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=$(CFLAG)
  11 # LDFLAGS contains flags to be used when temporary object files (when building
  12 # shared libraries) are created, or when an application is linked.
  13 # SHARED_LDFLAGS contains flags to be used when the shared library is created.
  14 LDFLAGS=$(LDFLAG)
  15 SHARED_LDFLAGS=$(SHARED_LDFLAG)
  16
  17 # SHARED_RCFLAGS are flags used with windres, i.e. when build for Cygwin
  18 # or Mingw.
  19 SHARED_RCFLAGS=$(SHARED_RCFLAG)
  20
  21 NM=nm
  22
  23 # LIBNAME contains just the name of the library, without prefix ("lib"
  24 # on Unix, "cyg" for certain forms under Cygwin...) or suffix (.a, .so,
  25 # .dll, ...).  This one MUST have a value when using this makefile to
  26 # build shared libraries.
  27 # For example, to build libfoo.so, you need to do the following:
  28 #LIBNAME=foo
  29 LIBNAME=
  30
  31 # APPNAME contains just the name of the application, without suffix (""
  32 # on Unix, ".exe" on Windows, ...).  This one MUST have a value when using
  33 # this makefile to build applications.
  34 # For example, to build foo, you need to do the following:
  35 #APPNAME=foo
  36 APPNAME=
  37
  38 # DSTDIR is the directory where the built file should end up in.
  39 DSTDIR=.
  40
  41 # SRCDIR is the top directory of the source tree.
  42 SRCDIR=.
  43
  44 # OBJECTS contains all the object files to link together into the application.
  45 # This must contain at least one object file.
  46 #OBJECTS=foo.o
  47 OBJECTS=
  48
  49 # LIBEXTRAS contains extra modules to link together with the library.
  50 # For example, if a second library, say libbar.a needs to be linked into
  51 # libfoo.so, you need to do the following:
  52 #LIBEXTRAS=libbar.a
  53 # Note that this MUST be used when using the link_dso targets, to hold the
  54 # names of all object files that go into the target shared object.
  55 LIBEXTRAS=
  56
  57 # LIBVERSION contains the current version of the library.
  58 # For example, to build libfoo.so.1.2, you need to do the following:
  59 #LIBVERSION=1.2
  60 LIBVERSION=
  61
  62 # LIBCOMPATVERSIONS contains the compatibility versions (a list) of
  63 # the library.  They MUST be in decreasing order.
  64 # For example, if libfoo.so.1.2.1 is backward compatible with libfoo.so.1.2
  65 # and libfoo.so.1, you need to do the following:
  66 #LIBCOMPATVERSIONS=1.2 1
  67 # Note that on systems that use sonames, the last number will appear as
  68 # part of it.
  69 # It's also possible, for systems that support it (Tru64, for example),
  70 # to add extra compatibility info with more precision, by adding a second
  71 # list of versions, separated from the first with a semicolon, like this:
  72 #LIBCOMPATVERSIONS=1.2 1;1.2.0 1.1.2 1.1.1 1.1.0 1.0.0
  73 LIBCOMPATVERSIONS=
  74
  75 # LIBDEPS contains all the flags necessary to cover all necessary
  76 # dependencies to other libraries.
  77 LIBDEPS=
  78
  79 #------------------------------------------------------------------------------
  80 # The rest is private to this makefile.
  81
  82 SET_X=:
  83 #SET_X=set -x
  84
  85 top:
  86         echo "Trying to use this makefile interactively?  Don't."
