #This is rather special.  It's a special target with which one can link
 157 #applications without bothering with any features that have anything to
 158 #do with shared libraries, for example when linking against static
 159 #libraries.  It's mostly here to avoid a lot of conditionals everywhere
 160 #else...
 161 link_app.:
 162         $(LINK_APP)
 163
 164 link_o.gnu:
 165         @ $(DO_GNU_SO); $(LINK_SO_O)
 166 link_a.gnu:
 167         @ $(DO_GNU_SO); $(LINK_SO_A)
 168 link_app.gnu:
 169         @ $(DO_GNU_APP); $(LINK_APP)
 170
 171 link_o.bsd:
 172         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 173         $(CALC_VERSIONS); \
 174         SHLIB=lib$(LIBNAME).so; \
 175         SHLIB_SUFFIX=; \
 176         LIBDEPS=" "; \
 177         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 178         NOALLSYMSFLAGS=; \
 179         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 180         fi; $(LINK_SO_O)
 181 link_a.bsd:
 182         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 183         $(CALC_VERSIONS); \
 184         SHLIB=lib$(LIBNAME).so; \
 185         SHLIB_SUFFIX=; \
 186         LIBDEPS=" "; \
 187         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 188         NOALLSYMSFLAGS=; \
 189         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 190         fi; $(LINK_SO_A)
 191 link_app.bsd:
 192         @if ${DETECT_GNU_LD}; then $(DO_GNU_APP); else \
 193         LDFLAGS="$(CFLAGS) -Wl,-rpath,$(LIBPATH)"; \
 194         fi; $(LINK_APP)
 195
 196 # For Darwin AKA Mac OS/X (dyld)
 197 # link_o.darwin produces .so, because we let it use dso_dlfcn module,
 198 # which has .so extension hard-coded. One can argue that one should
 199 # develop special dso module for MacOS X. At least manual encourages
 200 # to use native NSModule(3) API and refers to dlfcn as termporary hack.
 201 link_o.darwin:
 202         @ $(CALC_VERSIONS); \
 203         SHLIB=`expr "$$THIS" : '.*/\([^/\.]*\)\.'`; \
 204         SHLIB=$${SHLIB:-lib$(LIBNAME)}; \
 205         SHLIB_SUFFIX=`expr "$$THIS" : '.*\(\.[^\.]*\)$$'`; \
 206         SHLIB_SUFFIX=$${SHLIB_SUFFIX:-.so}; \
 207         ALLSYMSFLAGS='-all_load'; \
 208         NOALLSYMSFLAGS=''; \
 209         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \
 210         if [ -n "$(LIBVERSION)" ]; then \
 211                 SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \
 212         fi; \
 213         if [ -n "$$SHLIB_SOVER_NODOT" ]; then \
 214                 SHAREDFLAGS="$$SHAREDFLAGS -compatibility_version $$SHLIB_SOVER_NODOT"; \
 215         fi; \
 216         $(LINK_SO_O)
 217 link_a.darwin:
 218         @ $(CALC_VERSIONS); \
 219         SHLIB=lib$(LIBNAME); \
 220         SHLIB_SUFFIX=.dylib; \
 221         ALLSYMSFLAGS='-all_load'; \
 222         NOALLSYMSFLAGS=''; \
 223         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \
 224         if [ -n "$(LIBVERSION)" ]; then \
 225                 SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \
 226         fi; \
 227         if [ -n "$$SHLIB_SOVER_NODOT" ]; then \
 228                 SHAREDFLAGS="$$SHAREDFLAGS -compatibility_version $$SHLIB_SOVER_NODOT"; \
 229         fi; \
 230         SHAREDFLAGS="$$SHAREDFLAGS -install_name ${INSTALLTOP}/lib/$$SHLIB${SHLIB_EXT}"; \
 231         $(LINK_SO_A)
 232 link_app.darwin:        # is there run-path on darwin?
