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 $$UNPACKDIR
 162
 163 DETECT_GNU_LD=($(CC) -Wl,-V /dev/null 2>&1 | grep '^GNU ld' )>/dev/null
 164
 165 DO_GNU_SO_COMMON=\
 166         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,-Bsymbolic -Wl,-soname=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX"
 167 DO_GNU_DSO=\
 168         SHLIB=$(LIBNAME).so; \
 169         SHLIB_SOVER=; \
 170         SHLIB_SUFFIX=; \
 171         $(DO_GNU_SO_COMMON)
 172 DO_GNU_SO=\
 173         $(CALC_VERSIONS); \
 174         SHLIB=lib$(LIBNAME).so; \
 175         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 176         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 177         $(DO_GNU_SO_COMMON)
 178 DO_GNU_APP=LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,-rpath,$(LIBRPATH)"
 179
 180 #This is rather special.  It's a special target with which one can link
 181 #applications without bothering with any features that have anything to
 182 #do with shared libraries, for example when linking against static
 183 #libraries.  It's mostly here to avoid a lot of conditionals everywhere
 184 #else...
 185 link_app.:
 186         $(LINK_APP)
 187
 188 link_dso.gnu:
 189         @ $(DO_GNU_DSO); $(LINK_SO_DSO)
 190 link_shlib.gnu:
 191         @ $(DO_GNU_SO); $(LINK_SO_SHLIB)
 192 link_app.gnu:
 193         @ $(DO_GNU_APP); $(LINK_APP)
 194
 195 link_shlib.linux-shared:
 196         @$(PERL) $(SRCDIR)/util/mkdef.pl $(LIBNAME) linux >$(LIBNAME).map; \
 197         $(DO_GNU_SO); \
 198         ALLSYMSFLAGS='-Wl,--whole-archive,--version-script=$(LIBNAME).map'; \
 199         $(LINK_SO_SHLIB)
 200
 201 link_dso.bsd:
 202         @if $(DETECT_GNU_LD); then $(DO_GNU_DSO); else \
 203         SHLIB=$(LIBNAME).so; \
 204         SHLIB_SUFFIX=; \
 205         LIBDEPS=" "; \
 206         ALLSYMSFLAGS=; \
 207         NOALLSYMSFLAGS=; \
 208         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 209         fi; $(LINK_SO_DSO)
 210 link_shlib.bsd:
 211         @if $(DETECT_GNU_LD); then $(DO_GNU_SO); else \
 212         $(CALC_VERSIONS); \
 213         SHLIB=lib$(LIBNAME).so; \
 214         SHLIB_SUFFIX=; \
 215         LIBDEPS=" "; \
 216         ALLSYMSFLAGS="-Wl,-Bforcearchive"; \
 217         NOALLSYMSFLAGS=; \
 218         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -nostdlib"; \
 219         fi; $(LINK_SO_SHLIB)
 220 link_app.bsd:
 221         @if $(DETECT_GNU_LD); then $(DO_GNU_APP); else \
 222         LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,-rpath,$(LIBPATH)"; \
 223         fi; $(LINK_APP)
 224
 225 # For Darwin AKA Mac OS/X (dyld)
 226 # Originally link_dso.darwin produced .so, because it was hard-coded
 227 # in dso_dlfcn module. At later point dso_dlfcn switched to .dylib
 228 # extension in order to allow for run-time linking with vendor-
 229 # supplied shared libraries such as libz, so that link_dso.darwin had
 230 # to be harmonized with it. This caused minor controversy, because
 231 # it was believed that dlopen can't be used to dynamically load
 232 # .dylib-s, only so called bundle modules (ones linked with -bundle
 233 # flag). The belief seems to be originating from pre-10.4 release,
 234 # where dlfcn functionality was emulated by dlcompat add-on. In
 235 # 10.4 dlopen was rewritten as native part of dyld and is documented
 236 # to be capable of loading both dynamic libraries and bundles. In
 237 # order to provide compatibility with pre-10.4 dlopen, modules are
 238 # linked with -bundle flag, which makes .dylib extension misleading.
