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     nm -Pg $$SHOBJECTS | grep ' [BDT] ' | cut -f1 -d' ' > lib$(LIBNAME).exp; \
 105     LIBPATH=`for x in $$LIBDEPS; do if echo $$x | grep '^ *-L' > /dev/null 2>&1; then echo $$x | sed -e 's/^ *-L//'; fi; done | uniq`; \
 106     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
 107     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 108     $${SHAREDCMD} $${SHAREDFLAGS} \
 109         -o $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX \
 110         $$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS \
 111   ) && $(SYMLINK_SO); \
 112   ( $(SET_X); rm -f lib$(LIBNAME).exp )
 113
 114 SYMLINK_SO=     \
 115         if [ -n "$$INHIBIT_SYMLINKS" ]; then :; else \
 116                 prev=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 117                 if [ -n "$$SHLIB_COMPAT" ]; then \
 118                         for x in $$SHLIB_COMPAT; do \
 119                                 ( $(SET_X); rm -f $$SHLIB$$x$$SHLIB_SUFFIX; \
 120                                   ln -s $$prev $$SHLIB$$x$$SHLIB_SUFFIX ); \
 121                                 prev=$$SHLIB$$x$$SHLIB_SUFFIX; \
 122                         done; \
 123                 fi; \
 124                 if [ -n "$$SHLIB_SOVER" ]; then \
 125                         ( $(SET_X); rm -f $$SHLIB$$SHLIB_SUFFIX; \
 126                           ln -s $$prev $$SHLIB$$SHLIB_SUFFIX ); \
 127                 fi; \
 128         fi
 129
 130 LINK_SO_A=      SHOBJECTS="lib$(LIBNAME).a $(LIBEXTRAS)"; $(LINK_SO)
 131 LINK_SO_O=      SHOBJECTS="$(LIBEXTRAS)"; $(LINK_SO)
 132
 133 LINK_SO_A_VIA_O=        \
 134   SHOBJECTS=lib$(LIBNAME).o; \
 135   ALL=$$ALLSYMSFLAGS; ALLSYMSFLAGS=; NOALLSYMSFLAGS=; \
 136   ( $(SET_X); \
 137     ld $(LDFLAGS) -r -o lib$(LIBNAME).o $$ALL lib$(LIBNAME).a $(LIBEXTRAS) ); \
 138   $(LINK_SO) && rm -f $(LIBNAME).o
 139
 140 LINK_SO_A_UNPACKED=     \
 141   UNPACKDIR=link_tmp.$$$$; rm -rf $$UNPACKDIR; mkdir $$UNPACKDIR; \
 142   (cd $$UNPACKDIR; ar x ../lib$(LIBNAME).a) && \
 143   ([ -z "$(LIBEXTRAS)" ] || cp $(LIBEXTRAS) $$UNPACKDIR) && \
 144   SHOBJECTS=$$UNPACKDIR/*.o; \
 145   $(LINK_SO) && rm -rf $$UNPACKDIR
 146
 147 # NB: force pass-through in case we are calling through fipsld.
 148
 149 DETECT_GNU_LD=(FIPSLD_NPT="" FIPSLD_LIBFIPS="" ${CC} -Wl,-V /dev/null 2>&1 | grep '^GNU ld' )>/dev/null
 150
 151 DO_GNU_SO=$(CALC_VERSIONS); \
 152         SHLIB=lib$(LIBNAME).so; \
 153         SHLIB_SUFFIX=; \
 154         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 155         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 156         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"
 157
 158 DO_GNU_APP=LDFLAGS="$(CFLAGS) -Wl,-rpath,$(LIBRPATH)"
 159
 160 #This is rather special.  It's a special target with which one can link
 161 #applications without bothering with any features that have anything to
 162 #do with shared libraries, for example when linking against static
 163 #libraries.  It's mostly here to avoid a lot of conditionals everywhere
 164 #else...