  87
  88 CALC_VERSIONS=  \
  89         SHLIB_COMPAT=; SHLIB_SOVER=; \
  90         if [ -n "$(LIBVERSION)$(LIBCOMPATVERSIONS)" ]; then \
  91                 prev=""; \
  92                 for v in `echo "$(LIBVERSION) $(LIBCOMPATVERSIONS)" | cut -d';' -f1`; do \
  93                         SHLIB_SOVER_NODOT=$$v; \
  94                         SHLIB_SOVER=.$$v; \
  95                         if [ -n "$$prev" ]; then \
  96                                 SHLIB_COMPAT="$$SHLIB_COMPAT .$$prev"; \
  97                         fi; \
  98                         prev=$$v; \
  99                 done; \
 100         fi
 101
 102 LINK_APP=       \
 103   ( $(SET_X);   \
 104     LIBDEPS="$${LIBDEPS:-$(LIBDEPS)}"; \
 105     LDCMD="$${LDCMD:-$(CC)}"; LDFLAGS="$${LDFLAGS:-$(CFLAGS) $(LDFLAGS)}"; \
 106     LIBPATH=`for x in $$LIBDEPS; do echo $$x; done | sed -e 's/^ *-L//;t' -e d | uniq`; \
 107     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
 108     echo LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 109         $${LDCMD} $${LDFLAGS} -o $${APPNAME:=$(APPNAME)} $(OBJECTS) $${LIBDEPS}; \
 110     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 111     $${LDCMD} $${LDFLAGS} -o $${APPNAME:=$(APPNAME)} $(OBJECTS) $${LIBDEPS} )
 112
 113 LINK_SO=        \
 114   ( $(SET_X);   \
 115     LIBDEPS="$${LIBDEPS:-$(LIBDEPS)}"; \
 116     SHAREDCMD="$${SHAREDCMD:-$(CC)}"; \
 117     SHAREDFLAGS="$${SHAREDFLAGS:-$(CFLAGS) $(SHARED_LDFLAGS)}"; \
 118     LIBPATH=`for x in $$LIBDEPS; do echo $$x; done | sed -e 's/^ *-L//;t' -e d | uniq`; \
 119     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
 120     echo LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 121          $${SHAREDCMD} $${SHAREDFLAGS} \
 122              -o $(DSTDIR)/$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX \
 123              $$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS; \
 124     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 125     $${SHAREDCMD} $${SHAREDFLAGS} \
 126         -o $(DSTDIR)/$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX \
 127         $$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS \
 128   ) && $(SYMLINK_SO)
 129
 130 SYMLINK_SO=     \
 131         if [ -n "$$INHIBIT_SYMLINKS" ]; then :; else \
 132                 prev=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 133                 if [ -n "$$SHLIB_COMPAT" ]; then \
 134                         for x in $$SHLIB_COMPAT; do \
 135                                 ( $(SET_X); rm -f $(DSTDIR)/$$SHLIB$$x$$SHLIB_SUFFIX; \
 136                                   ln -s $$prev $(DSTDIR)/$$SHLIB$$x$$SHLIB_SUFFIX ); \
 137                                 prev=$$SHLIB$$x$$SHLIB_SUFFIX; \
 138                         done; \
 139                 fi; \
 140                 if [ -n "$$SHLIB_SOVER" ]; then \
 141                         ( $(SET_X); rm -f $(DSTDIR)/$$SHLIB$$SHLIB_SUFFIX; \
 142                           ln -s $$prev $(DSTDIR)/$$SHLIB$$SHLIB_SUFFIX ); \
 143                 fi; \
 144         fi
 145
 146 LINK_SO_SHLIB=  SHOBJECTS="$(DSTDIR)/lib$(LIBNAME).a $(LIBEXTRAS)"; $(LINK_SO)
 147 LINK_SO_DSO=    INHIBIT_SYMLINKS=yes; SHOBJECTS="$(LIBEXTRAS)"; $(LINK_SO)
 148
 149 LINK_SO_SHLIB_VIA_O=    \
 150   SHOBJECTS=$(DSTDIR)/lib$(LIBNAME).o; \
 151   ALL=$$ALLSYMSFLAGS; ALLSYMSFLAGS=; NOALLSYMSFLAGS=; \
 152   ( echo ld $(LDFLAGS) -r -o $$SHOBJECTS.o $$ALL lib$(LIBNAME).a $(LIBEXTRAS); \
 153     ld $(LDFLAGS) -r -o $$SHOBJECTS.o $$ALL $(DSTDIR)/lib$(LIBNAME).a $(LIBEXTRAS) ); \
 154   $(LINK_SO) && ( echo rm -f $$SHOBJECTS; rm -f $$SHOBJECTS )
 155
 156 LINK_SO_SHLIB_UNPACKED= \
 157   UNPACKDIR=link_tmp.$$$$; rm -rf $$UNPACKDIR; mkdir $$UNPACKDIR; \
 158   (cd $$UNPACKDIR; ar x ../$(DSTDIR)/lib$(LIBNAME).a) && \
