Top Level Namespace

Defined Under Namespace

Modules: PQCrypto

Constant Summary collapse

VENDOR_ONLY_CFLAGS = 
"-Wno-unused-parameter -Wno-unused-function -Wno-strict-prototypes -Wno-pedantic -Wno-c23-extensions -Wno-undef"
SANITIZE = 
ENV["PQCRYPTO_SANITIZE"]
NATIVE_ASM = 
env_bool("PQCRYPTO_NATIVE_ASM", native_asm_supported_by_default?)
NATIVE_ARITH = 
env_bool("PQCRYPTO_NATIVE_ARITH", NATIVE_ASM)
NATIVE_FIPS202 = 
env_bool("PQCRYPTO_NATIVE_FIPS202", NATIVE_ASM)
X86_VENDOR_ARCH_FLAGS = 
"-mavx2 -mbmi -mbmi2 -mpopcnt -maes -mssse3 -msse4.1 -msse4.2"
VENDOR_C_ARCH_FLAGS = 
+""
VENDOR_ASM_ARCH_FLAGS = 
+""

Instance Method Summary collapse

Instance Method Details

#aarch64_host? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/pqcrypto/extconf.rb', line 59

def aarch64_host?
  host_cpu =~ /\A(?:arm64|aarch64)\z/i
end

#configure_compiler_environment ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 311

def configure_compiler_environment
  prefix = resolve_openssl_prefix
  if prefix
    configure_openssl_prefix(prefix, source: "prefix")
    return
  end

  pkg = openssl_pkg_config
  if pkg && pkg[:incdir] && pkg[:libdir]
    configure_openssl_paths(pkg[:incdir], pkg[:libdir], crypto_lib: pkg[:crypto_lib])
    puts "OpenSSL pkg-config: #{pkg[:version]}"
    puts "OpenSSL include dir: #{pkg[:incdir]}"
    puts "OpenSSL library dir: #{pkg[:libdir]}"
    puts "OpenSSL libcrypto: #{pkg[:crypto_lib]}"
    return
  end

  if pkg && pkg[:version]
    if openssl_version_at_least_3?(pkg[:version])
      puts "Ignoring incomplete pkg-config OpenSSL #{pkg[:version]}; headers or libraries were not found"
    else
      puts "Ignoring pkg-config OpenSSL #{pkg[:version]}; OpenSSL 3.0 or later is required"
    end
  else
    puts "OpenSSL pkg-config: unavailable"
  end

  conventional = ["/usr/local", "/usr"].find { |candidate| openssl_prefix_usable?(candidate) }
  if conventional
    configure_openssl_prefix(conventional, source: "system prefix")
    return
  end

  puts "OpenSSL prefix: (none resolved; using compiler defaults)"
end

#configure_openssl! ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 420

def configure_openssl!
  configure_compiler_environment

  abort "openssl/evp.h is required" unless have_header("openssl/evp.h")
  abort "openssl/rand.h is required" unless have_header("openssl/rand.h")
  abort "openssl/crypto.h is required" unless have_header("openssl/crypto.h")
  abort "openssl/x509.h is required" unless have_header("openssl/x509.h")
  abort "openssl/pkcs12.h is required" unless have_header("openssl/pkcs12.h")

  version_check = <<~SRC
    #include <openssl/crypto.h>
    #include <openssl/opensslv.h>
    #if OPENSSL_VERSION_NUMBER < 0x30000000L
    #error "OpenSSL 3.0 or later is required"
    #endif
    int main(void) {
        return (int)OPENSSL_version_major();
    }
  SRC
  abort <<~MSG unless try_link(version_check)
    OpenSSL 3.0 or later is required, but the compiler and linker did not find
    a consistent OpenSSL 3 headers + libcrypto pair. See mkmf.log for the exact
    include paths, library paths, and linker error.

    macOS with Homebrew:
      brew install openssl@3
      OPENSSL_ROOT_DIR="$(brew --prefix openssl@3)" bundle exec rake clean compile

    Debian/Ubuntu:
      sudo apt-get install libssl-dev pkg-config
      pkg-config --modversion openssl   # must report 3.x

    If an old Ruby toolchain injects OpenSSL 1.1 through CPPFLAGS or
    PKG_CONFIG_PATH, inspect mkmf.log and point the build at OpenSSL 3.
  MSG

  sha3_check = <<~SRC
    #include <openssl/evp.h>
    int main(void) {
        const EVP_MD *md = EVP_sha3_256();
        return md == NULL ? 1 : 0;
    }
  SRC
  abort "OpenSSL SHA3-256 is required (X-Wing combiner)" unless try_link(sha3_check)

  shake_check = <<~SRC
    #include <openssl/evp.h>
    int main(void) {
        const EVP_MD *md = EVP_shake256();
        return md == NULL ? 1 : 0;
    }
  SRC
  abort "OpenSSL SHAKE256 is required (X-Wing key expansion / ML-DSA streaming mu)" unless try_link(shake_check)