 165 link_app.:
 166         $(LINK_APP)
 167
 168 link_o.gnu:
 169         @ $(DO_GNU_SO); $(LINK_SO_O)
 170 link_a.gnu:
 171         @ $(DO_GNU_SO); $(LINK_SO_A)
 172 link_app.gnu:
 173         @ $(DO_GNU_APP); $(LINK_APP)
 174
 175 link_o.bsd:
 176         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 177         $(CALC_VERSIONS); \
 178         SHLIB=lib$(LIBNAME).so; \
 179         SHLIB_SUFFIX=; \
 180         LIBDEPS=" "; \
 181         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 182         NOALLSYMSFLAGS=; \
 183         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 184         fi; $(LINK_SO_O)
 185 link_a.bsd:
 186         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 187         $(CALC_VERSIONS); \
 188         SHLIB=lib$(LIBNAME).so; \
 189         SHLIB_SUFFIX=; \
 190         LIBDEPS=" "; \
 191         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 192         NOALLSYMSFLAGS=; \
 193         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 194         fi; $(LINK_SO_A)
 195 link_app.bsd:
 196         @if ${DETECT_GNU_LD}; then $(DO_GNU_APP); else \
 197         LDFLAGS="$(CFLAGS) -Wl,-rpath,$(LIBPATH)"; \
 198         fi; $(LINK_APP)
 199
 200 # For Darwin AKA Mac OS/X (dyld)
 201 # link_o.darwin produces .so, because we let it use dso_dlfcn module,
 202 # which has .so extension hard-coded. One can argue that one should
 203 # develop special dso module for MacOS X. At least manual encourages
 204 # to use native NSModule(3) API and refers to dlfcn as termporary hack.
 205 link_o.darwin:
 206         @ $(CALC_VERSIONS); \
 207         SHLIB=lib$(LIBNAME); \
 208         SHLIB_SUFFIX=.so; \
 209         ALLSYMSFLAGS='-all_load'; \
 210         NOALLSYMSFLAGS=''; \
 211         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \
 212         if [ -n "$(LIBVERSION)" ]; then \
 213                 SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \
 214         fi; \
 215         if [ -n "$$SHLIB_SOVER_NODOT" ]; then \
 216                 SHAREDFLAGS="$$SHAREDFLAGS -compatibility_version $$SHLIB_SOVER_NODOT"; \
 217         fi; \
 218         $(LINK_SO_O)
 219 link_a.darwin:
 220         @ $(CALC_VERSIONS); \
 221         SHLIB=lib$(LIBNAME); \
 222         SHLIB_SUFFIX=.dylib; \
 223         ALLSYMSFLAGS='-all_load'; \
 224         NOALLSYMSFLAGS=''; \
 225         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \
 226         if [ -n "$(LIBVERSION)" ]; then \
 227                 SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \
 228         fi; \
 229         if [ -n "$$SHLIB_SOVER_NODOT" ]; then \
 230                 SHAREDFLAGS="$$SHAREDFLAGS -compatibility_version $$SHLIB_SOVER_NODOT"; \
 231         fi; \
 232         SHAREDFLAGS="$$SHAREDFLAGS -install_name ${INSTALLTOP}/lib/$$SHLIB${SHLIB_EXT}"; \
 233         $(LINK_SO_A)
 234 link_app.darwin:        # is there run-path on darwin?
 235         $(LINK_APP)
 236
 237 link_o.cygwin:
 238         @ $(CALC_VERSIONS); \
 239         INHIBIT_SYMLINKS=yes; \
 240         SHLIB=cyg$(LIBNAME); \
 241         expr $(PLATFORM) : 'mingw' > /dev/null && SHLIB=$(LIBNAME)eay32; \
 242         SHLIB_SUFFIX=.dll; \
 243         LIBVERSION="$(LIBVERSION)"; \
 244         SHLIB_SOVER=${LIBVERSION:+"-$(LIBVERSION)"}; \
 245         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 246         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 247         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a"; \
 248         $(LINK_SO_O)
 249 link_a.cygwin:
 250         @ $(CALC_VERSIONS); \
 251         INHIBIT_SYMLINKS=yes; \
 252         SHLIB=cyg$(LIBNAME); \
 253         expr $(PLATFORM) : 'mingw' > /dev/null && SHLIB=$(LIBNAME)eay32; \
 254         SHLIB_SUFFIX=.dll; \
 255         SHLIB_SOVER=-$(LIBVERSION); \
 256         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 257         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 258         base=;  [ $(LIBNAME) = "crypto" ] && base=-Wl,--image-base,0x63000000; \
 259         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a"; \