 159   ([ -z "$(LIBEXTRAS)" ] || cp $(LIBEXTRAS) $$UNPACKDIR) && \
 160   SHOBJECTS=$$UNPACKDIR/*.o; \
 161   $(LINK_SO) && rm -rf $$UNPACKDIR
 162
 163 DETECT_GNU_LD=($(CC) -Wl,-V /dev/null 2>&1 | grep '^GNU ld' )>/dev/null
 164
 165 DO_GNU_SO_NOCALC=\
 166         SHLIB=lib$(LIBNAME).so; \
 167         SHLIB_SUFFIX=; \
 168         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 169         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 170         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"
 171 DO_GNU_SO=$(CALC_VERSIONS); $(DO_GNU_SO_NOCALC); SHLIB=lib$$SHLIB
 172 DO_GNU_APP=LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,-rpath,$(LIBRPATH)"
 173
 174 #This is rather special.  It's a special target with which one can link
 175 #applications without bothering with any features that have anything to
 176 #do with shared libraries, for example when linking against static
 177 #libraries.  It's mostly here to avoid a lot of conditionals everywhere
 178 #else...
 179 link_app.:
 180         $(LINK_APP)
 181
 182 link_dso.gnu:
 183         @ $(DO_GNU_SO_NOCALC); $(LINK_SO_DSO)
 184 link_shlib.gnu:
 185         @ $(DO_GNU_SO); $(LINK_SO_SHLIB)
 186 link_app.gnu:
 187         @ $(DO_GNU_APP); $(LINK_APP)
 188
 189 link_shlib.linux-shared:
 190         @if [ $(LIBNAME) != "crypto" -a $(LIBNAME) != "ssl" ]; then $(DO_GNU_SO); else \
 191         $(PERL) $(SRCDIR)/util/mkdef.pl $(LIBNAME) linux >$(LIBNAME).map; \
 192         $(CALC_VERSIONS); \
 193         SHLIB=lib$(LIBNAME).so; \
 194         SHLIB_SUFFIX=; \
 195         ALLSYMSFLAGS='-Wl,--whole-archive,--version-script=$(LIBNAME).map'; \
 196         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 197         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 198         fi; $(LINK_SO_SHLIB)
 199
 200 link_dso.bsd:
 201         @if $(DETECT_GNU_LD); then $(DO_GNU_SO_NOCALC); else \
 202         SHLIB=lib$(LIBNAME).so; \
 203         SHLIB_SUFFIX=; \
 204         LIBDEPS=" "; \
 205         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 206         NOALLSYMSFLAGS=; \
 207         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 208         fi; $(LINK_SO_DSO)
 209 link_shlib.bsd:
 210         @if $(DETECT_GNU_LD); then $(DO_GNU_SO); else \
 211         $(CALC_VERSIONS); \
 212         SHLIB=lib$(LIBNAME).so; \
 213         SHLIB_SUFFIX=; \
 214         LIBDEPS=" "; \
 215         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 216         NOALLSYMSFLAGS=; \
 217         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 218         fi; $(LINK_SO_SHLIB)
 219 link_app.bsd:
 220         @if $(DETECT_GNU_LD); then $(DO_GNU_APP); else \
 221         LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,-rpath,$(LIBPATH)"; \
 222         fi; $(LINK_APP)
 223
 224 # For Darwin AKA Mac OS/X (dyld)
 225 # Originally link_dso.darwin produced .so, because it was hard-coded
 226 # in dso_dlfcn module. At later point dso_dlfcn switched to .dylib
 227 # extension in order to allow for run-time linking with vendor-
 228 # supplied shared libraries such as libz, so that link_dso.darwin had
 229 # to be harmonized with it. This caused minor controversy, because
 230 # it was believed that dlopen can't be used to dynamically load
 231 # .dylib-s, only so called bundle modules (ones linked with -bundle
 232 # flag). The belief seems to be originating from pre-10.4 release,
 233 # where dlfcn functionality was emulated by dlcompat add-on. In
 234 # 10.4 dlopen was rewritten as native part of dyld and is documented
 235 # to be capable of loading both dynamic libraries and bundles. In
 236 # order to provide compatibility with pre-10.4 dlopen, modules are
 237 # linked with -bundle flag, which makes .dylib extension misleading.
