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Clang has fully implemented OpenMP support as of LLVM 3.7, so if OpenMP is required by a formula gcc is no longer the only choice of compiler. Clang should be preferred over gcc because using gcc meant linking against libstdc++, which is ABI incompatible with libc++. This may be unnoticeable for some users, but it causes other builds to fail, e.g. pstoedit when imagemagick was built with OpenMP. pstoedit is required for the octave formula, so for some users this could be a significant problem.
123 lines
3.3 KiB
Ruby
123 lines
3.3 KiB
Ruby
# @private
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class DevelopmentTools
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class << self
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def locate(tool)
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# Don't call tools (cc, make, strip, etc.) directly!
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# Give the name of the binary you look for as a string to this method
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# in order to get the full path back as a Pathname.
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(@locate ||= {}).fetch(tool) do |key|
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@locate[key] = if File.executable?(path = "/usr/bin/#{tool}")
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Pathname.new path
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# Homebrew GCCs most frequently; much faster to check this before xcrun
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elsif (path = HOMEBREW_PREFIX/"bin/#{tool}").executable?
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path
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end
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end
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end
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def installed?
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which("clang") || which("gcc")
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end
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def installation_instructions
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"Install Clang or brew install gcc"
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end
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alias custom_installation_instructions installation_instructions
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def default_cc
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cc = DevelopmentTools.locate "cc"
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begin
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cc.realpath.basename.to_s
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rescue
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nil
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end
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end
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def default_compiler
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if default_cc =~ /^gcc/
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:gcc
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else
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:clang
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end
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end
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def gcc_40_build_version
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@gcc_40_build_version ||=
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if (path = locate("gcc-4.0")) &&
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build_version = `#{path} --version 2>/dev/null`[/build (\d{4,})/, 1]
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Version.new build_version
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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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alias gcc_4_0_build_version gcc_40_build_version
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def gcc_42_build_version
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@gcc_42_build_version ||=
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begin
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gcc = locate("gcc-4.2") || HOMEBREW_PREFIX.join("opt/apple-gcc42/bin/gcc-4.2")
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if gcc.exist? && !gcc.realpath.basename.to_s.start_with?("llvm")&&
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build_version = `#{gcc} --version 2>/dev/null`[/build (\d{4,})/, 1]
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Version.new build_version
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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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end
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alias gcc_build_version gcc_42_build_version
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def clang_version
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@clang_version ||=
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if (path = locate("clang")) &&
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build_version = `#{path} --version`[/(?:clang|LLVM) version (\d\.\d)/, 1]
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Version.new build_version
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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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def clang_build_version
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@clang_build_version ||=
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if (path = locate("clang")) &&
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build_version = `#{path} --version`[/clang-(\d{2,})/, 1]
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Version.new build_version
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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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def llvm_clang_build_version
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@llvm_clang_build_version ||= if Tab.for_name "llvm"
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path = Formulary.factory("llvm").opt_prefix/"bin/clang"
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`#{path} --version`[/clang version (\d\.\d\.\d)/, 1]
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end
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end
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def non_apple_gcc_version(cc)
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(@non_apple_gcc_version ||= {}).fetch(cc) do
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path = HOMEBREW_PREFIX.join("opt", "gcc", "bin", cc)
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path = locate(cc) unless path.exist?
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version = if path &&
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build_version = `#{path} --version`[/gcc(?:-\d(?:\.\d)? \(.+\))? (\d\.\d\.\d)/, 1]
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Version.new build_version
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else
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Version::NULL
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end
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@non_apple_gcc_version[cc] = version
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end
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end
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def clear_version_cache
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@gcc_40_build_version = @gcc_42_build_version = nil
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@clang_version = @clang_build_version = nil
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@non_apple_gcc_version = {}
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end
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def tar_supports_xz?
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false
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end
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end
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end
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require "extend/os/development_tools"
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