ceph/src/boost/tools/build/src/tools/common.jam

   1 # Copyright 2003, 2005 Dave Abrahams
   2 # Copyright 2005, 2006 Rene Rivera
   3 # Copyright 2005 Toon Knapen
   4 # Copyright 2002, 2003, 2004, 2005, 2006 Vladimir Prus
   5 # Distributed under the Boost Software License, Version 1.0.
   6 # (See accompanying file LICENSE.txt or https://www.bfgroup.xyz/b2/LICENSE.txt)
   7
   8 #   Provides actions common to all toolsets, such as creating directories and
   9 # removing files.
  10
  11 import os ;
  12 import modules ;
  13 import utility ;
  14 import print ;
  15 import type ;
  16 import feature ;
  17 import errors ;
  18 import path ;
  19 import sequence ;
  20 import toolset ;
  21 import virtual-target ;
  22 import numbers ;
  23
  24 if [ MATCH (--debug-configuration) : [ modules.peek : ARGV ] ]
  25 {
  26     .debug-configuration = true ;
  27 }
  28 if [ MATCH (--show-configuration) : [ modules.peek : ARGV ] ]
  29 {
  30     .show-configuration = true ;
  31 }
  32
  33 # Configurations
  34 #
  35 # The following class helps to manage toolset configurations. Each configuration
  36 # has a unique ID and one or more parameters. A typical example of a unique ID
  37 # is a condition generated by 'common.check-init-parameters' rule. Other kinds
  38 # of IDs can be used. Parameters may include any details about the configuration
  39 # like 'command', 'path', etc.
  40 #
  41 # A toolset configuration may be in one of the following states:
  42 #
  43 #   - registered
  44 #       Configuration has been registered (e.g. explicitly or by auto-detection
  45 #       code) but has not yet been marked as used, i.e. 'toolset.using' rule has
  46 #       not yet been called for it.
  47 #   - used
  48 #       Once called 'toolset.using' rule marks the configuration as 'used'.
  49 #
  50 # The main difference between the states above is that while a configuration is
  51 # 'registered' its options can be freely changed. This is useful in particular
  52 # for autodetection code - all detected configurations may be safely overwritten
  53 # by user code.
  54
  55 class configurations
  56 {
  57     import errors ;
  58
  59     rule __init__ ( )
  60     {
  61     }
  62
  63     # Registers a configuration.
  64     #
  65     # Returns 'true' if the configuration has been added and an empty value if
  66     # it already exists. Reports an error if the configuration is 'used'.
  67     #
  68     rule register ( id )
  69     {
  70         if $(id) in $(self.used)
  71         {
  72             errors.error "common: the configuration '$(id)' is in use" ;
  73         }
  74
  75         local retval ;
  76
  77         if ! $(id) in $(self.all)
  78         {
  79             self.all += $(id) ;
  80
  81             # Indicate that a new configuration has been added.
  82             retval = true ;
  83         }
  84
  85         return $(retval) ;
  86     }
  87
  88     # Mark a configuration as 'used'.
  89     #
  90     # Returns 'true' if the state of the configuration has been changed to
  91     # 'used' and an empty value if it the state has not been changed. Reports an
  92     # error if the configuration is not known.
  93     #
  94     rule use ( id )
  95     {
  96         if ! $(id) in $(self.all)
  97         {
  98             errors.error "common: the configuration '$(id)' is not known" ;
  99         }
 100
 101         local retval ;
 102
 103         if ! $(id) in $(self.used)
 104         {
 105             self.used += $(id) ;
 106
 107             # Indicate that the configuration has been marked as 'used'.
 108             retval = true ;
 109         }
 110
 111         return $(retval) ;
 112     }
 113
 114     # Return all registered configurations.
 115     #
 116     rule all ( )
 117     {
 118         return $(self.all) ;
 119     }
 120
 121     # Return all used configurations.
 122     #
 123     rule used ( )
 124     {
 125         return $(self.used) ;
 126     }
 127
 128     # Returns the value of a configuration parameter.
 129     #
 130     rule get ( id : param )
 131     {
 132         return $(self.$(param).$(id)) ;
 133     }
 134
 135     # Sets the value of a configuration parameter.
 136     #
 137     rule set ( id : param : value * )
 138     {
 139         self.$(param).$(id) = $(value) ;
 140     }
 141 }
 142
 143
 144 # The rule for checking toolset parameters. Trailing parameters should all be
 145 # parameter name/value pairs. The rule will check that each parameter either has
 146 # a value in each invocation or has no value in each invocation. Also, the rule
 147 # will check that the combination of all parameter values is unique in all
 148 # invocations.
 149 #
 150 # Each parameter name corresponds to a subfeature. This rule will declare a
 151 # subfeature the first time a non-empty parameter value is passed and will
 152 # extend it with all the values.
 153 #
 154 # The return value from this rule is a condition to be used for flags settings.
