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=$(SHARED_LDFLAG)
  16
  17 RC=windres
  18 # SHARED_RCFLAGS are flags used with windres, i.e. when build for Cygwin
  19 # or Mingw.
  20 SHARED_RCFLAGS=$(SHARED_RCFLAG)
  21
  22 NM=nm
  23
  24 # LIBNAME contains just the name of the library, without prefix ("lib"
  25 # on Unix, "cyg" for certain forms under Cygwin...) or suffix (.a, .so,
  26 # .dll, ...).  This one MUST have a value when using this makefile to
  27 # build shared libraries.
  28 # For example, to build libfoo.so, you need to do the following:
  29 #LIBNAME=foo
  30 LIBNAME=
  31
  32 # APPNAME contains just the name of the application, without suffix (""
  33 # on Unix, ".exe" on Windows, ...).  This one MUST have a value when using
  34 # this makefile to build applications.
  35 # For example, to build foo, you need to do the following:
  36 #APPNAME=foo
  37 APPNAME=
  38
  39 # DSTDIR is the directory where the built file should end up in.
  40 DSTDIR=.
  41
  42 # SRCDIR is the top directory of the source tree.
  43 SRCDIR=.
  44
  45 # OBJECTS contains all the object files to link together into the application.
  46 # This must contain at least one object file.
  47 #OBJECTS=foo.o
  48 OBJECTS=
  49
  50 # LIBEXTRAS contains extra modules to link together with the library.
  51 # For example, if a second library, say libbar.a needs to be linked into
  52 # libfoo.so, you need to do the following:
  53 #LIBEXTRAS=libbar.a
  54 # Note that this MUST be used when using the link_dso targets, to hold the
  55 # names of all object files that go into the target shared object.
  56 LIBEXTRAS=
  57
  58 # LIBVERSION contains the current version of the library.
  59 # For example, to build libfoo.so.1.2, you need to do the following:
  60 #LIBVERSION=1.2
  61 LIBVERSION=
  62
  63 # LIBCOMPATVERSIONS contains the compatibility versions (a list) of
  64 # the library.  They MUST be in decreasing order.
  65 # For example, if libfoo.so.1.2.1 is backward compatible with libfoo.so.1.2
  66 # and libfoo.so.1, you need to do the following:
  67 #LIBCOMPATVERSIONS=1.2 1
  68 # Note that on systems that use sonames, the last number will appear as
  69 # part of it.
  70 # It's also possible, for systems that support it (Tru64, for example),
  71 # to add extra compatibility info with more precision, by adding a second
  72 # list of versions, separated from the first with a semicolon, like this:
  73 #LIBCOMPATVERSIONS=1.2 1;1.2.0 1.1.2 1.1.1 1.1.0 1.0.0
  74 LIBCOMPATVERSIONS=
  75
  76 # LIBDEPS contains all the flags necessary to cover all necessary
  77 # dependencies to other libraries.
  78 LIBDEPS=
  79
  80 #------------------------------------------------------------------------------
  81 # The rest is private to this makefile.
  82
  83 SET_X=:
  84 #SET_X=set -x
  85
  86 top:
  87         echo "Trying to use this makefile interactively?  Don't."
