mirror of
https://github.com/bulletphysics/bullet3
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129 lines
4.3 KiB
Plaintext
129 lines
4.3 KiB
Plaintext
#==============================================================================
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# Utility functions for collecting information about the Jam environment.
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# Copyright (C)2004 by Eric Sunshine <sunshine@sunshineco.com>
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#
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# This library is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Library General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version.
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#
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# This library is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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# License for more details.
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#
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# You should have received a copy of the GNU Library General Public License
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# along with this library; if not, write to the Free Software Foundation,
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# Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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#==============================================================================
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#------------------------------------------------------------------------------
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# When the target "dumptargets" is invoked, dump the top-level, user-visible
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# build targets as a whitespace-delimited list to the file named by the Jam
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# variable DUMPTARGETS_FILE. Example:
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#
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# jam -sDUMPTARGETS_FILE=targets.txt dumptargets
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#
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# This output might be useful, for instance, when composing documentation (via
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# some automated mechanism) which lists the targets visible to the user.
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#
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# IMPLEMENTATION NOTES
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#
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# The emitted target names are collected from several locations:
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#
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# - All single-word arguments to NotFile composed of ._- and alphanumerics.
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#
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# - Targets defined by the Application rule. Unlike other rules (Plugin,
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# Library, etc.) which compose a top-level pseudo-target using NotFile
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# (which is thus caught by the above case), on Unix, the Application rule
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# does not invoke NotFile since the top-level target has the same name as
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# the generated executable.
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#
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# - Targets defined by the ShellScript rule, since the emitted shell scripts
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# have the same name as the top-level target.
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#
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# Collection occurs in two phases. This file must be included by build.jam
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# before any other utility *.jam files are included, and it must also be
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# included after all other utility *.jam files are included. In the first
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# phase, the NotFile rule is re-defined so that we can catch pseudo-targets
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# created by the other utility *.jam files (we must re-define NotFile before
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# they are included), as well as any NotFile pseudo-targets created by Jamfiles
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# throughout the project. In the second phase, the Application and ShellScript
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# rules are re-defined (we must do so after application.jam has defined the
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# implementations which we override). These overrides allow us to catch
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# application and shell-script targets which project-wide Jamfiles define.
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#------------------------------------------------------------------------------
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if $(DUMPTARGETS_FILE)
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{
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# Jam does not support arithmetic, so we fake it with Roman numerals.
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DUMPTARGETS_PASS ?= "" ;
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DUMPTARGETS_PASS = "$(DUMPTARGETS_PASS)I" ;
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switch $(DUMPTARGETS_PASS)
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{
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case I :
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actions InitPseudoTargets
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{
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$(RM) $(<)
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}
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rule DumpPseudoTargets
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{
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NotFile $(<) ;
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Always $(<) ;
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Depends $(<) : $(>) ;
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Always $(>) ;
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InitPseudoTargets $(>) ;
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}
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DumpPseudoTargets dumptargets : "$(DUMPTARGETS_FILE)" ;
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actions together piecemeal EmitPseudoTarget
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{
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echo "$(>)" >> $(<)
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}
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rule PossiblePseudoTarget
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{
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# NoCare and Includes are not actually required; they are used here merely to
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# avoid Jam's "using independent target" warning. Note, however, that Jam
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# 2.4 and BoostJam try building the target despite the fact that we NoCare
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# about it. (Presumably this is because the targets have updating actions,
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# and those actions override the NoCare.) Consequently, we have to put up
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# with the "using independent target" warnings for these older Jam versions.
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NoCare $(<) ;
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if $(JAMVERSION) != 2.4 { Includes dumptargets : $(<) ; }
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local i ;
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for i in $(<)
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{
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local s = [ Match ^([A-Za-z0-9_.-]+)$ : $(i) ] ;
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if $(s)
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{
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EmitPseudoTarget "$(DUMPTARGETS_FILE)" : $(i) ;
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}
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}
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}
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rule NotFile
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{
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PossiblePseudoTarget $(<) ;
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}
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case II :
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rule Application
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{
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PossiblePseudoTarget $(<) $(<)clean ;
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}
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rule ShellScript
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{
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PossiblePseudoTarget $(<) $(<)clean ;
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}
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}
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}
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