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class Keg
def fix_dynamic_linkage
mach_o_files.each do |file|
file.ensure_writable do
change_dylib_id(dylib_id_for(file), file) if file.dylib?
each_install_name_for(file) do |bad_name|
# Don't fix absolute paths unless they are rooted in the build directory
next if bad_name.start_with?("/") &&
!bad_name.start_with?(HOMEBREW_TEMP.to_s) &&
!bad_name.start_with?(HOMEBREW_TEMP.realpath.to_s)
new_name = fixed_name(file, bad_name)
change_install_name(bad_name, new_name, file) unless new_name == bad_name
end
end
end
generic_fix_dynamic_linkage
end
def relocate_dynamic_linkage(relocation)
mach_o_files.each do |file|
file.ensure_writable do
if file.dylib?
id = dylib_id_for(file).sub(relocation.old_prefix, relocation.new_prefix)
change_dylib_id(id, file)
end
each_install_name_for(file) do |old_name|
if old_name.start_with? relocation.old_cellar
new_name = old_name.sub(relocation.old_cellar, relocation.new_cellar)
elsif old_name.start_with? relocation.old_prefix
new_name = old_name.sub(relocation.old_prefix, relocation.new_prefix)
end
change_install_name(old_name, new_name, file) if new_name
end
end
end
end
# Detects the C++ dynamic libraries in place, scanning the dynamic links
# of the files within the keg.
# Note that this doesn't attempt to distinguish between libstdc++ versions,
# for instance between Apple libstdc++ and GNU libstdc++
def detect_cxx_stdlibs(options = {})
skip_executables = options.fetch(:skip_executables, false)
results = Set.new
mach_o_files.each do |file|
next if file.mach_o_executable? && skip_executables
dylibs = file.dynamically_linked_libraries
results << :libcxx unless dylibs.grep(/libc\+\+.+\.dylib/).empty?
results << :libstdcxx unless dylibs.grep(/libstdc\+\+.+\.dylib/).empty?
end
results.to_a
end
# If file is a dylib or bundle itself, look for the dylib named by
# bad_name relative to the lib directory, so that we can skip the more
# expensive recursive search if possible.
def fixed_name(file, bad_name)
if bad_name.start_with? PREFIX_PLACEHOLDER
bad_name.sub(PREFIX_PLACEHOLDER, HOMEBREW_PREFIX)
elsif bad_name.start_with? CELLAR_PLACEHOLDER
bad_name.sub(CELLAR_PLACEHOLDER, HOMEBREW_CELLAR)
elsif (file.dylib? || file.mach_o_bundle?) && (file.parent + bad_name).exist?
"@loader_path/#{bad_name}"
elsif file.mach_o_executable? && (lib + bad_name).exist?
"#{lib}/#{bad_name}"
elsif (abs_name = find_dylib(bad_name)) && abs_name.exist?
abs_name.to_s
else
opoo "Could not fix #{bad_name} in #{file}"
bad_name
end
end
def each_install_name_for(file, &block)
dylibs = file.dynamically_linked_libraries
dylibs.reject! { |fn| fn =~ /^@(loader_|executable_|r)path/ }
dylibs.each(&block)
end
def dylib_id_for(file)
# The new dylib ID should have the same basename as the old dylib ID, not
# the basename of the file itself.
basename = File.basename(file.dylib_id)
relative_dirname = file.dirname.relative_path_from(path)
(opt_record/relative_dirname/basename).to_s
end
# Matches framework references like `XXX.framework/Versions/YYY/XXX` and
# `XXX.framework/XXX`, both with or without a slash-delimited prefix.
FRAMEWORK_RX = %r{(?:^|/)(([^/]+)\.framework/(?:Versions/[^/]+/)?\2)$}
def find_dylib_suffix_from(bad_name)
if (framework = bad_name.match(FRAMEWORK_RX))
framework[1]
else
File.basename(bad_name)
end
end
def find_dylib(bad_name)
return unless lib.directory?
suffix = "/#{find_dylib_suffix_from(bad_name)}"
lib.find { |pn| break pn if pn.to_s.end_with?(suffix) }
end
def mach_o_files
hardlinks = Set.new
mach_o_files = []
path.find do |pn|
next if pn.symlink? || pn.directory?
next unless pn.dylib? || pn.mach_o_bundle? || pn.mach_o_executable?
# if we've already processed a file, ignore its hardlinks (which have the same dev ID and inode)
# this prevents relocations from being performed on a binary more than once
next unless hardlinks.add? [pn.stat.dev, pn.stat.ino]
mach_o_files << pn
end
mach_o_files
end
def recursive_fgrep_args
# Don't recurse into symlinks; the man page says this is the default, but
# it's wrong. -O is a BSD-grep-only option.
"-lrO"
end
def self.file_linked_libraries(file, string)
# Check dynamic library linkage. Importantly, do not perform for static
# libraries, which will falsely report "linkage" to themselves.
if file.mach_o_executable? || file.dylib? || file.mach_o_bundle?
file.dynamically_linked_libraries.select { |lib| lib.include? string }
else
[]
end
end
end
|