 233         $(LINK_APP)
 234
 235 link_o.cygwin:
 236         @ $(CALC_VERSIONS); \
 237         INHIBIT_SYMLINKS=yes; \
 238         SHLIB=cyg$(LIBNAME); \
 239         base=-Wl,--enable-auto-image-base; \
 240         if expr $(PLATFORM) : 'mingw' > /dev/null; then \
 241                 SHLIB=$(LIBNAME)eay32; base=; \
 242         fi; \
 243         SHLIB_SUFFIX=.dll; \
 244         LIBVERSION="$(LIBVERSION)"; \
 245         SHLIB_SOVER=${LIBVERSION:+"-$(LIBVERSION)"}; \
 246         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 247         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 248         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a"; \
 249         $(LINK_SO_O)
 250 link_a.cygwin:
 251         @ $(CALC_VERSIONS); \
 252         INHIBIT_SYMLINKS=yes; \
 253         SHLIB=cyg$(LIBNAME); \
 254         base=-Wl,--enable-auto-image-base; \
 255         if expr $(PLATFORM) : 'mingw' > /dev/null; then \
 256                 SHLIB=$(LIBNAME)eay32; \
 257                 base=;  [ $(LIBNAME) = "crypto" ] && base=-Wl,--image-base,0x63000000; \
 258         fi; \
 259         SHLIB_SUFFIX=.dll; \
 260         SHLIB_SOVER=-$(LIBVERSION); \
 261         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 262         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 263         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a"; \
 264         [ -f apps/$$SHLIB$$SHLIB_SUFFIX ] && rm apps/$$SHLIB$$SHLIB_SUFFIX; \
 265         [ -f test/$$SHLIB$$SHLIB_SUFFIX ] && rm test/$$SHLIB$$SHLIB_SUFFIX; \
 266         $(LINK_SO_A) || exit 1; \
 267         cp -p $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX apps/; \
 268         cp -p $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX test/
 269 link_app.cygwin:
 270         $(LINK_APP)
 271
 272 link_o.alpha-osf1:
 273         @ if ${DETECT_GNU_LD}; then \
 274                 $(DO_GNU_SO); \
 275         else \
 276                 SHLIB=lib$(LIBNAME).so; \
 277                 SHLIB_SUFFIX=; \
 278                 SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
 279                 if [ -n "$$SHLIB_HIST" ]; then \
 280                         SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
 281                 else \
 282                         SHLIB_HIST="$(LIBVERSION)"; \
 283                 fi; \
 284                 SHLIB_SOVER=; \
 285                 ALLSYMSFLAGS='-all'; \
 286                 NOALLSYMSFLAGS='-none'; \
 287                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-B,symbolic"; \
 288                 if [ -n "$$SHLIB_HIST" ]; then \
 289                         SHAREDFLAGS="$$SHAREDFLAGS -set_version $$SHLIB_HIST"; \
 290                 fi; \
 291         fi; \
 292         $(LINK_SO_O)
 293 link_a.alpha-osf1:
 294         @ if ${DETECT_GNU_LD}; then \
 295                 $(DO_GNU_SO); \
 296         else \
 297                 SHLIB=lib$(LIBNAME).so; \
 298                 SHLIB_SUFFIX=; \
 299                 SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
 300                 if [ -n "$$SHLIB_HIST" ]; then \
 301                         SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
 302                 else \
 303                         SHLIB_HIST="$(LIBVERSION)"; \
 304                 fi; \
 305                 SHLIB_SOVER=; \
 306                 ALLSYMSFLAGS='-all'; \
 307                 NOALLSYMSFLAGS='-none'; \
 308                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-B,symbolic"; \
 309                 if [ -n "$$SHLIB_HIST" ]; then \
 310                         SHAREDFLAGS="$$SHAREDFLAGS -set_version $$SHLIB_HIST"; \
 311                 fi; \
 312         fi; \
 313         $(LINK_SO_A)
 314 link_app.alpha-osf1:
 315         @if ${DETECT_GNU_LD}; then \
 316                 $(DO_GNU_APP); \
 317         else \
 318                 LDFLAGS="$(CFLAGS) -rpath $(LIBRPATH)"; \
 319         fi; \
 320         $(LINK_APP)
 321
 322 link_o.solaris:
 323         @ if ${DETECT_GNU_LD}; then \
 324                 $(DO_GNU_SO); \
 325         else \
 326                 $(CALC_VERSIONS); \
 327                 MINUSZ='-z '; \
 328                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSZ='-Wl,-z,'; \
 329                 SHLIB=lib$(LIBNAME).so; \
 330                 SHLIB_SUFFIX=; \
 331                 ALLSYMSFLAGS="$${MINUSZ}allextract"; \
 332                 NOALLSYMSFLAGS="$${MINUSZ}defaultextract"; \
 333                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 334         fi; \
 335         $(LINK_SO_O)
 336 link_a.solaris:
 337         @ if ${DETECT_GNU_LD}; then \
 338                 $(DO_GNU_SO); \
 339         else \
 340                 $(CALC_VERSIONS); \
 341                 MINUSZ='-z '; \