  88
  89 CALC_VERSIONS=  \
  90         SHLIB_COMPAT=; SHLIB_SOVER=; \
  91         if [ -n "$(LIBVERSION)$(LIBCOMPATVERSIONS)" ]; then \
  92                 prev=""; \
  93                 for v in `echo "$(LIBVERSION) $(LIBCOMPATVERSIONS)" | cut -d';' -f1`; do \
  94                         SHLIB_SOVER_NODOT=$$v; \
  95                         SHLIB_SOVER=.$$v; \
  96                         if [ -n "$$prev" ]; then \
  97                                 SHLIB_COMPAT="$$SHLIB_COMPAT .$$prev"; \
  98                         fi; \
  99                         prev=$$v; \
 100                 done; \
 101         fi
 102
 103 LINK_APP=       \
 104   ( $(SET_X);   \
 105     LIBDEPS="$${LIBDEPS:-$(LIBDEPS)}"; \
 106     LDCMD="$${LDCMD:-$(CC)}"; LDFLAGS="$${LDFLAGS:-$(CFLAGS) $(LDFLAGS)}"; \
 107     LIBPATH=`for x in $$LIBDEPS; do echo $$x; done | sed -e 's/^ *-L//;t' -e d | uniq`; \
 108     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
 109     echo LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 110         $${LDCMD} $${LDFLAGS} -o $${APPNAME:=$(APPNAME)} $(OBJECTS) $${LIBDEPS}; \
 111     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 112     $${LDCMD} $${LDFLAGS} -o $${APPNAME:=$(APPNAME)} $(OBJECTS) $${LIBDEPS} )
 113
 114 LINK_SO=        \
 115   ( $(SET_X);   \
 116     LIBDEPS="$${LIBDEPS:-$(LIBDEPS)}"; \
 117     SHAREDCMD="$${SHAREDCMD:-$(CC)}"; \
 118     SHAREDFLAGS="$${SHAREDFLAGS:-$(CFLAGS) $(SHARED_LDFLAGS)}"; \
 119     LIBPATH=`for x in $$LIBDEPS; do echo $$x; done | sed -e 's/^ *-L//;t' -e d | uniq`; \
 120     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
 121     echo LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 122          $${SHAREDCMD} $${SHAREDFLAGS} \
 123              -o $(DSTDIR)/$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX \
 124              $$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS; \
 125     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
 126     $${SHAREDCMD} $${SHAREDFLAGS} \
 127         -o $(DSTDIR)/$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX \
 128         $$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS \
 129   ) && $(SYMLINK_SO)
 130
 131 SYMLINK_SO=     \
 132         if [ -n "$$INHIBIT_SYMLINKS" ]; then :; else \
 133                 prev=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 134                 if [ -n "$$SHLIB_COMPAT" ]; then \
 135                         for x in $$SHLIB_COMPAT; do \
 136                                 ( $(SET_X); rm -f $(DSTDIR)/$$SHLIB$$x$$SHLIB_SUFFIX; \
 137                                   ln -s $$prev $(DSTDIR)/$$SHLIB$$x$$SHLIB_SUFFIX ); \
 138                                 prev=$$SHLIB$$x$$SHLIB_SUFFIX; \
 139                         done; \
 140                 fi; \
 141                 if [ -n "$$SHLIB_SOVER" ]; then \
 142                         ( $(SET_X); rm -f $(DSTDIR)/$$SHLIB$$SHLIB_SUFFIX; \
 143                           ln -s $$prev $(DSTDIR)/$$SHLIB$$SHLIB_SUFFIX ); \
 144                 fi; \
 145         fi
 146
 147 LINK_SO_SHLIB=  SHOBJECTS="$(DSTDIR)/lib$(LIBNAME).a $(LIBEXTRAS)"; $(LINK_SO)
 148 LINK_SO_DSO=    INHIBIT_SYMLINKS=yes; SHOBJECTS="$(LIBEXTRAS)"; $(LINK_SO)
 149
 150 LINK_SO_SHLIB_VIA_O=    \
 151   SHOBJECTS=$(DSTDIR)/lib$(LIBNAME).o; \
 152   ALL=$$ALLSYMSFLAGS; ALLSYMSFLAGS=; NOALLSYMSFLAGS=; \
 153   ( echo ld $(LDFLAGS) -r -o $$SHOBJECTS $$ALL lib$(LIBNAME).a $(LIBEXTRAS); \
 154     ld $(LDFLAGS) -r -o $$SHOBJECTS $$ALL $(DSTDIR)/lib$(LIBNAME).a $(LIBEXTRAS) ); \
 155   $(LINK_SO) && ( echo rm -f $$SHOBJECTS; rm -f $$SHOBJECTS )
 156