 155 #
 156 rule check-init-parameters ( toolset requirement * : * )
 157 {
 158     local sig = $(toolset) ;
 159     local condition = <toolset>$(toolset) ;
 160     local subcondition ;
 161     for local index in 2 3 4 5 6 7 8 9
 162     {
 163         local name = $($(index)[1]) ;
 164         local value = $($(index)[2]) ;
 165
 166         if $(value)-is-not-empty
 167         {
 168             condition = $(condition)-$(value) ;
 169             if $(.had-unspecified-value.$(toolset).$(name))
 170             {
 171                 errors.user-error
 172                     "$(toolset) initialization: parameter '$(name)'"
 173                     "inconsistent" : "no value was specified in earlier"
 174                     "initialization" : "an explicit value is specified now" ;
 175             }
 176             # The below logic is for intel compiler. It calls this rule with
 177             # 'intel-linux' and 'intel-win' as toolset, so we need to get the
 178             # base part of toolset name. We can not pass 'intel' as toolset
 179             # because in that case it will be impossible to register versionless
 180             # intel-linux and intel-win toolsets of a specific version.
 181             local t = $(toolset) ;
 182             local m = [ MATCH "([^-]*)-" : $(toolset) ] ;
 183             if $(m)
 184             {
 185                 t = $(m[1]) ;
 186             }
 187             if ! $(.had-value.$(toolset).$(name))
 188             {
 189                 if ! $(.declared-subfeature.$(t).$(name))
 190                 {
 191                     feature.subfeature toolset $(t) : $(name) : : propagated ;
 192                     .declared-subfeature.$(t).$(name) = true ;
 193                 }
 194                 .had-value.$(toolset).$(name) = true ;
 195             }
 196             feature.extend-subfeature toolset $(t) : $(name) : $(value) ;
 197             subcondition += <toolset-$(t):$(name)>$(value) ;
 198         }
 199         else
 200         {
 201             if $(.had-value.$(toolset).$(name))
 202             {
 203                 errors.user-error
 204                     "$(toolset) initialization: parameter '$(name)'"
 205                     "inconsistent" : "an explicit value was specified in an"
 206                     "earlier initialization" : "no value is specified now" ;
 207             }
 208             .had-unspecified-value.$(toolset).$(name) = true ;
 209         }
 210         sig = $(sig)$(value:E="")- ;
 211     }
 212     # We also need to consider requirements on the toolset as we can
 213     # configure the same toolset multiple times with different options that
 214     # are selected with the requirements.
 215     if $(requirement)
 216     {
 217         sig = $(sig)$(requirement:J=,) ;
 218     }
 219     if $(sig) in $(.all-signatures)
 220     {
 221         local message =
 222             "duplicate initialization of $(toolset) with the following parameters: " ;
 223         for local index in 2 3 4 5 6 7 8 9
 224         {
 225             local p = $($(index)) ;
 226             if $(p)
 227             {
 228                 message += "$(p[1]) = $(p[2]:E=<unspecified>)" ;
 229             }
 230         }
 231         message += "previous initialization at $(.init-loc.$(sig))" ;
 232         errors.user-error
 233             $(message[1]) : $(message[2]) : $(message[3]) : $(message[4]) :
 234             $(message[5]) : $(message[6]) : $(message[7]) : $(message[8]) ;
 235     }
 236     .all-signatures += $(sig) ;
 237     .init-loc.$(sig) = [ errors.nearest-user-location ] ;
 238
 239     # If we have a requirement, this version should only be applied under that
 240     # condition. To accomplish this we add a toolset requirement that imposes
 241     # the toolset subcondition, which encodes the version.
 242     if $(requirement)
 243     {
 244         local r = <toolset>$(toolset) $(requirement) ;
 245         r = $(r:J=,) ;
 246         toolset.add-requirements "$(r):$(subcondition)" ;
 247     }
 248
 249     # We add the requirements, if any, to the condition to scope the toolset
 250     # variables and options to this specific version.
 251     condition += $(requirement) ;
 252
 253     if $(.show-configuration)
 254     {
 255         ECHO "notice:" $(condition) ;
 256     }
 257     return $(condition:J=/) ;
 258 }
 259
 260
 261 # A helper rule to get the command to invoke some tool. If
 262 # 'user-provided-command' is not given, tries to find binary named 'tool' in
 263 # PATH and in the passed 'additional-path'. Otherwise, verifies that the first
 264 # element of 'user-provided-command' is an existing program.
 265 #
 266 # This rule returns the command to be used when invoking the tool. If we can not
 267 # find the tool, a warning is issued. If 'path-last' is specified, PATH is
 268 # checked after 'additional-paths' when searching for 'tool'.
 269 #
 270 rule get-invocation-command-nodefault ( toolset : tool :
 271     user-provided-command * : additional-paths * : path-last ? )
 272 {
 273     local command ;
 274     if ! $(user-provided-command)
 275     {
 276         command = [ find-tool $(tool) : $(additional-paths) : $(path-last) ] ;
 277         if ! $(command) && $(.debug-configuration)
 278         {
 279             ECHO "warning:" toolset $(toolset) "initialization:" can not find tool
 280                 $(tool) ;
 281             ECHO "warning:" initialized from [ errors.nearest-user-location ] ;
 282         }
 283     }
 284     else
 285     {
 286         command = [ check-tool $(user-provided-command) ] ;
 287         if ! $(command) && $(.debug-configuration)
 288         {
 289             ECHO "warning:" toolset $(toolset) "initialization:" ;
 290             ECHO "warning:" can not find user-provided command
 291                 '$(user-provided-command)' ;
 292             ECHO "warning:" initialized from [ errors.nearest-user-location ] ;
 293         }
 294     }
 295
 296     return $(command) ;
 297 }
 298
 299
 300 # Same as get-invocation-command-nodefault, except that if no tool is found,
 301 # returns either the user-provided-command, if present, or the 'tool' parameter.