 342                 (${CC} -v 2>&1 | grep gcc) > /dev/null && MINUSZ='-Wl,-z,'; \
 343                 SHLIB=lib$(LIBNAME).so; \
 344                 SHLIB_SUFFIX=;\
 345                 ALLSYMSFLAGS="$${MINUSZ}allextract"; \
 346                 NOALLSYMSFLAGS="$${MINUSZ}defaultextract"; \
 347                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 348         fi; \
 349         $(LINK_SO_A)
 350 link_app.solaris:
 351         @ if ${DETECT_GNU_LD}; then \
 352                 $(DO_GNU_APP); \
 353         else \
 354                 LDFLAGS="$(CFLAGS) -R $(LIBRPATH)"; \
 355         fi; \
 356         $(LINK_APP)
 357
 358 # OpenServer 5 native compilers used
 359 link_o.svr3:
 360         @ if ${DETECT_GNU_LD}; then \
 361                 $(DO_GNU_SO); \
 362         else \
 363                 $(CALC_VERSIONS); \
 364                 SHLIB=lib$(LIBNAME).so; \
 365                 SHLIB_SUFFIX=; \
 366                 ALLSYMSFLAGS=''; \
 367                 NOALLSYMSFLAGS=''; \
 368                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 369         fi; \
 370         $(LINK_SO_O)
 371 link_a.svr3:
 372         @ if ${DETECT_GNU_LD}; then \
 373                 $(DO_GNU_SO); \
 374         else \
 375                 $(CALC_VERSIONS); \
 376                 SHLIB=lib$(LIBNAME).so; \
 377                 SHLIB_SUFFIX=; \
 378                 ALLSYMSFLAGS=''; \
 379                 NOALLSYMSFLAGS=''; \
 380                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 381         fi; \
 382         $(LINK_SO_A_UNPACKED)
 383 link_app.svr3:
 384         @${DETECT_GNU_LD} && $(DO_GNU_APP); \
 385         $(LINK_APP)
 386
 387 # UnixWare 7 and OpenUNIX 8 native compilers used
 388 link_o.svr5:
 389         @ if ${DETECT_GNU_LD}; then \
 390                 $(DO_GNU_SO); \
 391         else \
 392                 $(CALC_VERSIONS); \
 393                 SHARE_FLAG='-G'; \
 394                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 395                 SHLIB=lib$(LIBNAME).so; \
 396                 SHLIB_SUFFIX=; \
 397                 ALLSYMSFLAGS=''; \
 398                 NOALLSYMSFLAGS=''; \
 399                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 400         fi; \
 401         $(LINK_SO_O)
 402 link_a.svr5:
 403         @ if ${DETECT_GNU_LD}; then \
 404                 $(DO_GNU_SO); \
 405         else \
 406                 $(CALC_VERSIONS); \
 407                 SHARE_FLAG='-G'; \
 408                 (${CC} -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 409                 SHLIB=lib$(LIBNAME).so; \
 410                 SHLIB_SUFFIX=; \
 411                 ALLSYMSFLAGS=''; \
 412                 NOALLSYMSFLAGS=''; \
 413                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 414         fi; \
 415         $(LINK_SO_A_UNPACKED)
 416 link_app.svr5:
 417         @${DETECT_GNU_LD} && $(DO_GNU_APP); \
 418         $(LINK_APP)
 419
 420 link_o.irix:
 421         @ if ${DETECT_GNU_LD}; then \
 422                 $(DO_GNU_SO); \
 423         else \
 424                 $(CALC_VERSIONS); \
 425                 SHLIB=lib$(LIBNAME).so; \
 426                 SHLIB_SUFFIX=; \
 427                 MINUSWL=""; \
 428                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSWL="-Wl,"; \
 429                 ALLSYMSFLAGS="$${MINUSWL}-all"; \
 430                 NOALLSYMSFLAGS="$${MINUSWL}-none"; \
 431                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,-B,symbolic"; \
 432         fi; \
 433         $(LINK_SO_O)
 434 link_a.irix:
 435         @ if ${DETECT_GNU_LD}; then \
 436                 $(DO_GNU_SO); \
 437         else \
 438                 $(CALC_VERSIONS); \
 439                 SHLIB=lib$(LIBNAME).so; \
 440                 SHLIB_SUFFIX=; \
 441                 MINUSWL=""; \
 442                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSWL="-Wl,"; \
 443                 ALLSYMSFLAGS="$${MINUSWL}-all"; \
 444                 NOALLSYMSFLAGS="$${MINUSWL}-none"; \
 445                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,-B,symbolic"; \
 446         fi; \
 447         $(LINK_SO_A)
 448 link_app.irix:
 449         @LDFLAGS="$(CFLAGS) -Wl,-rpath,$(LIBRPATH)"; \
 450         $(LINK_APP)
 451
 452 # 32-bit PA-RISC HP-UX embeds the -L pathname of libs we link with, so
 453 # we compensate for it with +cdp ../: and +cdp ./:. Yes, these rewrite
 454 # rules imply that we can only link one level down in catalog structure,
 455 # but that's what takes place for the moment of this writing. +cdp option
 456 # was introduced in HP-UX 11.x and applies in 32-bit PA-RISC link
 457 # editor context only [it's simply ignored in other cases, which are all
 458 # ELFs by the way].