 157 LINK_SO_SHLIB_UNPACKED= \
 158   UNPACKDIR=link_tmp.$$$$; rm -rf $$UNPACKDIR; mkdir $$UNPACKDIR; \
 159   (cd $$UNPACKDIR; ar x ../$(DSTDIR)/lib$(LIBNAME).a) && \
 160   ([ -z "$(LIBEXTRAS)" ] || cp $(LIBEXTRAS) $$UNPACKDIR) && \
 161   SHOBJECTS=$$UNPACKDIR/*.o; \
 162   $(LINK_SO) && rm -rf $$UNPACKDIR
 163
 164 DETECT_GNU_LD=($(CC) -Wl,-V /dev/null 2>&1 | grep '^GNU ld' )>/dev/null
 165
 166 DO_GNU_SO_COMMON=\
 167         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"
 168 DO_GNU_DSO=\
 169         SHLIB=$(LIBNAME).so; \
 170         SHLIB_SOVER=; \
 171         SHLIB_SUFFIX=; \
 172         $(DO_GNU_SO_COMMON)
 173 DO_GNU_SO=\
 174         $(CALC_VERSIONS); \
 175         SHLIB=lib$(LIBNAME).so; \
 176         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 177         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 178         $(DO_GNU_SO_COMMON)
 179 DO_GNU_APP=LDFLAGS="$(CFLAGS) $(LDFLAGS)"
 180
 181 #This is rather special.  It's a special target with which one can link
 182 #applications without bothering with any features that have anything to
 183 #do with shared libraries, for example when linking against static
 184 #libraries.  It's mostly here to avoid a lot of conditionals everywhere
 185 #else...
 186 link_app.:
 187         $(LINK_APP)
 188
 189 link_dso.gnu:
 190         @ $(DO_GNU_DSO); $(LINK_SO_DSO)
 191 link_shlib.gnu:
 192         @ $(DO_GNU_SO); $(LINK_SO_SHLIB)
 193 link_app.gnu:
 194         @ $(DO_GNU_APP); $(LINK_APP)
 195
 196 link_shlib.linux-shared:
 197         @$(PERL) $(SRCDIR)/util/mkdef.pl $(LIBNAME) linux >$(LIBNAME).map; \
 198         $(DO_GNU_SO); \
 199         ALLSYMSFLAGS='-Wl,--whole-archive,--version-script=$(LIBNAME).map'; \
 200         $(LINK_SO_SHLIB)
 201
 202 link_dso.bsd:
 203         @if $(DETECT_GNU_LD); then $(DO_GNU_DSO); else \
 204         SHLIB=$(LIBNAME).so; \
 205         SHLIB_SUFFIX=; \
 206         LIBDEPS=" "; \
 207         ALLSYMSFLAGS=; \
 208         NOALLSYMSFLAGS=; \
 209         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 210         fi; $(LINK_SO_DSO)
 211 link_shlib.bsd:
 212         @if $(DETECT_GNU_LD); then $(DO_GNU_SO); else \
 213         $(CALC_VERSIONS); \
 214         SHLIB=lib$(LIBNAME).so; \
 215         SHLIB_SUFFIX=; \
 216         LIBDEPS=" "; \
 217         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 218         NOALLSYMSFLAGS=; \
 219         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 220         fi; $(LINK_SO_SHLIB)
 221 link_app.bsd:
 222         @if $(DETECT_GNU_LD); then $(DO_GNU_APP); else \
 223         LDFLAGS="$(CFLAGS) $(LDFLAGS)"; \
 224         fi; $(LINK_APP)
 225
 226 # For Darwin AKA Mac OS/X (dyld)
 227 # Originally link_dso.darwin produced .so, because it was hard-coded
 228 # in dso_dlfcn module. At later point dso_dlfcn switched to .dylib
 229 # extension in order to allow for run-time linking with vendor-
 230 # supplied shared libraries such as libz, so that link_dso.darwin had
 231 # to be harmonized with it. This caused minor controversy, because
 232 # it was believed that dlopen can't be used to dynamically load
 233 # .dylib-s, only so called bundle modules (ones linked with -bundle
 234 # flag). The belief seems to be originating from pre-10.4 release,
 235 # where dlfcn functionality was emulated by dlcompat add-on. In
 236 # 10.4 dlopen was rewritten as native part of dyld and is documented
 237 # to be capable of loading both dynamic libraries and bundles. In
 238 # order to provide compatibility with pre-10.4 dlopen, modules are
 239 # linked with -bundle flag, which makes .dylib extension misleading.