 238 # It works, because dlopen is [and always was] extension-agnostic.
 239 # Alternative to this heuristic approach is to develop specific
 240 # MacOS X dso module relying on whichever "native" dyld interface.
 241 link_dso.darwin:
 242         @ SHLIB=lib$(LIBNAME); \
 243         SHLIB_SUFFIX=.dylib; \
 244         ALLSYMSFLAGS='-all_load'; \
 245         NOALLSYMSFLAGS=''; \
 246         SHAREDFLAGS="$(CFLAGS) `echo $(SHARED_LDFLAGS) | sed s/dynamiclib/bundle/`"; \
 247         $(LINK_SO_DSO)
 248 link_shlib.darwin:
 249         @ $(CALC_VERSIONS); \
 250         SHLIB=lib$(LIBNAME); \
 251         SHLIB_SUFFIX=.dylib; \
 252         ALLSYMSFLAGS='-all_load'; \
 253         NOALLSYMSFLAGS=''; \
 254         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \
 255         if [ -n "$(LIBVERSION)" ]; then \
 256                 SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \
 257         fi; \
 258         if [ -n "$$SHLIB_SOVER_NODOT" ]; then \
 259                 SHAREDFLAGS="$$SHAREDFLAGS -compatibility_version $$SHLIB_SOVER_NODOT"; \
 260         fi; \
 261         SHAREDFLAGS="$$SHAREDFLAGS -install_name $(INSTALLTOP)/$(LIBDIR)/$$SHLIB$(SHLIB_EXT)"; \
 262         $(LINK_SO_SHLIB)
 263 link_app.darwin:        # is there run-path on darwin?
 264         $(LINK_APP)
 265
 266 link_dso.cygwin:
 267         INHIBIT_SYMLINKS=yes; \
 268         SHLIB=cyg$(LIBNAME); \
 269         base=-Wl,--enable-auto-image-base; \
 270         deffile=; \
 271         if expr $(PLATFORM) : 'mingw' > /dev/null; then \
 272                 SHLIB=$(LIBNAME)eay32; base=; \
 273                 if test -f $(LIBNAME)eay32.def; then \
 274                         deffile=$(LIBNAME)eay32.def; \
 275                 fi; \
 276         fi; \
 277         SHLIB_SUFFIX=.dll; \
 278         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 279         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 280         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base $$deffile -Wl,-Bsymbolic"; \
 281         $(LINK_SO_DSO)
 282 #for mingw target if def-file is in use dll-name should match library-name
 283 link_shlib.cygwin:
 284         @ $(CALC_VERSIONS); \
 285         INHIBIT_SYMLINKS=yes; \
 286         SHLIB=cyg$(LIBNAME); SHLIB_SOVER=-$(LIBVERSION); SHLIB_SUFFIX=.dll; \
 287         dll_name=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; extras=; \
 288         base=-Wl,--enable-auto-image-base; \
 289         if expr $(PLATFORM) : 'mingw' > /dev/null; then \
 290                 case $(LIBNAME) in \
 291                         crypto) SHLIB=libeay;; \
 292                         ssl) SHLIB=ssleay;; \
 293                 esac; \
 294                 SHLIB_SOVER=32; \
 295                 extras="$(LIBNAME).def"; \
 296                 $(PERL) $(SRCDIR)/util/mkdef.pl 32 $$SHLIB > $$extras; \
 297                 base=; [ $(LIBNAME) = "crypto" ] && base=-Wl,--image-base,0x63000000; \
 298         fi; \
 299         dll_name=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 300         echo "$(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name |" \
 301                      "$(CROSS_COMPILE)windres $(SHARED_RCFLAGS) -o rc.o"; \
 302         $(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name | \
 303                 $(CROSS_COMPILE)windres $(SHARED_RCFLAGS) -o rc.o; \
 304         extras="$$extras rc.o"; \
 305         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 306         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 307         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a $$extras"; \
 308         $(LINK_SO_SHLIB) || exit 1; \
 309         rm $$extras
 310 link_app.cygwin:
