917b94df98
* In certain cases, a C++ software may result in linking to a different and incompatible C++ standard library than its dependencies and still works fine because it is by design. Examples include GCC, which will bootstrap itself and self-host after finish. * Add a cxxstdlib_check method to formula to request changing the C++ standard library checking. Currently using "cxxstdlib_check :skip" will let a formula skip such checking. This should only be used on rare occasions and be very careful. Closes Homebrew/homebrew#23687.
55 lines
1.6 KiB
Ruby
55 lines
1.6 KiB
Ruby
class CxxStdlib
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attr_accessor :type, :compiler
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def initialize(type, compiler)
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if type && ![:libstdcxx, :libcxx].include?(type)
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raise ArgumentError, "Invalid C++ stdlib type: #{type}"
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end
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@type = type.to_sym if type
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@compiler = compiler.to_sym
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end
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def apple_compiler?
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not compiler.to_s =~ SharedEnvExtension::GNU_GCC_REGEXP
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end
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def compatible_with?(other)
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# If either package doesn't use C++, all is well
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return true if type.nil? || other.type.nil?
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# libstdc++ and libc++ aren't ever intercompatible
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return false unless type == other.type
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# libstdc++ is compatible across Apple compilers, but
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# not between Apple and GNU compilers, or between GNU compiler versions
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return false if apple_compiler? && !other.apple_compiler?
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if compiler.to_s =~ SharedEnvExtension::GNU_GCC_REGEXP
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return false unless other.compiler.to_s =~ SharedEnvExtension::GNU_GCC_REGEXP
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return false unless compiler.to_s[4..6] == other.compiler.to_s[4..6]
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end
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true
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end
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def check_dependencies(formula, deps)
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unless formula.cxxstdlib.include? :skip
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deps.each do |dep|
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# Software is unlikely to link against anything from its
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# buildtime deps, so it doesn't matter at all if they link
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# against different C++ stdlibs
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next if dep.tags.include? :build
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dep_stdlib = Tab.for_formula(dep.to_formula).cxxstdlib
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if !compatible_with? dep_stdlib
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raise IncompatibleCxxStdlibs.new(formula, dep, dep_stdlib, self)
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end
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end
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end
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end
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def type_string
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type.to_s.gsub(/cxx$/, 'c++')
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end
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end
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