  $CFLAGS << " -DHAVE_OPENSSL_EVP_H -DHAVE_OPENSSL_RAND_H"
end

#configure_openssl_paths(incdir, libdir, crypto_lib:) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 276

def configure_openssl_paths(incdir, libdir, crypto_lib:)
  if defined?($configure_args) && $configure_args
    $configure_args["--with-openssl-dir"] = File.dirname(incdir)
    $configure_args["--with-openssl-include"] = incdir
    $configure_args["--with-openssl-lib"] = libdir
  end

  remove_competing_openssl_headers!(incdir)

  $INCFLAGS = "-I#{incdir} #{$INCFLAGS}".strip
  $CPPFLAGS = "-I#{incdir} #{$CPPFLAGS}".strip
  $LIBPATH.unshift(libdir) unless $LIBPATH.include?(libdir)

  selected_libs = [crypto_lib].map { |path| Shellwords.escape(path) }.join(" ")
  $LOCAL_LIBS = "#{selected_libs} #{$LOCAL_LIBS}".strip

  unless host_os =~ /mswin|mingw|cygwin/i || libdir.start_with?("/usr/lib")
    $LDFLAGS = "-Wl,-rpath,#{Shellwords.escape(libdir)} #{$LDFLAGS}".strip
  end
end

#configure_openssl_prefix(prefix, source:) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 297

def configure_openssl_prefix(prefix, source:)
  incdir = File.join(prefix, "include")
  libdir = openssl_library_dirs(prefix).find do |dir|
    openssl_library_present?(dir, "crypto")
  end
  crypto_lib = openssl_library_file(libdir, "crypto")

  configure_openssl_paths(incdir, libdir, crypto_lib: crypto_lib)
  puts "OpenSSL #{source}: #{prefix}"
  puts "OpenSSL include dir: #{incdir}"
  puts "OpenSSL library dir: #{libdir}"
  puts "OpenSSL libcrypto: #{crypto_lib}"
end

#configure_ruby_c_api! ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 414

def configure_ruby_c_api!
  abort "ruby/thread.h is required" unless have_header("ruby/thread.h")
  abort "rb_thread_call_without_gvl is required" unless have_func("rb_thread_call_without_gvl", "ruby/thread.h")
  abort "rb_nogvl is required" unless have_func("rb_nogvl", "ruby/thread.h")
end

#env_bool(name, default) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 73

def env_bool(name, default)
  value = ENV[name]
  return default if value.nil? || value.strip.empty? || value.strip.downcase == "auto"

  case value.strip.downcase
  when "1", "true", "yes", "on"
    true
  when "0", "false", "no", "off"
    false
  else
    abort "Invalid #{name}=#{value.inspect}; use 1, 0, true, false, or auto"
  end
end

#explicit_openssl_prefix ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 147

def explicit_openssl_prefix
  %w[OPENSSL_ROOT_DIR OPENSSL_DIR].each do |var|
    value = ENV[var]
    next if value.nil? || value.strip.empty?

    prefix = File.expand_path(value.strip)
    abort <<~MSG unless openssl_prefix_usable?(prefix)
      #{var}=#{value.inspect} does not point to a complete OpenSSL installation.

      Expected OpenSSL headers under:
        #{File.join(prefix, "include", "openssl")}

      And libcrypto under lib, lib64, or a Linux multiarch lib directory.
    MSG

    return prefix
  end

  nil
end

#find_vendor_dir ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 392

def find_vendor_dir
  candidates = [
    File.join(__dir__, "vendor"),
    File.expand_path("../../ext/pqcrypto/vendor", __dir__),
    File.join(Dir.pwd, "ext", "pqcrypto", "vendor")
  ]

  dir = __dir__
  6.times do
    candidates << File.join(dir, "ext", "pqcrypto", "vendor")
    dir = File.dirname(dir)
  end

  candidates.map! { |path| File.expand_path(path) }
  candidates.uniq!

  primary = File.expand_path(File.join(__dir__, "vendor"))
  run_vendor_script!(primary) unless native_vendor_ready?(primary)

  candidates.find { |path| native_vendor_ready?(path) }
end

#generate_version_header! ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 10

def generate_version_header!
  version = PQCrypto::VERSION
  unless version.match?(/\A[0-9A-Za-z][0-9A-Za-z._+-]*\z/)
    abort "Invalid PQCrypto::VERSION for C header: #{version.inspect}"
  end

  header = File.join(__dir__, "pqcrypto_version.h")
  File.write(header, <<~C)
    /* Generated by extconf.rb from lib/pq_crypto/version.rb. Do not edit. */
    #ifndef PQCRYPTO_VERSION_H
    #define PQCRYPTO_VERSION_H