 311         $(LINK_APP)
 312
 313 link_dso.alpha-osf1:
 314         @ if $(DETECT_GNU_LD); then \
 315                 $(DO_GNU_SO_NOCALC); \
 316         else \
 317                 SHLIB=lib$(LIBNAME).so; \
 318                 SHLIB_SUFFIX=; \
 319                 ALLSYMSFLAGS='-all'; \
 320                 NOALLSYMSFLAGS='-none'; \
 321                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-B,symbolic"; \
 322         fi; \
 323         $(LINK_SO_DSO)
 324 link_shlib.alpha-osf1:
 325         @ if $(DETECT_GNU_LD); then \
 326                 $(DO_GNU_SO); \
 327         else \
 328                 SHLIB=lib$(LIBNAME).so; \
 329                 SHLIB_SUFFIX=; \
 330                 SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
 331                 if [ -n "$$SHLIB_HIST" ]; then \
 332                         SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
 333                 else \
 334                         SHLIB_HIST="$(LIBVERSION)"; \
 335                 fi; \
 336                 SHLIB_SOVER=; \
 337                 ALLSYMSFLAGS='-all'; \
 338                 NOALLSYMSFLAGS='-none'; \
 339                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-B,symbolic"; \
 340                 if [ -n "$$SHLIB_HIST" ]; then \
 341                         SHAREDFLAGS="$$SHAREDFLAGS -set_version $$SHLIB_HIST"; \
 342                 fi; \
 343         fi; \
 344         $(LINK_SO_SHLIB)
 345 link_app.alpha-osf1:
 346         @if $(DETECT_GNU_LD); then \
 347                 $(DO_GNU_APP); \
 348         else \
 349                 LDFLAGS="$(CFLAGS) $(LDFLAGS) -rpath $(LIBRPATH)"; \
 350         fi; \
 351         $(LINK_APP)
 352
 353 link_dso.solaris:
 354         @ if $(DETECT_GNU_LD); then \
 355                 $(DO_GNU_SO_NOCALC); \
 356         else \
 357                 $(CALC_VERSIONS); \
 358                 SHLIB=lib$(LIBNAME).so; \
 359                 SHLIB_SUFFIX=; \
 360                 ALLSYMSFLAGS="-Wl,-z,allextract"; \
 361                 NOALLSYMSFLAGS="-Wl,-z,defaultextract"; \
 362                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 363         fi; \
 364         $(LINK_SO_DSO)
 365 link_shlib.solaris:
 366         @ if $(DETECT_GNU_LD); then \
 367                 $(DO_GNU_SO); \
 368         else \
 369                 $(CALC_VERSIONS); \
 370                 SHLIB=lib$(LIBNAME).so; \
 371                 SHLIB_SUFFIX=;\
 372                 if [ $(LIBNAME) != "crypto" -a $(LIBNAME) != "ssl" ]; then \
 373                         ALLSYMSFLAGS="-Wl,-z,allextract"; \
 374                 else \
 375                         $(PERL) $(SRCDIR)/util/mkdef.pl $(LIBNAME) linux >$(LIBNAME).map; \
 376                         ALLSYMSFLAGS="-Wl,-z,allextract,-M,$(LIBNAME).map"; \
 377                 fi; \
 378                 NOALLSYMSFLAGS="-Wl,-z,defaultextract"; \
 379                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 380         fi; \
 381         $(LINK_SO_SHLIB)
 382 link_app.solaris:
 383         @ if $(DETECT_GNU_LD); then \
 384                 $(DO_GNU_APP); \
 385         else \
 386                 LDFLAGS="$(CFLAGS) $(LDFLAGS) -R $(LIBRPATH)"; \
 387         fi; \
 388         $(LINK_APP)
 389
 390 # OpenServer 5 native compilers used
 391 link_dso.svr3:
 392         @ if $(DETECT_GNU_LD); then \
 393                 $(DO_GNU_SO_NOCALC); \
 394         else \
 395                 $(CALC_VERSIONS); \
 396                 SHLIB=lib$(LIBNAME).so; \
 397                 SHLIB_SUFFIX=; \
 398                 ALLSYMSFLAGS=''; \
 399                 NOALLSYMSFLAGS=''; \
 400                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SUFFIX"; \