 260         [ -f apps/$$SHLIB$$SHLIB_SUFFIX ] && rm apps/$$SHLIB$$SHLIB_SUFFIX; \
 261         [ -f test/$$SHLIB$$SHLIB_SUFFIX ] && rm test/$$SHLIB$$SHLIB_SUFFIX; \
 262         $(LINK_SO_A) || exit 1; \
 263         cp -p $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX apps/; \
 264         cp -p $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX test/
 265 link_app.cygwin:
 266         $(LINK_APP)
 267
 268 link_o.alpha-osf1:
 269         @ if ${DETECT_GNU_LD}; then \
 270                 $(DO_GNU_SO); \
 271         else \
 272                 SHLIB=lib$(LIBNAME).so; \
 273                 SHLIB_SUFFIX=; \
 274                 SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
 275                 if [ -n "$$SHLIB_HIST" ]; then \
 276                         SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
 277                 else \
 278                         SHLIB_HIST="$(LIBVERSION)"; \
 279                 fi; \
 280                 SHLIB_SOVER=; \
 281                 ALLSYMSFLAGS='-all'; \
 282                 NOALLSYMSFLAGS='-none'; \
 283                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared"; \
 284                 if [ -n "$$SHLIB_HIST" ]; then \
 285                         SHAREDFLAGS="$$SHAREDFLAGS -set_version $$SHLIB_HIST"; \
 286                 fi; \
 287         fi; \
 288         $(LINK_SO_O)
 289 link_a.alpha-osf1:
 290         @ if ${DETECT_GNU_LD}; then \
 291                 $(DO_GNU_SO); \
 292         else \
 293                 SHLIB=lib$(LIBNAME).so; \
 294                 SHLIB_SUFFIX=; \
 295                 SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
 296                 if [ -n "$$SHLIB_HIST" ]; then \
 297                         SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
 298                 else \
 299                         SHLIB_HIST="$(LIBVERSION)"; \
 300                 fi; \
 301                 SHLIB_SOVER=; \
 302                 ALLSYMSFLAGS='-all'; \
 303                 NOALLSYMSFLAGS='-none'; \
 304                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared"; \
 305                 if [ -n "$$SHLIB_HIST" ]; then \
 306                         SHAREDFLAGS="$$SHAREDFLAGS -set_version $$SHLIB_HIST"; \
 307                 fi; \
 308         fi; \
 309         $(LINK_SO_A)
 310 link_app.alpha-osf1:
 311         @if ${DETECT_GNU_LD}; then \
 312                 $(DO_GNU_APP); \
 313         else \
 314                 LDFLAGS="$(CFLAGS) -rpath $(LIBRPATH)"; \
 315         fi; \
 316         $(LINK_APP)
 317
 318 link_o.solaris:
 319         @ if ${DETECT_GNU_LD}; then \
 320                 $(DO_GNU_SO); \
 321         else \
 322                 $(CALC_VERSIONS); \
 323                 MINUSZ='-z '; \
 324                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSZ='-Wl,-z,'; \
 325                 SHLIB=lib$(LIBNAME).so; \
 326                 SHLIB_SUFFIX=; \
 327                 ALLSYMSFLAGS="$${MINUSZ}allextract"; \
 328                 NOALLSYMSFLAGS="$${MINUSZ}defaultextract"; \
 329                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 330         fi; \
 331         $(LINK_SO_O)
 332 link_a.solaris:
 333         @ if ${DETECT_GNU_LD}; then \
 334                 $(DO_GNU_SO); \
 335         else \
 336                 $(CALC_VERSIONS); \
 337                 MINUSZ='-z '; \
 338                 (${CC} -v 2>&1 | grep gcc) > /dev/null && MINUSZ='-Wl,-z,'; \
 339                 SHLIB=lib$(LIBNAME).so; \
 340                 SHLIB_SUFFIX=;\
 341                 ALLSYMSFLAGS="$${MINUSZ}allextract"; \
 342                 NOALLSYMSFLAGS="$${MINUSZ}defaultextract"; \
 343                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 344         fi; \
 345         $(LINK_SO_A)
 346 link_app.solaris:
 347         @ if ${DETECT_GNU_LD}; then \
 348                 $(DO_GNU_APP); \
 349         else \
 350                 LDFLAGS="$(CFLAGS) -R $(LIBRPATH)"; \
 351         fi; \
 352         $(LINK_APP)
 353
 354 # OpenServer 5 native compilers used