    #define PQCRYPTO_VERSION #{version.dump}

    #endif
  C
end

#host_cpu ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 51

def host_cpu
  RbConfig::CONFIG.fetch("host_cpu", "")
end

#host_os ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 55

def host_os
  RbConfig::CONFIG.fetch("host_os", "")
end

#include_paths_from_flags(flags) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 221

def include_paths_from_flags(flags)
  tokens = Shellwords.split(flags.to_s)
  paths = []
  index = 0

  while index < tokens.length
    token = tokens[index]

    case token
    when "-I", "-isystem"
      paths << tokens[index + 1] if tokens[index + 1]
      index += 2
      next
    when /\A-I(.+)\z/
      paths << Regexp.last_match(1)
    when /\A-isystem(.+)\z/
      paths << Regexp.last_match(1)
    end

    index += 1
  end

  paths
rescue ArgumentError
  []
end

#inject_native_sources!(config) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 534

def inject_native_sources!(config)
  makefile = File.read("Makefile")

  vendor_objects = []
  build_rules = []

  [
    [:mlkem, "512", config[:mlkem_c], true],
    [:mlkem, "768", config[:mlkem_c], false],
    [:mlkem, "1024", config[:mlkem_c], false],
    [:mldsa, "44", config[:mldsa_c], true],
    [:mldsa, "65", config[:mldsa_c], false],
    [:mldsa, "87", config[:mldsa_c], false]
  ].each do |kind, level, source, shared|
    object = "pqnative_#{kind}_#{level}.o"
    flags = native_flags(kind, level, shared: shared)
    vendor_objects << object
    build_rules << <<~RULE
      #{object}: #{source}
      	$(ECHO) compiling #{source} [#{kind}-#{level}]
      	$(Q) $(CC) $(INCFLAGS) $(CPPFLAGS) $(CFLAGS) $(CCDLFLAGS) #{VENDOR_ONLY_CFLAGS} #{VENDOR_C_ARCH_FLAGS} #{flags} $(COUTFLAG)$@ -c $(CSRCFLAG)$<
    RULE
  end

  if NATIVE_ARITH || NATIVE_FIPS202
    [
      [:mlkem, "512", config[:mlkem_asm], true],
      [:mlkem, "768", config[:mlkem_asm], false],
      [:mlkem, "1024", config[:mlkem_asm], false],
      [:mldsa, "44", config[:mldsa_asm], true],
      [:mldsa, "65", config[:mldsa_asm], false],
      [:mldsa, "87", config[:mldsa_asm], false]
    ].each do |kind, level, source, shared|
      next unless File.exist?(source)

      object = "pqnative_#{kind}_#{level}_asm.o"
      flags = native_flags(kind, level, shared: shared)
      vendor_objects << object
      build_rules << <<~RULE
        #{object}: #{source}
        	$(ECHO) assembling #{source} [#{kind}-#{level}]
        	$(Q) $(CC) $(INCFLAGS) $(CPPFLAGS) $(CFLAGS) $(CCDLFLAGS) #{VENDOR_ONLY_CFLAGS} #{VENDOR_ASM_ARCH_FLAGS} #{flags} $(COUTFLAG)$@ -c $(CSRCFLAG)$<
      RULE
    end
  end

  objects_line = makefile.lines.find { |line| line.start_with?("OBJS = ") }
  raise "Could not find OBJS line in generated Makefile" unless objects_line

  makefile.sub!(objects_line, objects_line.chomp + " #{vendor_objects.join(' ')}\n")

  unless makefile.include?("# vendored pq-code-package objects")
    rules_block = "\n# vendored pq-code-package objects\n" + build_rules.join("\n") + "\n"
    anchor = "$(OBJS): $(HDRS) $(ruby_headers)\n"
    raise "Could not find OBJS dependency anchor in generated Makefile" unless makefile.include?(anchor)

    makefile.sub!(anchor, anchor + rules_block)
  end

  File.write("Makefile", makefile)
end

#native_asm_supported_by_default? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/pqcrypto/extconf.rb', line 67

def native_asm_supported_by_default?
  return false if host_os =~ /mswin|mingw|cygwin/i

  aarch64_host?
end

#native_flags(kind, level, shared:) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 520