 401         fi; \
 402         $(LINK_SO_DSO)
 403 link_shlib.svr3:
 404         @ if $(DETECT_GNU_LD); then \
 405                 $(DO_GNU_SO); \
 406         else \
 407                 $(CALC_VERSIONS); \
 408                 SHLIB=lib$(LIBNAME).so; \
 409                 SHLIB_SUFFIX=; \
 410                 ALLSYMSFLAGS=''; \
 411                 NOALLSYMSFLAGS=''; \
 412                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 413         fi; \
 414         $(LINK_SO_SHLIB_UNPACKED)
 415 link_app.svr3:
 416         @$(DETECT_GNU_LD) && $(DO_GNU_APP); \
 417         $(LINK_APP)
 418
 419 # UnixWare 7 and OpenUNIX 8 native compilers used
 420 link_dso.svr5:
 421         @ if $(DETECT_GNU_LD); then \
 422                 $(DO_GNU_SO_NOCALC); \
 423         else \
 424                 SHARE_FLAG='-G'; \
 425                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 426                 SHLIB=lib$(LIBNAME).so; \
 427                 SHLIB_SUFFIX=; \
 428                 ALLSYMSFLAGS=''; \
 429                 NOALLSYMSFLAGS=''; \
 430                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SUFFIX"; \
 431         fi; \
 432         $(LINK_SO_DSO)
 433 link_shlib.svr5:
 434         @ if $(DETECT_GNU_LD); then \
 435                 $(DO_GNU_SO); \
 436         else \
 437                 $(CALC_VERSIONS); \
 438                 SHARE_FLAG='-G'; \
 439                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 440                 SHLIB=lib$(LIBNAME).so; \
 441                 SHLIB_SUFFIX=; \
 442                 ALLSYMSFLAGS=''; \
 443                 NOALLSYMSFLAGS=''; \
 444                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 445         fi; \
 446         $(LINK_SO_SHLIB_UNPACKED)
 447 link_app.svr5:
 448         @$(DETECT_GNU_LD) && $(DO_GNU_APP); \
 449         $(LINK_APP)
 450
 451 link_dso.irix:
 452         @ if $(DETECT_GNU_LD); then \
 453                 $(DO_GNU_SO_NOCALC); \
 454         else \
 455                 SHLIB=lib$(LIBNAME).so; \
 456                 SHLIB_SUFFIX=; \
 457                 MINUSWL=""; \
 458                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSWL="-Wl,"; \
 459                 ALLSYMSFLAGS="$${MINUSWL}-all"; \
 460                 NOALLSYMSFLAGS="$${MINUSWL}-none"; \
 461                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SUFFIX,-B,symbolic"; \
 462         fi; \
 463         $(LINK_SO_DSO)
 464 link_shlib.irix:
 465         @ if $(DETECT_GNU_LD); then \
 466                 $(DO_GNU_SO); \
 467         else \
 468                 $(CALC_VERSIONS); \
 469                 SHLIB=lib$(LIBNAME).so; \
 470                 SHLIB_SUFFIX=; \
 471                 MINUSWL=""; \
 472                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSWL="-Wl,"; \
 473                 ALLSYMSFLAGS="$${MINUSWL}-all"; \
 474                 NOALLSYMSFLAGS="$${MINUSWL}-none"; \
 475                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,-B,symbolic"; \
 476         fi; \
 477         $(LINK_SO_SHLIB)
 478 link_app.irix:
 479         @LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,-rpath,$(LIBRPATH)"; \
 480         $(LINK_APP)
 481
 482 # 32-bit PA-RISC HP-UX embeds the -L pathname of libs we link with, so
 483 # we compensate for it with +cdp ../: and +cdp ./:. Yes, these rewrite
 484 # rules imply that we can only link one level down in catalog structure,
 485 # but that's what takes place for the moment of this writing. +cdp option
 486 # was introduced in HP-UX 11.x and applies in 32-bit PA-RISC link
 487 # editor context only [it's simply ignored in other cases, which are all
 488 # ELFs by the way].
