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