 302 #
 303 rule get-invocation-command ( toolset : tool : user-provided-command * :
 304     additional-paths * : path-last ? )
 305 {
 306     local result = [ get-invocation-command-nodefault $(toolset) : $(tool) :
 307         $(user-provided-command) : $(additional-paths) : $(path-last) ] ;
 308
 309     if ! $(result)
 310     {
 311         if $(user-provided-command)
 312         {
 313             result = $(user-provided-command) ;
 314         }
 315         else
 316         {
 317             result = $(tool) ;
 318         }
 319     }
 320     return $(result) ;
 321 }
 322
 323
 324 # Given an invocation command return the absolute path to the command. This
 325 # works even if command has no path element and was found on the PATH.
 326 #
 327 rule get-absolute-tool-path ( command )
 328 {
 329     if $(command:D)
 330     {
 331         return $(command:D) ;
 332     }
 333     else
 334     {
 335         local m = [ GLOB [ modules.peek : PATH Path path ] : $(command)
 336             $(command).exe ] ;
 337         return $(m[1]:D) ;
 338     }
 339 }
 340
 341
 342 # Attempts to find tool (binary) named 'name' in PATH and in 'additional-paths'.
 343 # If found in PATH, returns 'name' and if found in additional paths, returns
 344 # absolute name. If the tool is found in several directories, returns the first
 345 # path found. Otherwise, returns an empty string. If 'path-last' is specified,
 346 # PATH is searched after 'additional-paths'.
 347 #
 348 rule find-tool ( name : additional-paths * : path-last ? )
 349 {
 350     if $(name:D)
 351     {
 352         return [ check-tool-aux $(name) ] ;
 353     }
 354     local path = [ path.programs-path ] ;
 355     local match = [ path.glob $(path) : $(name) $(name).exe ] ;
 356     local additional-match = [ path.glob $(additional-paths) : $(name)
 357         $(name).exe ] ;
 358
 359     local result ;
 360     if $(path-last)
 361     {
 362         result = $(additional-match) ;
 363         if ! $(result) && $(match)
 364         {
 365             result = $(name) ;
 366         }
 367     }
 368     else
 369     {
 370         if $(match)
 371         {
 372             result = $(name) ;
 373         }
 374         else
 375         {
 376             result = $(additional-match) ;
 377         }
 378     }
 379     if $(result)
 380     {
 381         return [ path.native $(result[1]) ] ;
 382     }
 383 }
 384
 385 # Checks if 'command' can be found either in path or is a full name to an
 386 # existing file.
 387 #
 388 local rule check-tool-aux ( command )
 389 {
 390     if $(command:D)
 391     {
 392         if [ path.exists $(command) ]
 393             # Both NT and Cygwin will run .exe files by their unqualified names.
 394             || ( [ os.on-windows ] && [ path.exists $(command).exe ] )
 395             # Only NT will run .bat & .cmd files by their unqualified names.
 396             || ( ( [ os.name ] = NT ) && ( [ path.exists $(command).bat ] ||
 397                 [ path.exists $(command).cmd ] ) )
 398         {
 399             return $(command) ;
 400         }
 401     }
 402     else
 403     {
 404         if [ GLOB [ modules.peek : PATH Path path ] : $(command) ]
 405         {
 406             return $(command) ;
 407         }
 408     }
 409 }
 410
 411
 412 # Checks that a tool can be invoked by 'command'. If command is not an absolute
 413 # path, checks if it can be found in 'path'. If command is an absolute path,
 414 # check that it exists. Returns 'command' if ok or empty string otherwise.
 415 #
 416 local rule check-tool ( xcommand + )
 417 {
 418     if [ check-tool-aux $(xcommand[1]) ] ||
 419        [ check-tool-aux $(xcommand[-1]) ]
 420     {
 421         return $(xcommand) ;
 422     }
 423 }
 424
 425
 426 # Handle common options for toolset, specifically sets the following flag
 427 # variables:
 428 # - CONFIG_COMMAND to $(command)
 429 # - OPTIONS for compile         to the value of <compileflags> in $(options)
 430 # - OPTIONS for compile.c       to the value of <cflags>       in $(options)
 431 # - OPTIONS for compile.c++     to the value of <cxxflags>     in $(options)
 432 # - OPTIONS for compile.asm     to the value of <asmflags>     in $(options)
 433 # - OPTIONS for compile.fortran to the value of <fflags>       in $(options)
 434 # - OPTIONS for link            to the value of <linkflags>    in $(options)
 435 #
 436 rule handle-options ( toolset : condition * : command * : options * )
 437 {
 438     if $(.debug-configuration)
 439     {
 440         ECHO "notice:" will use '$(command)' for $(toolset), condition
 441             $(condition:E=(empty)) ;
 442     }
 443
 444     #   The last parameter ('unchecked') says it is OK to set flags for another
 445     # module.