 489 #
 490 link_dso.hpux:
 491         @if $(DETECT_GNU_LD); then $(DO_GNU_SO_NOCALC); else \
 492         SHLIB=lib$(LIBNAME).sl; \
 493         expr "$(CFLAGS)" : '.*DSO_DLFCN' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 494         SHLIB_SUFFIX=; \
 495         ALLSYMSFLAGS='-Wl,-Fl'; \
 496         NOALLSYMSFLAGS=''; \
 497         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 498         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SUFFIX,+cdp,../:,+cdp,./:"; \
 499         fi; \
 500         rm -f $$SHLIB$$SHLIB_SUFFIX || :; \
 501         $(LINK_SO_DSO) && chmod a=rx $$SHLIB$$SHLIB_SUFFIX
 502 link_shlib.hpux:
 503         @if $(DETECT_GNU_LD); then $(DO_GNU_SO); else \
 504         $(CALC_VERSIONS); \
 505         SHLIB=lib$(LIBNAME).sl; \
 506         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 507         SHLIB_SUFFIX=; \
 508         ALLSYMSFLAGS='-Wl,-Fl'; \
 509         NOALLSYMSFLAGS=''; \
 510         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 511         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,+cdp,../:,+cdp,./:"; \
 512         fi; \
 513         rm -f $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX || :; \
 514         $(LINK_SO_SHLIB) && chmod a=rx $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX
 515 link_app.hpux:
 516         @if $(DETECT_GNU_LD); then $(DO_GNU_APP); else \
 517         LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,+s,+cdp,../:,+cdp,./:,+b,$(LIBRPATH)"; \
 518         fi; \
 519         $(LINK_APP)
 520
 521 link_dso.aix:
 522         @OBJECT_MODE=`expr "x$(SHARED_LDFLAGS)" : 'x\-[a-z]*\(64\)'` || :; \
 523         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 524         SHLIB=lib$(LIBNAME).so; \
 525         SHLIB_SUFFIX=; \
 526         ALLSYMSFLAGS=''; \
 527         NOALLSYMSFLAGS=''; \
 528         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-bexpall,-bnolibpath,-bM:SRE'; \
 529         $(LINK_SO_DSO);
 530 link_shlib.aix:
 531         @ $(CALC_VERSIONS); \
 532         OBJECT_MODE=`expr "x$(SHARED_LDFLAGS)" : 'x\-[a-z]*\(64\)'` || : ; \
 533         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 534         SHLIB=lib$(LIBNAME).so; \
 535         SHLIB_SUFFIX=; \
 536         ALLSYMSFLAGS='-bnogc'; \
 537         NOALLSYMSFLAGS=''; \
 538         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-bexpall,-bnolibpath,-bM:SRE'; \
 539         $(LINK_SO_SHLIB_VIA_O)
 540 link_app.aix:
 541         LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,-brtl,-blibpath:$(LIBRPATH):$${LIBPATH:-/usr/lib:/lib}"; \
 542         $(LINK_APP)
 543
 544
 545 # Targets to build symbolic links when needed
 546 symlink.gnu symlink.solaris symlink.svr3 symlink.svr5 symlink.irix \
 547 symlink.aix:
 548         @ $(CALC_VERSIONS); \
 549         SHLIB=lib$(LIBNAME).so; \
 550         $(SYMLINK_SO)
 551 symlink.darwin:
 552         @ $(CALC_VERSIONS); \