 240 # It works, because dlopen is [and always was] extension-agnostic.
 241 # Alternative to this heuristic approach is to develop specific
 242 # MacOS X dso module relying on whichever "native" dyld interface.
 243 link_dso.darwin:
 244         @ SHLIB=$(LIBNAME); \
 245         SHLIB_SUFFIX=.dylib; \
 246         ALLSYMSFLAGS=''; \
 247         NOALLSYMSFLAGS=''; \
 248         SHAREDFLAGS="$(CFLAGS) `echo $(SHARED_LDFLAGS) | sed s/dynamiclib/bundle/`"; \
 249         $(LINK_SO_DSO)
 250 link_shlib.darwin:
 251         @ $(CALC_VERSIONS); \
 252         SHLIB=lib$(LIBNAME); \
 253         SHLIB_SUFFIX=.dylib; \
 254         ALLSYMSFLAGS='-all_load'; \
 255         NOALLSYMSFLAGS=''; \
 256         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \
 257         if [ -n "$(LIBVERSION)" ]; then \
 258                 SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \
 259         fi; \
 260         if [ -n "$$SHLIB_SOVER_NODOT" ]; then \
 261                 SHAREDFLAGS="$$SHAREDFLAGS -compatibility_version $$SHLIB_SOVER_NODOT"; \
 262         fi; \
 263         SHAREDFLAGS="$$SHAREDFLAGS -install_name $(INSTALLTOP)/$(LIBDIR)/$$SHLIB$(SHLIB_EXT)"; \
 264         $(LINK_SO_SHLIB)
 265 link_app.darwin:        # is there run-path on darwin?
 266         $(LINK_APP)
 267
 268 link_dso.cygwin:
 269         @SHLIB=$(LIBNAME); \
 270         SHLIB_SUFFIX=.dll; \
 271         ALLSYMSFLAGS=''; \
 272         NOALLSYMSFLAGS=''; \
 273         base=-Wl,--enable-auto-image-base; \
 274         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base -Wl,-Bsymbolic"; \
 275         $(LINK_SO_DSO)
 276 link_shlib.cygwin:
 277         @ $(CALC_VERSIONS); \
 278         INHIBIT_SYMLINKS=yes; \
 279         SHLIB=cyg$(LIBNAME); SHLIB_SOVER=-$(LIBVERSION); SHLIB_SUFFIX=.dll; \
 280         dll_name=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 281         echo "$(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name |" \
 282                      "$(RC) $(SHARED_RCFLAGS) -o rc.o"; \
 283         $(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name | \
 284                 $(RC) $(SHARED_RCFLAGS) -o rc.o; \
 285         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 286         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 287         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,--enable-auto-image-base -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a rc.o"; \
 288         $(LINK_SO_SHLIB) || exit 1; \
 289         rm rc.o
 290 link_app.cygwin:
 291         $(LINK_APP)
 292
 293 # link_dso.mingw-shared and link_app.mingw-shared are mapped to the
 294 # corresponding cygwin targets, as they do the exact same thing.