 446     toolset.flags $(toolset) CONFIG_COMMAND $(condition) : $(command)
 447         : unchecked ;
 448
 449     toolset.flags $(toolset).compile         OPTIONS $(condition) :
 450         [ feature.get-values <compileflags> : $(options) ] : unchecked ;
 451
 452     toolset.flags $(toolset).compile.c       OPTIONS $(condition) :
 453         [ feature.get-values <cflags>       : $(options) ] : unchecked ;
 454
 455     toolset.flags $(toolset).compile.c++     OPTIONS $(condition) :
 456         [ feature.get-values <cxxflags>     : $(options) ] : unchecked ;
 457
 458     toolset.flags $(toolset).compile.asm     OPTIONS $(condition) :
 459         [ feature.get-values <asmflags>     : $(options) ] : unchecked ;
 460
 461     toolset.flags $(toolset).compile.fortran OPTIONS $(condition) :
 462         [ feature.get-values <fflags>       : $(options) ] : unchecked ;
 463
 464     toolset.flags $(toolset).link            OPTIONS $(condition) :
 465         [ feature.get-values <linkflags>    : $(options) ] : unchecked ;
 466 }
 467
 468
 469 # Returns the location of the "program files" directory on a Windows platform.
 470 #
 471 rule get-program-files-dir ( )
 472 {
 473     local ProgramFiles = [ modules.peek : ProgramFiles ] ;
 474     if $(ProgramFiles)
 475     {
 476         ProgramFiles = "$(ProgramFiles:J= )" ;
 477     }
 478     else
 479     {
 480         ProgramFiles = "c:\\Program Files" ;
 481     }
 482     return $(ProgramFiles) ;
 483 }
 484
 485
 486 if [ os.name ] = NT
 487 {
 488     NULL_DEVICE = "NUL" ;
 489     IGNORE = "2>$(NULL_DEVICE) >$(NULL_DEVICE) & setlocal" ;
 490     RM = del /f /q ;
 491     CP = copy /b ;
 492     LN ?= $(CP) ;
 493     # Ugly hack to convince copy to set the timestamp of the destination to the
 494     # current time by concatenating the source with a nonexistent file. Note
 495     # that this requires /b (binary) as the default when concatenating files is
 496     # /a (ascii).
 497     WINDOWS-CP-HACK = "+ this-file-does-not-exist-A698EE7806899E69" ;
 498 }
 499 else if [ os.name ] = VMS
 500 {
 501     NULL_DEVICE = "NL:" ;
 502     PIPE = PIPE ;
 503     IGNORE = "2>$(NULL_DEVICE) >$(NULL_DEVICE)" ;
 504     RM = DELETE /NOCONF ;
 505     CP = COPY /OVERWRITE ;
 506     LN = $(CP) ;
 507 }
 508 else
 509 {
 510     NULL_DEVICE = "/dev/null" ;
 511     IGNORE = "2>$(NULL_DEVICE) >$(NULL_DEVICE)" ;
 512     RM = rm -f ;
 513     CP = cp ;
 514     LN = ln ;
 515 }
 516
 517 NULL_OUT = ">$(NULL_DEVICE)" ;
 518
 519 rule null-device ( )
 520 {
 521     return $(NULL_DEVICE) ;
 522 }
 523
 524
 525 rule rm-command ( )
 526 {
 527     return $(RM) ;
 528 }
 529
 530
 531 rule copy-command ( )
 532 {
 533     return $(CP) ;
 534 }
 535
 536
 537 if "\n" = "n"
 538 {
 539     # Escape characters not supported so use ugly hacks. Will not work on Cygwin
 540     # - see below.
 541     nl = "
 542 " ;
 543     q = "" ;
 544 }
 545 else
 546 {
 547     nl = "\n" ;
 548     q = "\"" ;
 549 }
 550
 551
 552 rule newline-char ( )
 553 {
 554     return $(nl) ;
 555 }
 556
 557
 558 # Returns the command needed to set an environment variable on the current
 559 # platform. The variable setting persists through all following commands and is
 560 # visible in the environment seen by subsequently executed commands. In other
 561 # words, on Unix systems, the variable is exported, which is consistent with the
 562 # only possible behavior on Windows systems.
 563 #
 564 rule variable-setting-command ( variable : value )
 565 {
 566     if [ os.name ] = NT
 567     {
 568         return "set $(variable)=$(value)$(nl)" ;
 569     }
 570     else if [ os.name ] = VMS
 571     {
 572         return "$(variable) == $(q)$(value)$(q)$(nl)" ;
 573     }
 574     else
 575     {
 576         # If we do not have escape character support in bjam, the cod below
 577         # blows up on CYGWIN, since the $(nl) variable holds a Windows new-line
 578         # \r\n sequence that messes up the executed export command which then
 579         # reports that the passed variable name is incorrect.
 580         # But we have a check for cygwin in kernel/bootstrap.jam already.
 581         return "$(variable)=$(q)$(value)$(q)$(nl)export $(variable)$(nl)" ;
 582     }
 583 }
 584
 585
 586 # Returns a command to sets a named shell path variable to the given NATIVE
 587 # paths on the current platform.
 588 #
 589 rule path-variable-setting-command ( variable : paths * )
 590 {
 591     local sep = [ os.path-separator ] ;
 592     return [ variable-setting-command $(variable) : $(paths:J=$(sep)) ] ;
 593 }
 594
 595
 596 # Returns a command that prepends the given paths to the named path variable on
 597 # the current platform.