 355 link_o.svr3:
 356         @ if ${DETECT_GNU_LD}; then \
 357                 $(DO_GNU_SO); \
 358         else \
 359                 $(CALC_VERSIONS); \
 360                 SHLIB=lib$(LIBNAME).so; \
 361                 SHLIB_SUFFIX=; \
 362                 ALLSYMSFLAGS=''; \
 363                 NOALLSYMSFLAGS=''; \
 364                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 365         fi; \
 366         $(LINK_SO_O)
 367 link_a.svr3:
 368         @ if ${DETECT_GNU_LD}; then \
 369                 $(DO_GNU_SO); \
 370         else \
 371                 $(CALC_VERSIONS); \
 372                 SHLIB=lib$(LIBNAME).so; \
 373                 SHLIB_SUFFIX=; \
 374                 ALLSYMSFLAGS=''; \
 375                 NOALLSYMSFLAGS=''; \
 376                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 377         fi; \
 378         $(LINK_SO_A_UNPACKED)
 379 link_app.svr3:
 380         @${DETECT_GNU_LD} && $(DO_GNU_APP); \
 381         $(LINK_APP)
 382
 383 # UnixWare 7 and OpenUNIX 8 native compilers used
 384 link_o.svr5:
 385         @ if ${DETECT_GNU_LD}; then \
 386                 $(DO_GNU_SO); \
 387         else \
 388                 $(CALC_VERSIONS); \
 389                 SHARE_FLAG='-G'; \
 390                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 391                 SHLIB=lib$(LIBNAME).so; \
 392                 SHLIB_SUFFIX=; \
 393                 ALLSYMSFLAGS=''; \
 394                 NOALLSYMSFLAGS=''; \
 395                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 396         fi; \
 397         $(LINK_SO_O)
 398 link_a.svr5:
 399         @ if ${DETECT_GNU_LD}; then \
 400                 $(DO_GNU_SO); \
 401         else \
 402                 $(CALC_VERSIONS); \
 403                 SHARE_FLAG='-G'; \
 404                 (${CC} -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 405                 SHLIB=lib$(LIBNAME).so; \
 406                 SHLIB_SUFFIX=; \
 407                 ALLSYMSFLAGS=''; \
 408                 NOALLSYMSFLAGS=''; \
 409                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 410         fi; \
 411         $(LINK_SO_A_UNPACKED)
 412 link_app.svr5:
 413         @${DETECT_GNU_LD} && $(DO_GNU_APP); \
 414         $(LINK_APP)
 415
 416 link_o.irix:
 417         @ if ${DETECT_GNU_LD}; then \
 418                 $(DO_GNU_SO); \
 419         else \
 420                 $(CALC_VERSIONS); \
 421                 SHLIB=lib$(LIBNAME).so; \
 422                 SHLIB_SUFFIX=; \
 423                 MINUSWL=""; \
 424                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSWL="-Wl,"; \
 425                 ALLSYMSFLAGS="$${MINUSWL}-all"; \
 426                 NOALLSYMSFLAGS="$${MINUSWL}-none"; \
 427                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 428         fi; \
 429         $(LINK_SO_O)
 430 link_a.irix:
 431         @ if ${DETECT_GNU_LD}; then \
 432                 $(DO_GNU_SO); \
 433         else \
 434                 $(CALC_VERSIONS); \
 435                 SHLIB=lib$(LIBNAME).so; \
 436                 SHLIB_SUFFIX=; \
 437                 MINUSWL=""; \
 438                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSWL="-Wl,"; \
 439                 ALLSYMSFLAGS="$${MINUSWL}-all"; \
 440                 NOALLSYMSFLAGS="$${MINUSWL}-none"; \
 441                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 442         fi; \
 443         $(LINK_SO_A)
 444 link_app.irix:
 445         @LDFLAGS="$(CFLAGS) -Wl,-rpath,$(LIBRPATH)"; \
 446         $(LINK_APP)
 447
 448 # 32-bit PA-RISC HP-UX embeds the -L pathname of libs we link with, so
 449 # we compensate for it with +cdp ../: and +cdp ./:. Yes, these rewrite
 450 # rules imply that we can only link one level down in catalog structure,
 451 # but that's what takes place for the moment of this writing. +cdp option
 452 # was introduced in HP-UX 11.x and applies in 32-bit PA-RISC link
 453 # editor context only [it's simply ignored in other cases, which are all
 454 # ELFs by the way].