 295 link_shlib.mingw:
 296         @ $(CALC_VERSIONS); \
 297         INHIBIT_SYMLINKS=yes; \
 298         arch=; \
 299         if expr $(PLATFORM) : mingw64 > /dev/null; then arch=-x64; fi; \
 300         sover=`echo $(LIBVERSION) | sed -e 's/\./_/g'` ; \
 301         SHLIB=lib$(LIBNAME); \
 302         SHLIB_SOVER=-$$sover$$arch; \
 303         SHLIB_SUFFIX=.dll; \
 304         dll_name=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 305         $(PERL) $(SRCDIR)/util/mkdef.pl 32 $(LIBNAME) \
 306                 | sed -e 's|^\(LIBRARY  *\)$(LIBNAME)32|\1'"$$dll_name"'|' \
 307                 > $(LIBNAME).def; \
 308         echo "$(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name |" \
 309                 "$(RC) $(SHARED_RCFLAGS) -o rc.o"; \
 310         $(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name | \
 311                 $(RC) $(SHARED_RCFLAGS) -o rc.o; \
 312         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 313         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 314         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a $(LIBNAME).def rc.o"; \
 315         $(LINK_SO_SHLIB) || exit 1; \
 316         rm $(LIBNAME).def rc.o
 317
 318 link_dso.alpha-osf1:
 319         @ if $(DETECT_GNU_LD); then \
 320                 $(DO_GNU_DSO); \
 321         else \
 322                 SHLIB=$(LIBNAME).so; \
 323                 SHLIB_SUFFIX=; \
 324                 ALLSYMSFLAGS=''; \
 325                 NOALLSYMSFLAGS=''; \
 326                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-B,symbolic"; \
 327         fi; \
 328         $(LINK_SO_DSO)
 329 link_shlib.alpha-osf1:
 330         @ if $(DETECT_GNU_LD); then \
 331                 $(DO_GNU_SO); \
 332         else \
 333                 SHLIB=lib$(LIBNAME).so; \
 334                 SHLIB_SUFFIX=; \
 335                 SHLIB_HIST=`echo "$(LIBCOMPATVERSIONS)" | cut -d';' -f2 | sed -e 's/ */:/'`; \
 336                 if [ -n "$$SHLIB_HIST" ]; then \
 337                         SHLIB_HIST="$${SHLIB_HIST}:$(LIBVERSION)"; \
 338                 else \
 339                         SHLIB_HIST="$(LIBVERSION)"; \
 340                 fi; \
 341                 SHLIB_SOVER=; \
 342                 ALLSYMSFLAGS='-all'; \
 343                 NOALLSYMSFLAGS='-none'; \
 344                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-B,symbolic"; \
 345                 if [ -n "$$SHLIB_HIST" ]; then \
 346                         SHAREDFLAGS="$$SHAREDFLAGS -set_version $$SHLIB_HIST"; \
 347                 fi; \
 348         fi; \
 349         $(LINK_SO_SHLIB)
 350 link_app.alpha-osf1:
 351         @if $(DETECT_GNU_LD); then \
 352                 $(DO_GNU_APP); \
 353         else \
 354                 LDFLAGS="$(CFLAGS) $(LDFLAGS)"; \
 355         fi; \
 356         $(LINK_APP)
 357
 358 link_dso.solaris:
 359         @ if $(DETECT_GNU_LD); then \
 360                 $(DO_GNU_DSO); \
 361         else \
 362                 $(CALC_VERSIONS); \
 363                 SHLIB=$(LIBNAME).so; \
 364                 SHLIB_SUFFIX=; \
 365                 ALLSYMSFLAGS=""; \
 366                 NOALLSYMSFLAGS=""; \
 367                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 368         fi; \
 369         $(LINK_SO_DSO)
 370 link_shlib.solaris:
 371         @ if $(DETECT_GNU_LD); then \
 372                 $(DO_GNU_SO); \
 373         else \
 374                 $(CALC_VERSIONS); \
 375                 SHLIB=lib$(LIBNAME).so; \
 376                 SHLIB_SUFFIX=;\
 377                 $(PERL) $(SRCDIR)/util/mkdef.pl $(LIBNAME) linux >$(LIBNAME).map; \
 378                 ALLSYMSFLAGS="-Wl,-z,allextract,-M,$(LIBNAME).map"; \
 379                 NOALLSYMSFLAGS="-Wl,-z,defaultextract"; \
 380                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 381         fi; \
 382         $(LINK_SO_SHLIB)
 383 link_app.solaris:
 384         @ if $(DETECT_GNU_LD); then \
 385                 $(DO_GNU_APP); \
 386         else \
 387                 LDFLAGS="$(CFLAGS) $(LDFLAGS)"; \
 388         fi; \
 389         $(LINK_APP)