 239 # It works, because dlopen is [and always was] extension-agnostic.
 240 # Alternative to this heuristic approach is to develop specific
 241 # MacOS X dso module relying on whichever "native" dyld interface.
 242 link_dso.darwin:
 243         @ SHLIB=$(LIBNAME); \
 244         SHLIB_SUFFIX=.dylib; \
 245         ALLSYMSFLAGS=''; \
 246         NOALLSYMSFLAGS=''; \
 247         SHAREDFLAGS="$(CFLAGS) `echo $(SHARED_LDFLAGS) | sed s/dynamiclib/bundle/`"; \
 248         $(LINK_SO_DSO)
 249 link_shlib.darwin:
 250         @ $(CALC_VERSIONS); \
 251         SHLIB=lib$(LIBNAME); \
 252         SHLIB_SUFFIX=.dylib; \
 253         ALLSYMSFLAGS='-all_load'; \
 254         NOALLSYMSFLAGS=''; \
 255         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS)"; \
 256         if [ -n "$(LIBVERSION)" ]; then \
 257                 SHAREDFLAGS="$$SHAREDFLAGS -current_version $(LIBVERSION)"; \
 258         fi; \
 259         if [ -n "$$SHLIB_SOVER_NODOT" ]; then \
 260                 SHAREDFLAGS="$$SHAREDFLAGS -compatibility_version $$SHLIB_SOVER_NODOT"; \
 261         fi; \
 262         SHAREDFLAGS="$$SHAREDFLAGS -install_name $(INSTALLTOP)/$(LIBDIR)/$$SHLIB$(SHLIB_EXT)"; \
 263         $(LINK_SO_SHLIB)
 264 link_app.darwin:        # is there run-path on darwin?
 265         $(LINK_APP)
 266
 267 link_dso.cygwin:
 268         @SHLIB=$(LIBNAME); \
 269         SHLIB_SUFFIX=.dll; \
 270         ALLSYMSFLAGS=''; \
 271         NOALLSYMSFLAGS=''; \
 272         base=-Wl,--enable-auto-image-base; \
 273         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base -Wl,-Bsymbolic"; \
 274         $(LINK_SO_DSO)
 275 link_shlib.cygwin:
 276         @ $(CALC_VERSIONS); \
 277         INHIBIT_SYMLINKS=yes; \
 278         SHLIB=cyg$(LIBNAME); SHLIB_SOVER=-$(LIBVERSION); SHLIB_SUFFIX=.dll; \
 279         dll_name=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 280         echo "$(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name |" \
 281                      "$(CROSS_COMPILE)windres $(SHARED_RCFLAGS) -o rc.o"; \
 282         $(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name | \
 283                 $(CROSS_COMPILE)windres $(SHARED_RCFLAGS) -o rc.o; \
 284         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 285         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 286         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared -Wl,--enable-auto-image-base -Wl,-Bsymbolic -Wl,--out-implib,lib$(LIBNAME).dll.a rc.o"; \
 287         $(LINK_SO_SHLIB) || exit 1; \
 288         rm rc.o
 289 link_app.cygwin:
 290         $(LINK_APP)
 291
 292 # link_dso.mingw-shared and link_app.mingw-shared are mapped to the
 293 # corresponding cygwin targets, as they do the exact same thing.