 455 #
 456 link_o.hpux:
 457         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 458         $(CALC_VERSIONS); \
 459         SHLIB=lib$(LIBNAME).sl; \
 460         expr "$(CFLAGS)" : '.*DSO_DLFCN' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 461         SHLIB_SUFFIX=; \
 462         ALLSYMSFLAGS='-Wl,-Fl'; \
 463         NOALLSYMSFLAGS=''; \
 464         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 465         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 466         fi; \
 467         rm -f $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX || :; \
 468         $(LINK_SO_O) && chmod a=rx $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX
 469 link_a.hpux:
 470         @if ${DETECT_GNU_LD}; then $(DO_GNU_SO); else \
 471         $(CALC_VERSIONS); \
 472         SHLIB=lib$(LIBNAME).sl; \
 473         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 474         SHLIB_SUFFIX=; \
 475         ALLSYMSFLAGS='-Wl,-Fl'; \
 476         NOALLSYMSFLAGS=''; \
 477         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 478         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 479         fi; \
 480         rm -f $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX || :; \
 481         $(LINK_SO_A) && chmod a=rx $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX
 482 link_app.hpux:
 483         @if ${DETECT_GNU_LD}; then $(DO_GNU_APP); else \
 484         LDFLAGS="$(CFLAGS) -Wl,+s,+cdp,../:,+cdp,./:,+b,$(LIBRPATH)"; \
 485         fi; \
 486         $(LINK_APP)
 487
 488 link_o.aix:
 489         @ $(CALC_VERSIONS); \
 490         OBJECT_MODE=`expr x$(SHARED_LDFLAGS) : 'x\-[a-z]\([0-9]*\)'`; \
 491         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 492         SHLIB=lib$(LIBNAME).so; \
 493         SHLIB_SUFFIX=; \
 494         ALLSYMSFLAGS='-bnogc'; \
 495         NOALLSYMSFLAGS=''; \
 496         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -G -bE:lib$(LIBNAME).exp -bM:SRE'; \
 497         $(LINK_SO_O); rm -rf lib$(LIBNAME).exp
 498 link_a.aix:
 499         @ $(CALC_VERSIONS); \
 500         OBJECT_MODE=`expr x$(SHARED_LDFLAGS) : 'x\-[a-z]\([0-9]*\)'`; \
 501         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 502         SHLIB=lib$(LIBNAME).so; \
 503         SHLIB_SUFFIX=; \
 504         ALLSYMSFLAGS='-bnogc'; \
 505         NOALLSYMSFLAGS=''; \
 506         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -G -bE:lib$(LIBNAME).exp -bM:SRE'; \
 507         $(LINK_SO_A_VIA_O)
 508 link_app.aix:
 509         LDFLAGS="$(CFLAGS) -blibpath:$(LIBRPATH):$${LIBPATH:-/usr/lib:/lib}"; \
 510         $(LINK_APP)
 511
 512 link_o.reliantunix:
 513         @ $(CALC_VERSIONS); \
 514         SHLIB=lib$(LIBNAME).so; \
 515         SHLIB_SUFFIX=; \
 516         ALLSYMSFLAGS=; \
 517         NOALLSYMSFLAGS=''; \
 518         SHAREDFLAGS='$(CFLAGS) -G'; \
 519         $(LINK_SO_O)
 520 link_a.reliantunix:
 521         @ $(CALC_VERSIONS); \
 522         SHLIB=lib$(LIBNAME).so; \
 523         SHLIB_SUFFIX=; \
 524         ALLSYMSFLAGS=; \
 525         NOALLSYMSFLAGS=''; \
 526         SHAREDFLAGS='$(CFLAGS) -G'; \
 527         $(LINK_SO_A_UNPACKED)
 528 link_app.reliantunix:
 529         $(LINK_APP)
 530
 531 # Targets to build symbolic links when needed
