f5c11fa342
For most formulae, the bottles need a minimum libstdc++ rather than a minimum GCC version. This is particularly important when building on Ubuntu where the default compiler version is older than libstdc++. So, checking the host libstdc++ version is a more accurate way to determine whether brew GCC is needed at runtime. This can be improved in the future to check symbol versions (e.g. GLIBCXX, CXXABI, GLIBC) which can allow some bottles to be installed even with older glibc/libstdc++.
48 lines
1.4 KiB
Ruby
48 lines
1.4 KiB
Ruby
# typed: strict
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# frozen_string_literal: true
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require "os/linux/ld"
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module OS
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module Linux
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# Helper functions for querying `libstdc++` information.
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module Libstdcxx
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SOVERSION = 6
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SONAME = T.let("libstdc++.so.#{SOVERSION}".freeze, String)
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sig { returns(T::Boolean) }
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def self.below_ci_version?
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system_version < LINUX_LIBSTDCXX_CI_VERSION
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end
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sig { returns(Version) }
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def self.system_version
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@system_version ||= T.let(nil, T.nilable(Version))
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@system_version ||= if (path = system_path)
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Version.new("#{SOVERSION}#{path.realpath.basename.to_s.delete_prefix!(SONAME)}")
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else
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Version::NULL
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end
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end
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sig { returns(T.nilable(Pathname)) }
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def self.system_path
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@system_path ||= T.let(nil, T.nilable(Pathname))
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@system_path ||= find_library(OS::Linux::Ld.library_paths(brewed: false))
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@system_path ||= find_library(OS::Linux::Ld.system_dirs(brewed: false))
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end
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sig { params(paths: T::Array[String]).returns(T.nilable(Pathname)) }
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private_class_method def self.find_library(paths)
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paths.each do |path|
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next if path.start_with?(HOMEBREW_PREFIX)
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candidate = Pathname(path)/SONAME
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return candidate if candidate.exist? && candidate.elf?
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end
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nil
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end
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end
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end
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end
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