 598 #
 599 rule prepend-path-variable-command ( variable : paths * )
 600 {
 601     return [ path-variable-setting-command $(variable)
 602         : $(paths) [ os.expand-variable $(variable) ] ] ;
 603 }
 604
 605
 606 # Return a command which can create a file. If 'r' is result of invocation, then
 607 # 'r foobar' will create foobar with unspecified content. What happens if file
 608 # already exists is unspecified.
 609 #
 610 rule file-creation-command ( )
 611 {
 612     if [ os.name ] = NT
 613     {
 614         # A few alternative implementations on Windows:
 615         #
 616         #   'type NUL >> '
 617         #        That would construct an empty file instead of a file containing
 618         #      a space and an end-of-line marker but it would also not change
 619         #      the target's timestamp in case the file already exists.
 620         #
 621         #   'type NUL > '
 622         #        That would construct an empty file instead of a file containing
 623         #      a space and an end-of-line marker but it would also destroy an
 624         #      already existing file by overwriting it with an empty one.
 625         #
 626         #   I guess the best solution would be to allow Boost Jam to define
 627         # built-in functions such as 'create a file', 'touch a file' or 'copy a
 628         # file' which could be used from inside action code. That would allow
 629         # completely portable operations without this kind of kludge.
 630         #                                            (22.02.2009.) (Jurko)
 631         return "echo. > " ;
 632     }
 633     else if [ os.name ] = VMS
 634     {
 635         return "APPEND /NEW NL: " ;
 636     }
 637     else
 638     {
 639         return "touch " ;
 640     }
 641 }
 642
 643
 644 # Returns a command that may be used for 'touching' files. It is not a real
 645 # 'touch' command on NT because it adds an empty line at the end of file but it
 646 # works with source files.
 647 #
 648 rule file-touch-command ( )
 649 {
 650     if [ os.name ] = NT
 651     {
 652         return "echo. >> " ;
 653     }
 654     else if [ os.name ] = VMS
 655     {
 656         return "APPEND /NEW NL: " ;
 657     }
 658     else
 659     {
 660         return "touch " ;
 661     }
 662 }
 663
 664
 665 rule MkDir
 666 {
 667     # If dir exists, do not update it. Do this even for $(DOT).
 668     NOUPDATE $(<) ;
 669
 670     if $(<) != $(DOT) && ! $($(<)-mkdir)
 671     {
 672         # Cheesy gate to prevent multiple invocations on same dir.
 673         $(<)-mkdir = true ;
 674
 675         # Schedule the mkdir build action.
 676         common.mkdir $(<) ;
 677
 678         # Prepare a Jam 'dirs' target that can be used to make the build only
 679         # construct all the target directories.
 680         DEPENDS dirs : $(<) ;
 681
 682         # Recursively create parent directories. $(<:P) = $(<)'s parent & we
 683         # recurse until root.
 684
 685         local s = $(<:P) ;
 686         if [ os.name ] = NT
 687         {
 688             switch $(s)
 689             {
 690                 case "*:"   : s = ;
 691                 case "*:\\" : s = ;
 692             }
 693         }
 694
 695         if $(s)
 696         {
 697             if $(s) != $(<)
 698             {
 699                 DEPENDS $(<) : $(s) ;
 700                 MkDir $(s) ;
 701             }
 702             else
 703             {
 704                 NOTFILE $(s) ;
 705             }
 706         }
 707     }
 708 }
 709
 710
 711 #actions MkDir1
 712 #{
 713 #    mkdir "$(<)"
 714 #}
 715
 716 #   The following quick-fix actions should be replaced using the original MkDir1
 717 # action once Boost Jam gets updated to correctly detect different paths leading
 718 # up to the same filesystem target and triggers their build action only once.
 719 #                                             (todo) (04.07.2008.) (Jurko)
 720
 721 if [ os.name ] = NT
 722 {
 723     actions quietly mkdir
 724     {
 725         if not exist "$(<)\\" mkdir "$(<)"
 726     }
 727 }
 728 else
 729 {
 730     actions quietly mkdir
 731     {
 732         mkdir -p "$(<)"
 733     }
 734 }
 735
 736
 737 actions piecemeal together existing Clean
 738 {
 739     $(RM) "$(>)"
 740 }
 741
 742
 743 rule copy
 744 {
 745 }
 746
 747
 748 actions copy
 749 {
 750     $(CP) "$(>)" $(WINDOWS-CP-HACK) "$(<)"
 751 }
 752
 753
 754 rule RmTemps
 755 {
 756 }
 757
 758
 759 actions quietly updated piecemeal together RmTemps
 760 {
 761     $(RM) "$(>)" $(IGNORE)
 762 }
 763
 764
 765 actions hard-link
 766 {
 767     $(RM) "$(<)" 2$(NULL_OUT) $(NULL_OUT)
 768     $(LN) "$(>)" "$(<)" $(NULL_OUT)
 769 }
 770
 771
 772 if [ os.name ] = VMS
 773 {
 774     actions mkdir
 775     {
 776         IF F$PARSE("$(<:W)") .EQS. "" THEN CREATE /DIR $(<:W)
 777     }
 778
 779     actions piecemeal together existing Clean
 780     {
 781         $(RM) $(>:WJ=;*,);*
 782     }
 783
 784     actions copy
 785     {
 786         $(CP) $(>:WJ=,) $(<:W)
 787     }
 788
 789     actions quietly updated piecemeal together RmTemps
 790     {
 791         $(PIPE) $(RM) $(>:WJ=;*,);* $(IGNORE)
 792     }
 793
 794     actions hard-link
 795     {
 796         $(PIPE) $(RM) $(>[1]:W);* $(IGNORE)
 797         $(PIPE) $(LN) $(>[1]:W) $(<:W) $(NULL_OUT)
 798     }
 799 }
 800
 801 # Given a target, as given to a custom tag rule, returns a string formatted
 802 # according to the passed format. Format is a list of properties that is
 803 # represented in the result. For each element of format the corresponding target
 804 # information is obtained and added to the result string. For all, but the
 805 # literal, the format value is taken as the as string to prepend to the output
 806 # to join the item to the rest of the result. If not given "-" is used as a
 807 # joiner.