 459 #
 460 link_o.hpux:
 461         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 462         $(CALC_VERSIONS); \
 463         SHLIB=lib$(LIBNAME).sl; \
 464         expr "$(CFLAGS)" : '.*DSO_DLFCN' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 465         SHLIB_SUFFIX=; \
 466         ALLSYMSFLAGS='-Wl,-Fl'; \
 467         NOALLSYMSFLAGS=''; \
 468         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 469         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,+cdp,../:,+cdp,./:"; \
 470         fi; \
 471         rm -f $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX || :; \
 472         $(LINK_SO_O) && chmod a=rx $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX
 473 link_a.hpux:
 474         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 475         $(CALC_VERSIONS); \
 476         SHLIB=lib$(LIBNAME).sl; \
 477         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 478         SHLIB_SUFFIX=; \
 479         ALLSYMSFLAGS='-Wl,-Fl'; \
 480         NOALLSYMSFLAGS=''; \
 481         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 482         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,+cdp,../:,+cdp,./:"; \
 483         fi; \
 484         rm -f $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX || :; \
 485         $(LINK_SO_A) && chmod a=rx $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX
 486 link_app.hpux:
 487         @if ${DETECT_GNU_LD}; then $(DO_GNU_APP); else \
 488         LDFLAGS="$(CFLAGS) -Wl,+s,+cdp,../:,+cdp,./:,+b,$(LIBRPATH)"; \
 489         fi; \
 490         $(LINK_APP)
 491
 492 link_o.aix:
 493         @ $(CALC_VERSIONS); \
 494         OBJECT_MODE=`expr "x$(SHARED_LDFLAGS)" : 'x\-[a-z]*\(64\)'` || :; \
 495         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 496         SHLIB=lib$(LIBNAME).so; \
 497         SHLIB_SUFFIX=; \
 498         ALLSYMSFLAGS=''; \
 499         NOALLSYMSFLAGS=''; \
 500         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-bexpall,-bnolibpath,-bM:SRE'; \
 501         $(LINK_SO_O);
 502 link_a.aix:
 503         @ $(CALC_VERSIONS); \
 504         OBJECT_MODE=`expr "x$(SHARED_LDFLAGS)" : 'x\-[a-z]*\(64\)'` || : ; \
 505         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 506         SHLIB=lib$(LIBNAME).so; \
 507         SHLIB_SUFFIX=; \
 508         ALLSYMSFLAGS='-bnogc'; \
 509         NOALLSYMSFLAGS=''; \
 510         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-bexpall,-bnolibpath,-bM:SRE'; \
 511         $(LINK_SO_A_VIA_O)
 512 link_app.aix:
 513         LDFLAGS="$(CFLAGS) -Wl,-brtl,-blibpath:$(LIBRPATH):$${LIBPATH:-/usr/lib:/lib}"; \
 514         $(LINK_APP)
 515
 516 link_o.reliantunix:
 517         @ $(CALC_VERSIONS); \
 518         SHLIB=lib$(LIBNAME).so; \
 519         SHLIB_SUFFIX=; \
 520         ALLSYMSFLAGS=; \
 521         NOALLSYMSFLAGS=''; \
 522         SHAREDFLAGS='$(CFLAGS) -G'; \
 523         $(LINK_SO_O)
 524 link_a.reliantunix:
 525         @ $(CALC_VERSIONS); \
 526         SHLIB=lib$(LIBNAME).so; \
 527         SHLIB_SUFFIX=; \
 528         ALLSYMSFLAGS=; \
 529         NOALLSYMSFLAGS=''; \
 530         SHAREDFLAGS='$(CFLAGS) -G'; \
 531         $(LINK_SO_A_UNPACKED)
 532 link_app.reliantunix:
 533         $(LINK_APP)
 534