 294 link_shlib.mingw:
 295         @ $(CALC_VERSIONS); \
 296         INHIBIT_SYMLINKS=yes; \
 297         arch=; \
 298         if expr $(PLATFORM) : mingw64 > /dev/null; then arch=-x64; fi; \
 299         sover=`echo $(LIBVERSION) | sed -e 's/\./_/g'` ; \
 300         SHLIB=lib$(LIBNAME); \
 301         SHLIB_SOVER=-$$sover$$arch; \
 302         SHLIB_SUFFIX=.dll; \
 303         dll_name=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 304         base=; [ $(LIBNAME) = "crypto" -a -n "$(FIPSCANLIB)" ] && base=-Wl,--image-base,0x63000000; \
 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                 "$(CROSS_COMPILE)windres $(SHARED_RCFLAGS) -o rc.o"; \
 310         $(PERL) $(SRCDIR)/util/mkrc.pl $$dll_name | \
 311                 $(CROSS_COMPILE)windres $(SHARED_RCFLAGS) -o rc.o; \
 312         ALLSYMSFLAGS='-Wl,--whole-archive'; \
 313         NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \
 314         SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -shared $$base -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 $$SHLIB_HIST"; \
 347                 fi; \
 348         fi; \
 349         $(LINK_SO_SHLIB)
 350 link_app.alpha-osf1:
 351         @if $(DETECT_GNU_LD); then \
 352                 $(DO_GNU_APP); \
 353         else \
 354                 LDFLAGS="$(CFLAGS) $(LDFLAGS) -rpath $(LIBRPATH)"; \
 355         fi; \
 356         $(LINK_APP)
 357
 358 link_dso.solaris:
 359         @ if $(DETECT_GNU_LD); then \
 360                 $(DO_GNU_DSO); \
 361         else \
 362                 $(CALC_VERSIONS); \
 363                 SHLIB=$(LIBNAME).so; \
 364                 SHLIB_SUFFIX=; \
 365                 ALLSYMSFLAGS=""; \
 366                 NOALLSYMSFLAGS=""; \
 367                 SHAREDFLAGS="$(CFLAGS) $(SHARED_LDFLAGS) -h $$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$$SHLIB_SUFFIX -Wl,-Bsymbolic"; \
 381         fi; \
 382         $(LINK_SO_SHLIB)
 383 link_app.solaris:
 384         @ if $(DETECT_GNU_LD); then \
 385                 $(DO_GNU_APP); \
 386         else \
 387                 LDFLAGS="$(CFLAGS) $(LDFLAGS) -R $(LIBRPATH)"; \
 388         fi; \
 389         $(LINK_APP)
 390
 391 # OpenServer 5 native compilers used
 392 link_dso.svr3:
 393         @ if $(DETECT_GNU_LD); then \
 394                 $(DO_GNU_DSO); \
 395         else \
 396                 $(CALC_VERSIONS); \
 397                 SHLIB=$(LIBNAME).so; \
 398                 SHLIB_SUFFIX=; \
 399                 ALLSYMSFLAGS=''; \
 400                 NOALLSYMSFLAGS=''; \
 401                 SHAREDFLAGS="$(CFLAGS) -G -h $$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) $(LDFLAGS) -Wl,-rpath,$(LIBRPATH)"; \
 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 $$SHLIB$$SHLIB_SUFFIX || :; \
 500         $(LINK_SO_DSO) && chmod a=rx $$SHLIB$$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$$SHLIB_SUFFIX,+cdp,../:,+cdp,./:"; \
 511         fi; \
 512         rm -f $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX || :; \
 513         $(LINK_SO_SHLIB) && chmod a=rx $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX
 514 link_app.hpux:
 515         @if $(DETECT_GNU_LD); then $(DO_GNU_APP); else \
 516         LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,+s,+cdp,../:,+cdp,./:,+b,$(LIBRPATH)"; \
 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         $(LINK_SO_DSO);