 808 #
 809 # The format options can be:
 810 #
 811 #   <base>[joiner]
 812 #       ::  The basename of the target name.
 813 #   <toolset>[joiner]
 814 #       ::  The abbreviated toolset tag being used to build the target.
 815 #   <threading>[joiner]
 816 #       ::  Indication of a multi-threaded build.
 817 #   <runtime>[joiner]
 818 #       ::  Collective tag of the build runtime.
 819 #   <version:/version-feature | X.Y[.Z]/>[joiner]
 820 #       ::  Short version tag taken from the given "version-feature" in the
 821 #           build properties. Or if not present, the literal value as the
 822 #           version number.
 823 #   <property:/property-name/>[joiner]
 824 #       ::  Direct lookup of the given property-name value in the build
 825 #           properties. /property-name/ is a regular expression. E.g.
 826 #           <property:toolset-.*:flavor> will match every toolset.
 827 #   /otherwise/
 828 #       ::  The literal value of the format argument.
 829 #
 830 # For example this format:
 831 #
 832 #   boost_ <base> <toolset> <threading> <runtime> <version:boost-version>
 833 #
 834 # Might return:
 835 #
 836 #   boost_thread-vc80-mt-gd-1_33.dll, or
 837 #   boost_regex-vc80-gd-1_33.dll
 838 #
 839 # The returned name also has the target type specific prefix and suffix which
 840 # puts it in a ready form to use as the value from a custom tag rule.
 841 #
 842 rule format-name ( format * : name : type ? : property-set )
 843 {
 844     local result = "" ;
 845     for local f in $(format)
 846     {
 847         switch $(f:G)
 848         {
 849             case <base> :
 850                 result += $(name:B) ;
 851
 852             case <toolset> :
 853                 result += [ join-tag $(f:G=) : [ toolset-tag $(name) : $(type) :
 854                     $(property-set) ] ] ;
 855
 856             case <threading> :
 857                 result += [ join-tag $(f:G=) : [ threading-tag $(name) : $(type)
 858                     : $(property-set) ] ] ;
 859
 860             case <runtime> :
 861                 result += [ join-tag $(f:G=) : [ runtime-tag $(name) : $(type) :
 862                     $(property-set) ] ] ;
 863
 864             case <qt> :
 865                 result += [ join-tag $(f:G=) : [ qt-tag $(name) : $(type) :
 866                     $(property-set) ] ] ;
 867
 868             case <address-model> :
 869                 result += [ join-tag $(f:G=) : [ address-model-tag $(name) :
 870                     $(type) : $(property-set) ] ] ;
 871
 872             case <arch-and-model> :
 873                 result += [ join-tag $(f:G=) : [ arch-and-model-tag $(name) :
 874                     $(type) : $(property-set) ] ] ;
 875
 876             case <version:*> :
 877                 local key = [ MATCH <version:(.*)> : $(f:G) ] ;
 878                 local version = [ $(property-set).get <$(key)> ] ;
 879                 version ?= $(key) ;
 880                 version = [ MATCH "^([^.]+)[.]([^.]+)[.]?([^.]*)" : $(version) ] ;
 881                 result += [ join-tag $(f:G=) : $(version[1])_$(version[2]) ] ;
 882
 883             case <property:*> :
 884                 local key = [ MATCH <property:(.*)> : $(f:G) ] ;
 885                 local p0 = [ MATCH <($(key))> : [ $(property-set).raw ] ] ;
 886                 if $(p0)
 887                 {
 888                     local p = [ $(property-set).get <$(p0)> ] ;
 889                     if $(p)
 890                     {
 891                         result += [ join-tag $(f:G=) : $(p) ] ;
 892                     }
 893                 }
 894
 895             case * :
 896                 result += $(f:G=) ;
 897         }
 898     }
 899     return [ virtual-target.add-prefix-and-suffix $(result:J=) : $(type) :
 900         $(property-set) ] ;
 901 }
 902
 903
 904 local rule join-tag ( joiner ? : tag ? )
 905 {
 906     if ! $(joiner) { joiner = - ; }
 907     return $(joiner)$(tag) ;
 908 }
 909
 910
 911 local rule toolset-tag ( name : type ? : property-set )
 912 {
 913     local tag = ;
 914
 915     local properties = [ $(property-set).raw ] ;
 916     switch [ $(property-set).get <toolset> ]
 917     {
 918         case borland* : tag += bcb ;
 919         case clang* :
 920         {
 921             switch [ $(property-set).get <toolset-clang:platform> ]
 922             {
 923                case darwin : tag += clang-darwin ;
 924                case linux  : tag += clang ;
 925                case win    : tag += clangw ;
 926             }
 927         }
 928         case como* : tag += como ;
 929         case cw : tag += cw ;
 930         case darwin* : tag += xgcc ;
 931         case edg* : tag += edg ;
 932         case embarcadero* : tag += embtc ;
 933         case gcc* :