 535 # Targets to build symbolic links when needed
 536 symlink.gnu symlink.solaris symlink.svr3 symlink.svr5 symlink.irix \
 537 symlink.aix symlink.reliantunix:
 538         @ $(CALC_VERSIONS); \
 539         SHLIB=lib$(LIBNAME).so; \
 540         $(SYMLINK_SO)
 541 symlink.darwin:
 542         @ $(CALC_VERSIONS); \
 543         SHLIB=lib$(LIBNAME); \
 544         SHLIB_SUFFIX=.dylib; \
 545         $(SYMLINK_SO)
 546 symlink.hpux:
 547         @ $(CALC_VERSIONS); \
 548         SHLIB=lib$(LIBNAME).sl; \
 549         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 550         $(SYMLINK_SO)
 551 # The following lines means those specific architectures do no symlinks
 552 symlink.cygwin symlink.alpha-osf1 symlink.tru64 symlink.tru64-rpath:
 553
 554 # Compatibility targets
 555 link_o.bsd-gcc-shared link_o.linux-shared link_o.gnu-shared: link_o.gnu
 556 link_a.bsd-gcc-shared link_a.linux-shared link_a.gnu-shared: link_a.gnu
 557 link_app.bsd-gcc-shared link_app.linux-shared link_app.gnu-shared: link_app.gnu
 558 symlink.bsd-gcc-shared symlink.bsd-shared symlink.linux-shared symlink.gnu-shared: symlink.gnu
 559 link_o.bsd-shared: link_o.bsd
 560 link_a.bsd-shared: link_a.bsd
 561 link_app.bsd-shared: link_app.bsd
 562 link_o.darwin-shared: link_o.darwin
 563 link_a.darwin-shared: link_a.darwin
 564 link_app.darwin-shared: link_app.darwin
 565 symlink.darwin-shared: symlink.darwin
 566 link_o.cygwin-shared: link_o.cygwin
 567 link_a.cygwin-shared: link_a.cygwin
 568 link_app.cygwin-shared: link_app.cygwin
 569 symlink.cygwin-shared: symlink.cygwin
 570 link_o.alpha-osf1-shared: link_o.alpha-osf1
 571 link_a.alpha-osf1-shared: link_a.alpha-osf1
 572 link_app.alpha-osf1-shared: link_app.alpha-osf1
 573 symlink.alpha-osf1-shared: symlink.alpha-osf1
 574 link_o.tru64-shared: link_o.tru64
 575 link_a.tru64-shared: link_a.tru64
 576 link_app.tru64-shared: link_app.tru64
 577 symlink.tru64-shared: symlink.tru64
 578 link_o.tru64-shared-rpath: link_o.tru64-rpath
 579 link_a.tru64-shared-rpath: link_a.tru64-rpath
 580 link_app.tru64-shared-rpath: link_app.tru64-rpath
 581 symlink.tru64-shared-rpath: symlink.tru64-rpath
 582 link_o.solaris-shared: link_o.solaris
 583 link_a.solaris-shared: link_a.solaris
 584 link_app.solaris-shared: link_app.solaris
 585 symlink.solaris-shared: symlink.solaris
 586 link_o.svr3-shared: link_o.svr3
 587 link_a.svr3-shared: link_a.svr3
 588 link_app.svr3-shared: link_app.svr3
 589 symlink.svr3-shared: symlink.svr3
 590 link_o.svr5-shared: link_o.svr5
 591 link_a.svr5-shared: link_a.svr5
 592 link_app.svr5-shared: link_app.svr5
 593 symlink.svr5-shared: symlink.svr5
 594 link_o.irix-shared: link_o.irix
 595 link_a.irix-shared: link_a.irix
 596 link_app.irix-shared: link_app.irix
 597 symlink.irix-shared: symlink.irix
 598 link_o.hpux-shared: link_o.hpux
 599 link_a.hpux-shared: link_a.hpux
 600 link_app.hpux-shared: link_app.hpux
 601 symlink.hpux-shared: symlink.hpux
 602 link_o.aix-shared: link_o.aix
 603 link_a.aix-shared: link_a.aix
 604 link_app.aix-shared: link_app.aix
 605 symlink.aix-shared: symlink.aix
 606 link_o.reliantunix-shared: link_o.reliantunix
 607 link_a.reliantunix-shared: link_a.reliantunix
 608 link_app.reliantunix-shared: link_app.reliantunix
 609 symlink.reliantunix-shared: symlink.reliantunix