 529 link_shlib.aix:
 530         @ $(CALC_VERSIONS); \
 531         OBJECT_MODE=`expr "x$(SHARED_LDFLAGS)" : 'x\-[a-z]*\(64\)'` || : ; \
 532         OBJECT_MODE=$${OBJECT_MODE:-32}; export OBJECT_MODE; \
 533         SHLIB=lib$(LIBNAME).so; \
 534         SHLIB_SUFFIX=; \
 535         ALLSYMSFLAGS='-bnogc'; \
 536         NOALLSYMSFLAGS=''; \
 537         SHAREDFLAGS='$(CFLAGS) $(SHARED_LDFLAGS) -Wl,-bexpall,-bnolibpath,-bM:SRE'; \
 538         $(LINK_SO_SHLIB_VIA_O)
 539 link_app.aix:
 540         LDFLAGS="$(CFLAGS) $(LDFLAGS) -Wl,-brtl,-blibpath:$(LIBRPATH):$${LIBPATH:-/usr/lib:/lib}"; \
 541         $(LINK_APP)
 542
 543
 544 # Targets to build symbolic links when needed
 545 symlink.gnu symlink.solaris symlink.svr3 symlink.svr5 symlink.irix \
 546 symlink.aix:
 547         @ $(CALC_VERSIONS); \
 548         SHLIB=lib$(LIBNAME).so; \
 549         $(SYMLINK_SO)
 550 symlink.darwin:
 551         @ $(CALC_VERSIONS); \
 552         SHLIB=lib$(LIBNAME); \
 553         SHLIB_SUFFIX=.dylib; \
 554         $(SYMLINK_SO)
 555 symlink.hpux:
 556         @ $(CALC_VERSIONS); \
 557         SHLIB=lib$(LIBNAME).sl; \
 558         expr $(PLATFORM) : '.*ia64' > /dev/null && SHLIB=lib$(LIBNAME).so; \
 559         $(SYMLINK_SO)
 560 # The following lines means those specific architectures do no symlinks
 561 symlink.cygwin symlink.alpha-osf1 symlink.tru64 symlink.tru64-rpath:
 562
 563 # Compatibility targets
 564 link_dso.bsd-gcc-shared link_dso.linux-shared link_dso.gnu-shared: link_dso.gnu
 565 link_shlib.bsd-gcc-shared: link_shlib.linux-shared
 566 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.mingw-shared: link_dso.cygwin
 581 link_shlib.mingw-shared: link_shlib.mingw
 582 link_app.mingw-shared: link_app.cygwin
 583 symlink.mingw-shared: symlink.cygwin
 584 link_dso.alpha-osf1-shared: link_dso.alpha-osf1
 585 link_shlib.alpha-osf1-shared: link_shlib.alpha-osf1
 586 link_app.alpha-osf1-shared: link_app.alpha-osf1
 587 symlink.alpha-osf1-shared: symlink.alpha-osf1
 588 link_dso.tru64-shared: link_dso.tru64
 589 link_shlib.tru64-shared: link_shlib.tru64
 590 link_app.tru64-shared: link_app.tru64
 591 symlink.tru64-shared: symlink.tru64
 592 link_dso.tru64-shared-rpath: link_dso.tru64-rpath
 593 link_shlib.tru64-shared-rpath: link_shlib.tru64-rpath
 594 link_app.tru64-shared-rpath: link_app.tru64-rpath
 595 symlink.tru64-shared-rpath: symlink.tru64-rpath
 596 link_dso.solaris-shared: link_dso.solaris
 597 link_shlib.solaris-shared: link_shlib.solaris
 598 link_app.solaris-shared: link_app.solaris
 599 symlink.solaris-shared: symlink.solaris
 600 link_dso.svr3-shared: link_dso.svr3
 601 link_shlib.svr3-shared: link_shlib.svr3
 602 link_app.svr3-shared: link_app.svr3
 603 symlink.svr3-shared: symlink.svr3
 604 link_dso.svr5-shared: link_dso.svr5
 605 link_shlib.svr5-shared: link_shlib.svr5
 606 link_app.svr5-shared: link_app.svr5
 607 symlink.svr5-shared: symlink.svr5
 608 link_dso.irix-shared: link_dso.irix
 609 link_shlib.irix-shared: link_shlib.irix
 610 link_app.irix-shared: link_app.irix
 611 symlink.irix-shared: symlink.irix
 612 link_dso.hpux-shared: link_dso.hpux
 613 link_shlib.hpux-shared: link_shlib.hpux
 614 link_app.hpux-shared: link_app.hpux
 615 symlink.hpux-shared: symlink.hpux
 616 link_dso.aix-shared: link_dso.aix
 617 link_shlib.aix-shared: link_shlib.aix
 618 link_app.aix-shared: link_app.aix
 619 symlink.aix-shared: symlink.aix