 934         {
 935             switch [ $(property-set).get <target-os> ]
 936             {
 937                 case *windows* : tag += mgw ;
 938                 case * : tag += gcc ;
 939             }
 940         }
 941         case intel :
 942         if [ $(property-set).get <toolset-intel:platform> ] = win
 943         {
 944             tag += iw ;
 945         }
 946         else
 947         {
 948             tag += il ;
 949         }
 950         case kcc* : tag += kcc ;
 951         case kylix* : tag += bck ;
 952         #case metrowerks* : tag += cw ;
 953         #case mingw* : tag += mgw ;
 954         case mipspro* : tag += mp ;
 955         case msvc* : tag += vc ;
 956         case qcc* : tag += qcc ;
 957         case sun* : tag += sw ;
 958         case tru64cxx* : tag += tru ;
 959         case vacpp* : tag += xlc ;
 960     }
 961     local version = [ MATCH "<toolset.*version>([0123456789]+)[.]?([0123456789]*)"
 962         : $(properties) ] ;
 963     # For historical reasons, vc6.0 and vc7.0 use different naming.
 964     if $(tag) = vc
 965     {
 966         if $(version[1]) = 6
 967         {
 968             # Cancel minor version.
 969             version = 6 ;
 970         }
 971         else if $(version[1]) = 7 && $(version[2]) = 0
 972         {
 973             version = 7 ;
 974         }
 975     }
 976
 977     # From GCC 5, versioning changes and minor becomes patch
 978     if ( $(tag) = gcc || $(tag) = mgw ) && $(version[1]) && [ numbers.less 4 $(version[1]) ]
 979     {
 980         version = $(version[1]) ;
 981     }
 982
 983     # Ditto, from Clang 4
 984     if ( $(tag) = clang || $(tag) = clangw ) && $(version[1]) && [ numbers.less 3 $(version[1]) ]
 985     {
 986         version = $(version[1]) ;
 987     }
 988
 989     # On intel, version is not added, because it does not matter and it is the
 990     # version of vc used as backend that matters. Ideally, we should encode the
 991     # backend version but that would break compatibility with V1.
 992     if $(tag) = iw
 993     {
 994         version = ;
 995     }
 996
 997     # On borland, version is not added for compatibility with V1.
 998     if $(tag) = bcb
 999     {
1000         version = ;
1001     }
1002
1003     # Use un-versioned toolset name for Embarcadero, to avoid having to update
1004     # the auto-linking logic on every release.
1005     if $(tag) = embtc
1006     {
1007         version = ;
1008     }
1009
1010     tag += $(version) ;
1011
1012     return $(tag:J=) ;
1013 }
1014
1015
1016 local rule threading-tag ( name : type ? : property-set )
1017 {
1018     if <threading>multi in [ $(property-set).raw ]
1019     {
1020         return mt ;
1021     }
1022 }
1023
1024
1025 local rule runtime-tag ( name : type ? : property-set )
1026 {
1027     local tag = ;
1028
1029     local properties = [ $(property-set).raw ] ;
1030     if <runtime-link>static in $(properties) { tag += s ; }
1031
1032     # This is an ugly thing. In V1, there is code to automatically detect which
1033     # properties affect a target. So, if <runtime-debugging> does not affect gcc
1034     # toolset, the tag rules will not even see <runtime-debugging>. Similar
1035     # functionality in V2 is not implemented yet, so we just check for toolsets
1036     # known to care about runtime debugging.
1037     if ( <toolset>msvc in $(properties) ) ||
1038         ( <stdlib>stlport in $(properties) ) ||
1039         ( <toolset-intel:platform>win in $(properties) ) ||
1040         ( <toolset-clang:platform>win in $(properties) )
1041     {
1042         if <runtime-debugging>on in $(properties) { tag += g ; }
1043     }
1044
1045     if <python-debugging>on in $(properties) { tag += y ; }
1046     if <variant>debug in $(properties) { tag += d ; }
1047     if <stdlib>stlport in $(properties) { tag += p ; }
1048     if <stdlib-stlport:iostream>hostios in $(properties) { tag += n ; }
1049
1050     return $(tag:J=) ;
1051 }
1052
1053
1054 # Create a tag for the Qt library version
1055 # "<qt>4.6.0" will result in tag "qt460"
1056 local rule qt-tag ( name : type ? : property-set )
1057 {
1058     local v = [ MATCH "([0123456789]+)[.]?([0123456789]*)[.]?([0123456789]*)" :
1059         [ $(property-set).get <qt> ] ] ;
1060     return qt$(v:J=) ;
1061 }
1062
1063
1064 # Create a tag for the address-model
1065 # <address-model>64 will simply generate "64"
1066 local rule address-model-tag ( name : type ? : property-set )
1067 {
1068     return [ $(property-set).get <address-model> ] ;
1069 }
1070
1071 # Create a tag for the architecture and model
1072 # <architecture>x86 <address-model>32 would generate "x32"
1073 # This relies on the fact that all architectures start with
1074 # unique letters.