 390
 391 # OpenServer 5 native compilers used
 392 link_dso.svr3:
 393         @ if $(DETECT_GNU_LD); then \
 394                 $(DO_GNU_DSO); \
 395         else \
 396                 $(CALC_VERSIONS); \
 397                 SHLIB=$(LIBNAME).so; \
 398                 SHLIB_SUFFIX=; \
 399                 ALLSYMSFLAGS=''; \
 400                 NOALLSYMSFLAGS=''; \
 401                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SUFFIX"; \
 402         fi; \
 403         $(LINK_SO_DSO)
 404 link_shlib.svr3:
 405         @ if $(DETECT_GNU_LD); then \
 406                 $(DO_GNU_SO); \
 407         else \
 408                 $(CALC_VERSIONS); \
 409                 SHLIB=lib$(LIBNAME).so; \
 410                 SHLIB_SUFFIX=; \
 411                 ALLSYMSFLAGS=''; \
 412                 NOALLSYMSFLAGS=''; \
 413                 SHAREDFLAGS="$(CFLAGS) -G -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 414         fi; \
 415         $(LINK_SO_SHLIB_UNPACKED)
 416 link_app.svr3:
 417         @$(DETECT_GNU_LD) && $(DO_GNU_APP); \
 418         $(LINK_APP)
 419
 420 # UnixWare 7 and OpenUNIX 8 native compilers used
 421 link_dso.svr5:
 422         @ if $(DETECT_GNU_LD); then \
 423                 $(DO_GNU_DSO); \
 424         else \
 425                 SHARE_FLAG='-G'; \
 426                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 427                 SHLIB=$(LIBNAME).so; \
 428                 SHLIB_SUFFIX=; \
 429                 ALLSYMSFLAGS=''; \
 430                 NOALLSYMSFLAGS=''; \
 431                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SUFFIX"; \
 432         fi; \
 433         $(LINK_SO_DSO)
 434 link_shlib.svr5:
 435         @ if $(DETECT_GNU_LD); then \
 436                 $(DO_GNU_SO); \
 437         else \
 438                 $(CALC_VERSIONS); \
 439                 SHARE_FLAG='-G'; \
 440                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && SHARE_FLAG='-shared'; \
 441                 SHLIB=lib$(LIBNAME).so; \
 442                 SHLIB_SUFFIX=; \
 443                 ALLSYMSFLAGS=''; \
 444                 NOALLSYMSFLAGS=''; \
 445                 SHAREDFLAGS="$(CFLAGS) $${SHARE_FLAG} -h $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"; \
 446         fi; \
 447         $(LINK_SO_SHLIB_UNPACKED)
 448 link_app.svr5:
 449         @$(DETECT_GNU_LD) && $(DO_GNU_APP); \
 450         $(LINK_APP)
 451
 452 link_dso.irix:
 453         @ if $(DETECT_GNU_LD); then \
 454                 $(DO_GNU_DSO); \
 455         else \
 456                 SHLIB=$(LIBNAME).so; \
 457                 SHLIB_SUFFIX=; \
 458                 ALLSYMSFLAGS=""; \
 459                 NOALLSYMSFLAGS=""; \
 460                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SUFFIX,-B,symbolic"; \
 461         fi; \
 462         $(LINK_SO_DSO)
 463 link_shlib.irix:
 464         @ if $(DETECT_GNU_LD); then \
 465                 $(DO_GNU_SO); \
 466         else \
 467                 $(CALC_VERSIONS); \
 468                 SHLIB=lib$(LIBNAME).so; \
 469                 SHLIB_SUFFIX=; \
 470                 MINUSWL=""; \
 471                 ($(CC) -v 2>&1 | grep gcc) > /dev/null && MINUSWL="-Wl,"; \
 472                 ALLSYMSFLAGS="$${MINUSWL}-all"; \
 473                 NOALLSYMSFLAGS="$${MINUSWL}-none"; \
 474                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-soname,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,-B,symbolic"; \
 475         fi; \
 476         $(LINK_SO_SHLIB)
 477 link_app.irix:
 478         @LDFLAGS="$(CFLAGS) $(LDFLAGS)"; \
 479         $(LINK_APP)
 480
 481 # 32-bit PA-RISC HP-UX embeds the -L pathname of libs we link with, so
 482 # we compensate for it with +cdp ../: and +cdp ./:. Yes, these rewrite
 483 # rules imply that we can only link one level down in catalog structure,
 484 # but that's what takes place for the moment of this writing. +cdp option
 485 # was introduced in HP-UX 11.x and applies in 32-bit PA-RISC link
 486 # editor context only [it's simply ignored in other cases, which are all
 487 # ELFs by the way].
