103 lines
3.2 KiB
Ruby
103 lines
3.2 KiB
Ruby
class Keg
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def relocate_dynamic_linkage(relocation)
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# Patching the dynamic linker of glibc breaks it.
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return if name == "glibc"
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# Patching patchelf using itself fails with "Text file busy" or SIGBUS.
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return if name == "patchelf"
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elf_files.each do |file|
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file.ensure_writable do
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change_rpath(file, relocation.old_prefix, relocation.new_prefix)
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end
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end
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end
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def change_rpath(file, old_prefix, new_prefix)
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return if !file.elf? || !file.dynamic_elf?
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patchelf = DevelopmentTools.locate "patchelf"
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cmd_rpath = [patchelf, "--print-rpath", file]
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old_rpath = Utils.popen_read(*cmd_rpath, err: :out).strip
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# patchelf requires that the ELF file have a .dynstr section.
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# Skip ELF files that do not have a .dynstr section.
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return if ["cannot find section .dynstr", "strange: no string table"].include?(old_rpath)
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unless $CHILD_STATUS.success?
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raise ErrorDuringExecution.new(cmd_rpath, status: $CHILD_STATUS, output: [[:stderr, old_rpath]])
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end
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rpath = old_rpath
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.split(":")
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.map { |x| x.sub(old_prefix, new_prefix) }
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.select { |x| x.start_with?(new_prefix, "$ORIGIN") }
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lib_path = "#{new_prefix}/lib"
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rpath << lib_path unless rpath.include? lib_path
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new_rpath = rpath.join(":")
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cmd = [patchelf, "--force-rpath", "--set-rpath", new_rpath]
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if file.binary_executable?
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old_interpreter = Utils.safe_popen_read(patchelf, "--print-interpreter", file).strip
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new_interpreter = if File.readable? "#{new_prefix}/lib/ld.so"
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"#{new_prefix}/lib/ld.so"
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else
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old_interpreter.sub old_prefix, new_prefix
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end
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cmd << "--set-interpreter" << new_interpreter if old_interpreter != new_interpreter
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end
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return if old_rpath == new_rpath && old_interpreter == new_interpreter
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safe_system(*cmd, file)
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end
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def detect_cxx_stdlibs(options = {})
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skip_executables = options.fetch(:skip_executables, false)
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results = Set.new
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elf_files.each do |file|
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next unless file.dynamic_elf?
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next if file.binary_executable? && skip_executables
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dylibs = file.dynamically_linked_libraries
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results << :libcxx if dylibs.any? { |s| s.include? "libc++.so" }
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results << :libstdcxx if dylibs.any? { |s| s.include? "libstdc++.so" }
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end
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results.to_a
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end
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def elf_files
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hardlinks = Set.new
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elf_files = []
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path.find do |pn|
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next if pn.symlink? || pn.directory?
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next if !pn.dylib? && !pn.binary_executable?
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# If we've already processed a file, ignore its hardlinks (which have the
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# same dev ID and inode). This prevents relocations from being performed
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# on a binary more than once.
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next unless hardlinks.add? [pn.stat.dev, pn.stat.ino]
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elf_files << pn
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end
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elf_files
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end
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def self.relocation_formulae
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["patchelf"]
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end
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def self.bottle_dependencies
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@bottle_dependencies ||= begin
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formulae = relocation_formulae
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gcc = Formula["gcc"]
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if !ENV["HOMEBREW_FORCE_HOMEBREW_ON_LINUX"] &&
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DevelopmentTools.non_apple_gcc_version("gcc") < gcc.version.to_i
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formulae += gcc.recursive_dependencies.map(&:name)
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formulae << gcc.name
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end
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formulae
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end
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end
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end
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