1075 local rule arch-and-model-tag ( name : type ? : property-set )
1076 {
1077     local architecture = [ $(property-set).get <architecture> ] ;
1078     local address-model = [ $(property-set).get <address-model> ] ;
1079
1080     local arch = [ MATCH ^(.) : $(architecture) ] ;
1081
1082     return $(arch)$(address-model) ;
1083 }
1084
1085 # TODO: probably needs to escape '"' in command parts
1086 # TODO: if part does not contain whitespaces it does not require escaping
1087 rule make-command-string ( command + )
1088 {
1089     local command-string = \"$(command)\" ;
1090     return $(command-string:J=" ") ;
1091 }
1092
1093 rule find-compiler ( toolset : tool : version ? : command * : additional-paths * )
1094 {
1095     #1): use user-provided command
1096     if $(command)
1097     {
1098         if ! [ get-invocation-command-nodefault $(toolset) : $(tool)
1099              : $(command) : $(additional-paths) ]
1100         {
1101             local command-string = [ make-command-string $(command) ] ;
1102             errors.error toolset $(toolset) "initialization:"
1103                 : provided command '$(command-string)' not found
1104                 : initialized from [ errors.nearest-user-location ] ;
1105         }
1106     }
1107     #2): enforce user-provided version
1108     else if $(version)
1109     {
1110         command = [ get-invocation-command-nodefault $(toolset) : $(tool)-$(version)
1111                   : : $(additional-paths) ] ;
1112
1113         #2.1) fallback: check whether "$(tool)" reports the requested version
1114         if ! $(command) { # ?= operator does not short-circuit
1115         command ?= [ get-invocation-command-nodefault $(toolset) : $(tool)
1116                    : : $(additional-paths) ] ;
1117         }
1118
1119         if ! $(command)
1120         {
1121             errors.error toolset $(toolset) "initialization:"
1122                 : version '$(version)' requested but neither
1123                     '$(tool)-$(version)' nor default '$(tool)' found
1124                 : initialized from [ errors.nearest-user-location ] ;
1125         }
1126
1127         import $(toolset) ;
1128         local tool-version = [ $(toolset).get-full-version $(command) ] ;
1129
1130         import version ;
1131         if ! [ version.version-compatible [ SPLIT_BY_CHARACTERS $(version) : . ]
1132                                         : [ SPLIT_BY_CHARACTERS $(tool-version) : . ] ]
1133         {
1134             errors.error toolset $(toolset) "initialization:"
1135                 : version '$(version)' requested but
1136                     '$(tool)-$(version)' not found and version
1137                     '$(tool-version:J=.)' of default '$(command)'
1138                     does not match
1139                 : initialized from [ errors.nearest-user-location ]
1140                 ;
1141         }
1142     }
1143     #3) default: no command and no version specified, try using "$(tool)"
1144     else
1145     {
1146         command = [ get-invocation-command-nodefault $(toolset) : $(tool)
1147                   : : $(additional-paths) ] ;
1148         if ! $(command)
1149         {
1150             errors.error toolset $(toolset) "initialization:"
1151                 : no command provided, default command '$(tool)' not found
1152                 : initialized from [ errors.nearest-user-location ] ;
1153         }
1154     }
1155     return $(command) ;
1156 }
1157
1158 rule match-command-output ( kind ? : pattern : command-string )
1159 {
1160     local output = [ SHELL $(command-string) : exit-status ] ;
1161     if 0 != $(output[2])
1162     {
1163         errors.error '$(command-string)'
1164                      exited with error code $(output[2]) ;
1165     }
1166
1167     local match = [ MATCH $(pattern) : $(output[1]) ] ;
1168     if ! $(match)
1169     {
1170         errors.error '$(command-string)'
1171                      returned an invalid $kind string '$(output[1])' ;
1172     }
1173
1174     return $(match) ;
1175 }
1176
1177 rule __test__ ( )
1178 {
1179     import assert ;
1180
1181     local save-os = [ modules.peek os : .name ] ;
1182
1183     modules.poke os : .name : LINUX ;
1184     assert.result "PATH=\"foo:bar:baz\"\nexport PATH\n"
1185         : path-variable-setting-command PATH : foo bar baz ;
1186     assert.result "PATH=\"foo:bar:$PATH\"\nexport PATH\n"
1187         : prepend-path-variable-command PATH : foo bar ;
1188
1189     modules.poke os : .name : NT ;
1190     assert.result "set PATH=foo;bar;baz\n"
1191         : path-variable-setting-command PATH : foo bar baz ;
1192     assert.result "set PATH=foo;bar;%PATH%\n"
1193         : prepend-path-variable-command PATH : foo bar ;
1194
1195     modules.poke os : .name : $(save-os) ;
1196 }