 488 #
 489 link_dso.hpux:
 490         @if $(DETECT_GNU_LD); then $(DO_GNU_DSO); else \
 491         SHLIB=$(LIBNAME).sl; \
 492         expr "$(CFLAGS)" : '.*DSO_DLFCN' > /dev/null && SHLIB=$(LIBNAME).so; \
 493         SHLIB_SUFFIX=; \
 494         ALLSYMSFLAGS=''; \
 495         NOALLSYMSFLAGS=''; \
 496         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 497         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SUFFIX,+cdp,../:,+cdp,./:"; \
 498         fi; \
 499         rm -f $(DSTDIR)/$$SHLIB$$SHLIB_SUFFIX || :; \
 500         $(LINK_SO_DSO) && chmod a=rx $(DSTDIR)/$$SHLIB$$SHLIB_SUFFIX
 501 link_shlib.hpux:
 502         @if $(DETECT_GNU_LD); then $(DO_GNU_SO); else \
 503         $(CALC_VERSIONS); \
 504         SHLIB=lib$(LIBNAME).sl; \
 505         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 506         SHLIB_SUFFIX=; \
 507         ALLSYMSFLAGS='-Wl,-Fl'; \
 508         NOALLSYMSFLAGS=''; \
 509         expr $(PLATFORM) : 'hpux64' > /dev/null && ALLSYMSFLAGS='-Wl,+forceload'; \
 510         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-B,symbolic,+vnocompatwarnings,-z,+s,+h,$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX,+cdp,../:,+cdp,./:"; \
 511         fi; \
 512         rm -f $(DSTDIR)/$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX || :; \
 513         $(LINK_SO_SHLIB) && chmod a=rx $(DSTDIR)/$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX
 514 link_app.hpux:
 515         @if $(DETECT_GNU_LD); then $(DO_GNU_APP); else \
 516         LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,+s,+cdp,../:,+cdp,./:"; \
 517         fi; \
 518         $(LINK_APP)
 519
 520 link_dso.aix:
 521         @OBJECT_MODE=`expr "x$(SHARED_LDFLAGS)" : 'x\-[a-z]*\(64\)'` || :; \
 522         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 523         SHLIB=$(LIBNAME).so; \
 524         SHLIB_SUFFIX=; \
 525         ALLSYMSFLAGS=''; \
 526         NOALLSYMSFLAGS=''; \
 527         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-bexpall,-bnolibpath,-bM:SRE'; \
 528         rm -f $(DSTDIR)/$$SHLIB$$SHLIB_SOVER 2>&1 > /dev/null ; \
 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=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 534         SHLIB=lib$(LIBNAME).so; \
 535         SHLIB_SUFFIX=; \
 536         ALLSYMSFLAGS='-bnogc'; \
 537         NOALLSYMSFLAGS=''; \
 538         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-bexpall,-bnolibpath,-bM:SRE'; \
 539         rm -f $(DSTDIR)/$$SHLIB$$SHLIB_SOVER 2>&1 > /dev/null ; \
 540         $(LINK_SO_SHLIB_VIA_O)
 541 link_app.aix:
 542         LDFLAGS="$(CFLAGS) -Wl,-bsvr4 $(LDFLAGS)"; \
 543         $(LINK_APP)
 544
 545
 546 # Targets to build symbolic links when needed
 547 symlink.gnu symlink.solaris symlink.svr3 symlink.svr5 symlink.irix \
 548 symlink.aix:
 549         @ $(CALC_VERSIONS); \
 550         SHLIB=lib$(LIBNAME).so; \
 551         $(SYMLINK_SO)
 552 symlink.darwin:
 553         @ $(CALC_VERSIONS); \
 554         SHLIB=lib$(LIBNAME); \
 555         SHLIB_SUFFIX=.dylib; \