 532 symlink.gnu symlink.solaris symlink.svr3 symlink.svr5 symlink.irix \
 533 symlink.aix symlink.reliantunix:
 534         @ $(CALC_VERSIONS); \
 535         SHLIB=lib$(LIBNAME).so; \
 536         $(SYMLINK_SO)
 537 symlink.darwin:
 538         @ $(CALC_VERSIONS); \
 539         SHLIB=lib$(LIBNAME); \
 540         SHLIB_SUFFIX=.dylib; \
 541         $(SYMLINK_SO)
 542 symlink.hpux:
 543         @ $(CALC_VERSIONS); \
 544         SHLIB=lib$(LIBNAME).sl; \
 545         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 546         $(SYMLINK_SO)
 547 # The following lines means those specific architectures do no symlinks
 548 symlink.cygwin symlink.alpha-osf1 symlink.tru64 symlink.tru64-rpath:
 549
 550 # Compatibility targets
 551 link_o.bsd-gcc-shared link_o.linux-shared link_o.gnu-shared: link_o.gnu
 552 link_a.bsd-gcc-shared link_a.linux-shared link_a.gnu-shared: link_a.gnu
 553 link_app.bsd-gcc-shared link_app.linux-shared link_app.gnu-shared: link_app.gnu
 554 symlink.bsd-gcc-shared symlink.bsd-shared symlink.linux-shared symlink.gnu-shared: symlink.gnu
 555 link_o.bsd-shared: link_o.bsd
 556 link_a.bsd-shared: link_a.bsd
 557 link_app.bsd-shared: link_app.bsd
 558 link_o.darwin-shared: link_o.darwin
 559 link_a.darwin-shared: link_a.darwin
 560 link_app.darwin-shared: link_app.darwin
 561 symlink.darwin-shared: symlink.darwin
 562 link_o.cygwin-shared: link_o.cygwin
 563 link_a.cygwin-shared: link_a.cygwin
 564 link_app.cygwin-shared: link_app.cygwin
 565 symlink.cygwin-shared: symlink.cygwin
 566 link_o.alpha-osf1-shared: link_o.alpha-osf1
 567 link_a.alpha-osf1-shared: link_a.alpha-osf1
 568 link_app.alpha-osf1-shared: link_app.alpha-osf1
 569 symlink.alpha-osf1-shared: symlink.alpha-osf1
 570 link_o.tru64-shared: link_o.tru64
 571 link_a.tru64-shared: link_a.tru64
 572 link_app.tru64-shared: link_app.tru64
 573 symlink.tru64-shared: symlink.tru64
 574 link_o.tru64-shared-rpath: link_o.tru64-rpath
 575 link_a.tru64-shared-rpath: link_a.tru64-rpath
 576 link_app.tru64-shared-rpath: link_app.tru64-rpath
 577 symlink.tru64-shared-rpath: symlink.tru64-rpath
 578 link_o.solaris-shared: link_o.solaris
 579 link_a.solaris-shared: link_a.solaris
 580 link_app.solaris-shared: link_app.solaris
 581 symlink.solaris-shared: symlink.solaris
 582 link_o.svr3-shared: link_o.svr3
 583 link_a.svr3-shared: link_a.svr3
 584 link_app.svr3-shared: link_app.svr3
 585 symlink.svr3-shared: symlink.svr3
 586 link_o.svr5-shared: link_o.svr5
 587 link_a.svr5-shared: link_a.svr5
 588 link_app.svr5-shared: link_app.svr5
 589 symlink.svr5-shared: symlink.svr5
 590 link_o.irix-shared: link_o.irix
 591 link_a.irix-shared: link_a.irix
 592 link_app.irix-shared: link_app.irix
 593 symlink.irix-shared: symlink.irix
 594 link_o.hpux-shared: link_o.hpux
 595 link_a.hpux-shared: link_a.hpux
 596 link_app.hpux-shared: link_app.hpux
 597 symlink.hpux-shared: symlink.hpux
 598 link_o.aix-shared: link_o.aix
 599 link_a.aix-shared: link_a.aix
 600 link_app.aix-shared: link_app.aix
 601 symlink.aix-shared: symlink.aix
 602 link_o.reliantunix-shared: link_o.reliantunix
 603 link_a.reliantunix-shared: link_a.reliantunix
 604 link_app.reliantunix-shared: link_app.reliantunix
 605 symlink.reliantunix-shared: symlink.reliantunix