 553         SHLIB=lib$(LIBNAME); \
 554         SHLIB_SUFFIX=.dylib; \
 555         $(SYMLINK_SO)
 556 symlink.hpux:
 557         @ $(CALC_VERSIONS); \
 558         SHLIB=lib$(LIBNAME).sl; \
 559         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 560         $(SYMLINK_SO)
 561 # The following lines means those specific architectures do no symlinks
 562 symlink.cygwin symlink.alpha-osf1 symlink.tru64 symlink.tru64-rpath:
 563
 564 # Compatibility targets
 565 link_dso.bsd-gcc-shared link_dso.linux-shared link_dso.gnu-shared: link_dso.gnu
 566 link_shlib.bsd-gcc-shared link_shlib.gnu-shared: link_shlib.gnu
 567 link_app.bsd-gcc-shared link_app.linux-shared link_app.gnu-shared: link_app.gnu
 568 symlink.bsd-gcc-shared symlink.bsd-shared symlink.linux-shared symlink.gnu-shared: symlink.gnu
 569 link_dso.bsd-shared: link_dso.bsd
 570 link_shlib.bsd-shared: link_shlib.bsd
 571 link_app.bsd-shared: link_app.bsd
 572 link_dso.darwin-shared: link_dso.darwin
 573 link_shlib.darwin-shared: link_shlib.darwin
 574 link_app.darwin-shared: link_app.darwin
 575 symlink.darwin-shared: symlink.darwin
 576 link_dso.cygwin-shared: link_dso.cygwin
 577 link_shlib.cygwin-shared: link_shlib.cygwin
 578 link_app.cygwin-shared: link_app.cygwin
 579 symlink.cygwin-shared: symlink.cygwin
 580 link_dso.alpha-osf1-shared: link_dso.alpha-osf1
 581 link_shlib.alpha-osf1-shared: link_shlib.alpha-osf1
 582 link_app.alpha-osf1-shared: link_app.alpha-osf1
 583 symlink.alpha-osf1-shared: symlink.alpha-osf1
 584 link_dso.tru64-shared: link_dso.tru64
 585 link_shlib.tru64-shared: link_shlib.tru64
 586 link_app.tru64-shared: link_app.tru64
 587 symlink.tru64-shared: symlink.tru64
 588 link_dso.tru64-shared-rpath: link_dso.tru64-rpath
 589 link_shlib.tru64-shared-rpath: link_shlib.tru64-rpath
 590 link_app.tru64-shared-rpath: link_app.tru64-rpath
 591 symlink.tru64-shared-rpath: symlink.tru64-rpath
 592 link_dso.solaris-shared: link_dso.solaris
 593 link_shlib.solaris-shared: link_shlib.solaris
 594 link_app.solaris-shared: link_app.solaris
 595 symlink.solaris-shared: symlink.solaris
 596 link_dso.svr3-shared: link_dso.svr3
 597 link_shlib.svr3-shared: link_shlib.svr3
 598 link_app.svr3-shared: link_app.svr3
 599 symlink.svr3-shared: symlink.svr3
 600 link_dso.svr5-shared: link_dso.svr5
 601 link_shlib.svr5-shared: link_shlib.svr5
 602 link_app.svr5-shared: link_app.svr5
 603 symlink.svr5-shared: symlink.svr5
 604 link_dso.irix-shared: link_dso.irix
 605 link_shlib.irix-shared: link_shlib.irix
 606 link_app.irix-shared: link_app.irix
 607 symlink.irix-shared: symlink.irix
 608 link_dso.hpux-shared: link_dso.hpux
 609 link_shlib.hpux-shared: link_shlib.hpux
 610 link_app.hpux-shared: link_app.hpux
 611 symlink.hpux-shared: symlink.hpux
 612 link_dso.aix-shared: link_dso.aix
 613 link_shlib.aix-shared: link_shlib.aix
 614 link_app.aix-shared: link_app.aix
 615 symlink.aix-shared: symlink.aix