 556         $(SYMLINK_SO)
 557 symlink.hpux:
 558         @ $(CALC_VERSIONS); \
 559         SHLIB=lib$(LIBNAME).sl; \
 560         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 561         $(SYMLINK_SO)
 562 # The following lines means those specific architectures do no symlinks
 563 symlink.cygwin symlink.alpha-osf1 symlink.tru64 symlink.tru64-rpath:
 564
 565 # Compatibility targets
 566 link_dso.bsd-gcc-shared link_dso.linux-shared link_dso.gnu-shared: link_dso.gnu
 567 link_shlib.bsd-gcc-shared: link_shlib.linux-shared
 568 link_shlib.gnu-shared: link_shlib.gnu
 569 link_app.bsd-gcc-shared link_app.linux-shared link_app.gnu-shared: link_app.gnu
 570 symlink.bsd-gcc-shared symlink.bsd-shared symlink.linux-shared symlink.gnu-shared: symlink.gnu
 571 link_dso.bsd-shared: link_dso.bsd
 572 link_shlib.bsd-shared: link_shlib.bsd
 573 link_app.bsd-shared: link_app.bsd
 574 link_dso.darwin-shared: link_dso.darwin
 575 link_shlib.darwin-shared: link_shlib.darwin
 576 link_app.darwin-shared: link_app.darwin
 577 symlink.darwin-shared: symlink.darwin
 578 link_dso.cygwin-shared: link_dso.cygwin
 579 link_shlib.cygwin-shared: link_shlib.cygwin
 580 link_app.cygwin-shared: link_app.cygwin
 581 symlink.cygwin-shared: symlink.cygwin
 582 link_dso.mingw-shared: link_dso.cygwin
 583 link_shlib.mingw-shared: link_shlib.mingw
 584 link_app.mingw-shared: link_app.cygwin
 585 symlink.mingw-shared: symlink.cygwin
 586 link_dso.alpha-osf1-shared: link_dso.alpha-osf1
 587 link_shlib.alpha-osf1-shared: link_shlib.alpha-osf1
 588 link_app.alpha-osf1-shared: link_app.alpha-osf1
 589 symlink.alpha-osf1-shared: symlink.alpha-osf1
 590 link_dso.tru64-shared: link_dso.tru64
 591 link_shlib.tru64-shared: link_shlib.tru64
 592 link_app.tru64-shared: link_app.tru64
 593 symlink.tru64-shared: symlink.tru64
 594 link_dso.tru64-shared-rpath: link_dso.tru64-rpath
 595 link_shlib.tru64-shared-rpath: link_shlib.tru64-rpath
 596 link_app.tru64-shared-rpath: link_app.tru64-rpath
 597 symlink.tru64-shared-rpath: symlink.tru64-rpath
 598 link_dso.solaris-shared: link_dso.solaris
 599 link_shlib.solaris-shared: link_shlib.solaris
 600 link_app.solaris-shared: link_app.solaris
 601 symlink.solaris-shared: symlink.solaris
 602 link_dso.svr3-shared: link_dso.svr3
 603 link_shlib.svr3-shared: link_shlib.svr3
 604 link_app.svr3-shared: link_app.svr3
 605 symlink.svr3-shared: symlink.svr3
 606 link_dso.svr5-shared: link_dso.svr5
 607 link_shlib.svr5-shared: link_shlib.svr5
 608 link_app.svr5-shared: link_app.svr5
 609 symlink.svr5-shared: symlink.svr5
 610 link_dso.irix-shared: link_dso.irix
 611 link_shlib.irix-shared: link_shlib.irix
 612 link_app.irix-shared: link_app.irix
 613 symlink.irix-shared: symlink.irix
 614 link_dso.hpux-shared: link_dso.hpux
 615 link_shlib.hpux-shared: link_shlib.hpux
 616 link_app.hpux-shared: link_app.hpux
 617 symlink.hpux-shared: symlink.hpux
 618 link_dso.aix-shared: link_dso.aix
 619 link_shlib.aix-shared: link_shlib.aix
 620 link_app.aix-shared: link_app.aix
 621 symlink.aix-shared: symlink.aix