Module: OS::Linux::Install::ClassMethods Private

Defined in:
extend/os/linux/install.rb

This module is part of a private API. This module may only be used in the Homebrew/brew repository. Third parties should avoid using this module if possible, as it may be removed or changed without warning.

Constant Summary collapse

DYNAMIC_LINKERS =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning.

This is a list of known paths to the host dynamic linker on Linux if the host glibc is new enough. The symlink_ld_so method will fail if the host linker cannot be found in this list.

%w[
  /lib64/ld-linux-x86-64.so.2
  /lib64/ld64.so.2
  /lib/ld-linux.so.3
  /lib/ld-linux.so.2
  /lib/ld-linux-aarch64.so.1
  /lib/ld-linux-armhf.so.3
  /system/bin/linker64
  /system/bin/linker
].freeze
GCC_RUNTIME_LIBS =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning.

We link GCC runtime libraries that are not specifically used for Fortran, which are linked by the GCC formula. We only use the versioned shared libraries as the other shared and static libraries are only used at build time where GCC can find its own libraries.

%w[
  libatomic.so.1
  libgcc_s.so.1
  libgomp.so.1
  libstdc++.so.6
].freeze

Instance Method Summary collapse

Instance Method Details

#check_cpu ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'extend/os/linux/install.rb', line 45

def check_cpu
  return if ::Hardware::CPU.intel? && ::Hardware::CPU.is_64_bit?
  return if ::Hardware::CPU.arm?

  message = "Sorry, Homebrew does not support your computer's CPU architecture!"
  if ::Hardware::CPU.ppc64le?
    message += <<~EOS
      For OpenPOWER Linux (PPC64LE) support, see:
        #{Formatter.url("https://github.com/homebrew-ppc64le/brew")}
    EOS
  end
  ::Kernel.abort message
end

#global_post_install ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'extend/os/linux/install.rb', line 39

def global_post_install
  super
  symlink_ld_so
  setup_preferred_gcc_libs
end

#perform_preinstall_checks(all_fatal: false) ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'extend/os/linux/install.rb', line 33

def perform_preinstall_checks(all_fatal: false)
  super
  symlink_ld_so
  setup_preferred_gcc_libs
end

#setup_preferred_gcc_libs ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'extend/os/linux/install.rb', line 78

def setup_preferred_gcc_libs
  gcc_opt_prefix = HOMEBREW_PREFIX/"opt/#{OS::LINUX_PREFERRED_GCC_RUNTIME_FORMULA}"
  glibc_installed = (HOMEBREW_PREFIX/"opt/glibc/bin/ld.so").readable?

  return unless gcc_opt_prefix.readable?

  if glibc_installed
    ld_so_conf_d = HOMEBREW_PREFIX/"etc/ld.so.conf.d"
    unless ld_so_conf_d.exist?
      ld_so_conf_d.mkpath
      FileUtils.chmod "go-w", ld_so_conf_d
    end

    # Add gcc to ld search paths
    ld_gcc_conf = ld_so_conf_d/"50-homebrew-preferred-gcc.conf"
    ld_gcc_conf_content = <<~EOS
      # This file is generated by Homebrew. Do not modify.
      #{gcc_opt_prefix}/lib/gcc/current
    EOS

    if !ld_gcc_conf.exist? || (ld_gcc_conf.read != ld_gcc_conf_content)
      ld_gcc_conf.atomic_write ld_gcc_conf_content
      FileUtils.chmod "u=rw,go-wx", ld_gcc_conf

      FileUtils.rm_f HOMEBREW_PREFIX/"etc/ld.so.cache"
      ::Kernel.system HOMEBREW_PREFIX/"opt/glibc/sbin/ldconfig"
    end
  else
    ::Kernel.odie "#{HOMEBREW_PREFIX}/lib does not exist!" unless (HOMEBREW_PREFIX/"lib").readable?
  end

  GCC_RUNTIME_LIBS.each do |library|
    gcc_library_symlink = HOMEBREW_PREFIX/"lib/#{library}"

    if glibc_installed
      # Remove legacy symlinks
      FileUtils.rm gcc_library_symlink if gcc_library_symlink.symlink?
    else
      gcc_library = gcc_opt_prefix/"lib/gcc/current/#{library}"
      # Skip if the link target doesn't exist.
      next unless gcc_library.readable?

      # Also skip if the symlink already exists.
      next if gcc_library_symlink.readable? && (gcc_library_symlink.readlink == gcc_library)

      FileUtils.ln_sf gcc_library, gcc_library_symlink
    end
  end
end

#symlink_ld_so ⇒ Object

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning. 



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# File 'extend/os/linux/install.rb', line 59

def symlink_ld_so
  brew_ld_so = HOMEBREW_PREFIX/"lib/ld.so"

  ld_so = HOMEBREW_PREFIX/"opt/glibc/bin/ld.so"
  unless ld_so.readable?
    ld_so = DYNAMIC_LINKERS.find { |s| File.executable? s }
    if ld_so.blank?
      ::Kernel.raise "Unable to locate the system's dynamic linker" unless brew_ld_so.readable?

      return
    end
  end

  return if brew_ld_so.readable? && (brew_ld_so.readlink == ld_so)

  FileUtils.mkdir_p HOMEBREW_PREFIX/"lib"
  FileUtils.ln_sf ld_so, brew_ld_so
end