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|
module CompilerConstants
GNU_GCC_VERSIONS = 3..9
GNU_GCC_REGEXP = /^gcc-(4\.[3-9])$/
end
class CompilerFailure
attr_reader :name
attr_rw :cause, :version
# Allows Apple compiler `fails_with` statements to keep using `build`
# even though `build` and `version` are the same internally
alias_method :build, :version
def self.for_standard standard
COLLECTIONS.fetch(standard) do
raise ArgumentError, "\"#{standard}\" is not a recognized standard"
end
end
def self.create(spec, &block)
# Non-Apple compilers are in the format fails_with compiler => version
if spec.is_a?(Hash)
_, major_version = spec.each { |e| break e }
name = "gcc-#{major_version}"
# so fails_with :gcc => '4.8' simply marks all 4.8 releases incompatible
version = "#{major_version}.999"
else
name = spec
version = 9999
end
new(name, version, &block)
end
def initialize(name, version, &block)
@name = name
@version = version
instance_eval(&block) if block_given?
end
def ===(compiler)
name == compiler.name && version >= compiler.version
end
def inspect
"#<#{self.class.name}: #{name} #{version}>"
end
MESSAGES = {
:cxx11 => "This compiler does not support C++11"
}
cxx11 = proc { cause MESSAGES[:cxx11] }
COLLECTIONS = {
:cxx11 => [
create(:gcc_4_0, &cxx11),
create(:gcc, &cxx11),
create(:llvm, &cxx11),
create(:clang) { build 425; cause MESSAGES[:cxx11] },
create(:gcc => "4.3", &cxx11),
create(:gcc => "4.4", &cxx11),
create(:gcc => "4.5", &cxx11),
create(:gcc => "4.6", &cxx11),
],
:openmp => [
create(:clang) { cause "clang does not support OpenMP" },
]
}
end
class CompilerSelector
include CompilerConstants
Compiler = Struct.new(:name, :version)
COMPILER_PRIORITY = {
:clang => [:clang, :gcc, :llvm, :gnu, :gcc_4_0],
:gcc => [:gcc, :llvm, :gnu, :clang, :gcc_4_0],
:llvm => [:llvm, :gcc, :gnu, :clang, :gcc_4_0],
:gcc_4_0 => [:gcc_4_0, :gcc, :llvm, :gnu, :clang],
}
def self.select_for(formula)
compilers = COMPILER_PRIORITY.fetch(MacOS.default_compiler)
new(formula, MacOS, compilers).compiler
end
attr_reader :formula, :failures, :versions, :compilers
def initialize(formula, versions, compilers)
@formula = formula
@failures = formula.compiler_failures
@versions = versions
@compilers = compilers
end
def compiler
find_compiler { |c| return c.name unless fails_with?(c) }
raise CompilerSelectionError.new(formula)
end
private
def find_compiler
compilers.each do |compiler|
case compiler
when :gnu
GNU_GCC_VERSIONS.reverse_each do |v|
name = "gcc-4.#{v}"
version = compiler_version(name)
yield Compiler.new(name, version) if version
end
else
version = compiler_version(compiler)
yield Compiler.new(compiler, version) if version
end
end
end
def fails_with?(compiler)
failures.any? { |failure| failure === compiler }
end
def compiler_version(name)
case name
when GNU_GCC_REGEXP
versions.non_apple_gcc_version(name)
else
versions.send("#{name}_build_version")
end
end
end
|
