1# Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved 2# Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com) 3# Copyright (C) 2010 Andras Becsi (abecsi@inf.u-szeged.hu), University of Szeged 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 9# 1. Redistributions of source code must retain the above copyright 10# notice, this list of conditions and the following disclaimer. 11# 2. Redistributions in binary form must reproduce the above copyright 12# notice, this list of conditions and the following disclaimer in the 13# documentation and/or other materials provided with the distribution. 14# 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 15# its contributors may be used to endorse or promote products derived 16# from this software without specific prior written permission. 17# 18# THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 19# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21# DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 22# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 25# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29# Module to share code to detect the existance of features in built binaries. 30 31use strict; 32use warnings; 33 34BEGIN { 35 use Exporter (); 36 our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS); 37 $VERSION = 1.00; 38 @ISA = qw(Exporter); 39 @EXPORT = qw(&checkWebCoreFeatureSupport 40 &removeLibraryDependingOnFeature); 41 %EXPORT_TAGS = ( ); 42 @EXPORT_OK = (); 43} 44 45sub libraryContainsSymbol($$) 46{ 47 my ($path, $symbol) = @_; 48 49 if (isCygwin() or isWindows()) { 50 # FIXME: Implement this for Windows. 51 return 0; 52 } 53 54 my $foundSymbol = 0; 55 if (-e $path) { 56 open NM, "-|", "nm", $path or die; 57 while (<NM>) { 58 $foundSymbol = 1 if /$symbol/; # FIXME: This should probably check for word boundaries before/after the symbol name. 59 } 60 close NM; 61 } 62 return $foundSymbol; 63} 64 65sub hasFeature($$) 66{ 67 my ($featureName, $path) = @_; 68 my %symbolForFeature = ( 69 "MathML" => "MathMLElement", 70 "SVG" => "SVGDefsElement", # We used to look for SVGElement but isSVGElement exists (and would match) in --no-svg builds. 71 "Accelerated Compositing" => "GraphicsLayer", 72 "3D Rendering" => "WebCoreHas3DRendering", 73 "3D Canvas" => "WebGLShader", 74 "WML" => "WMLElement", 75 "XHTMLMP" => "isXHTMLMPDocument", 76 ); 77 my $symbolName = $symbolForFeature{$featureName}; 78 die "Unknown feature: $featureName" unless $symbolName; 79 return libraryContainsSymbol($path, $symbolName); 80} 81 82sub checkWebCoreFeatureSupport($$) 83{ 84 my ($feature, $required) = @_; 85 my $libraryName = "WebCore"; 86 my $path = builtDylibPathForName($libraryName); 87 my $hasFeature = hasFeature($feature, $path); 88 if ($required && !$hasFeature) { 89 die "$libraryName at \"$path\" does not include $hasFeature support. See build-webkit --help\n"; 90 } 91 return $hasFeature; 92} 93 94sub removeLibraryDependingOnFeature($$$) 95{ 96 my ($libraryName, $featureName, $shouldHaveFeature) = @_; 97 my $path = builtDylibPathForName($libraryName); 98 return unless -x $path; 99 100 my $hasFeature = hasFeature($featureName, $path); 101 system "rm -f $path" if ($shouldHaveFeature xor $hasFeature); 102} 103 1041; 105