def native_flags(kind, level, shared:)
  prefix = kind == :mlkem ? "MLK" : "MLD"
  ns = kind == :mlkem ? "pqcr_mlkem" : "pqcr_mldsa"
  flags = []
  flags << "-D#{prefix}_CONFIG_MULTILEVEL_BUILD"
  flags << "-D#{prefix}_CONFIG_PARAMETER_SET=#{level}"
  flags << "-D#{prefix}_CONFIG_NAMESPACE_PREFIX=#{ns}"
  flags << "-D#{prefix}_CONFIG_NO_SUPERCOP"
  flags << (shared ? "-D#{prefix}_CONFIG_MULTILEVEL_WITH_SHARED" : "-D#{prefix}_CONFIG_MULTILEVEL_NO_SHARED")
  flags << "-D#{prefix}_CONFIG_USE_NATIVE_BACKEND_ARITH" if NATIVE_ARITH
  flags << "-D#{prefix}_CONFIG_USE_NATIVE_BACKEND_FIPS202" if NATIVE_FIPS202
  flags.join(" ")
end

#native_vendor_config(vendor_dir) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 481

def native_vendor_config(vendor_dir)
  abort <<~MSG unless vendor_dir
    PQ Code Package vendored sources are required.

    Expected:
      ext/pqcrypto/vendor/mlkem-native/mlkem/mlkem_native.c
      ext/pqcrypto/vendor/mldsa-native/mldsa/mldsa_native.c

    Run:
      bundle exec rake vendor
  MSG

  mlkem_dir = File.join(vendor_dir, "mlkem-native", "mlkem")
  mldsa_dir = File.join(vendor_dir, "mldsa-native", "mldsa")
  mlkem_c = File.join(mlkem_dir, "mlkem_native.c")
  mldsa_c = File.join(mldsa_dir, "mldsa_native.c")

  missing = [mlkem_c, mldsa_c].reject { |path| File.exist?(path) }
  abort <<~MSG unless missing.empty?
    Missing PQ Code Package native source files:
      #{missing.join("\n  ")}

    This build intentionally has no PQClean fallback. Auto-vendoring did not
    produce the required files. Vendor mlkem-native and mldsa-native, then rebuild.
  MSG

  include_dirs = [__dir__, mlkem_dir, mldsa_dir, *recursive_include_dirs(mlkem_dir), *recursive_include_dirs(mldsa_dir)].uniq
  include_dirs.each { |dir| $CPPFLAGS << " -I#{dir}" }

  {
    mlkem_dir: mlkem_dir,
    mldsa_dir: mldsa_dir,
    mlkem_c: mlkem_c,
    mldsa_c: mldsa_c,
    mlkem_asm: File.join(mlkem_dir, "mlkem_native_asm.S"),
    mldsa_asm: File.join(mldsa_dir, "mldsa_native_asm.S")
  }
end

#native_vendor_ready?(vendor_dir) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/pqcrypto/extconf.rb', line 354

def native_vendor_ready?(vendor_dir)
  File.exist?(File.join(vendor_dir, ".vendored")) &&
    native_vendor_sources_for(vendor_dir).all? { |path| File.exist?(path) }
end

#native_vendor_sources_for(vendor_dir) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 347

def native_vendor_sources_for(vendor_dir)
  [
    File.join(vendor_dir, "mlkem-native", "mlkem", "mlkem_native.c"),
    File.join(vendor_dir, "mldsa-native", "mldsa", "mldsa_native.c")
  ]
end

#normalize_existing_path(path) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 215

def normalize_existing_path(path)
  File.realpath(path)
rescue Errno::ENOENT
  File.expand_path(path)
end

#openssl_library_dirs(prefix) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 106

def openssl_library_dirs(prefix)
  dirs = Dir.glob(File.join(prefix, "lib", "*-linux-gnu"))
  dirs.concat([File.join(prefix, "lib64"), File.join(prefix, "lib")])
  dirs.select { |dir| File.directory?(dir) }.uniq
end

#openssl_library_file(dir, name) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 112

def openssl_library_file(dir, name)
  candidates = [
    File.join(dir, "lib#{name}.so.3"),
    *Dir.glob(File.join(dir, "lib#{name}.so.3.*")).sort,
    File.join(dir, "lib#{name}.so"),
    File.join(dir, "lib#{name}.3.dylib"),
    *Dir.glob(File.join(dir, "lib#{name}.3.*.dylib")).sort,
    File.join(dir, "lib#{name}.dylib"),
    File.join(dir, "lib#{name}.a"),
    File.join(dir, "lib#{name}.dll.a"),
    File.join(dir, "#{name}.lib")
  ]

  path = candidates.find { |candidate| File.file?(candidate) }
  path && File.realpath(path)
rescue Errno::ENOENT
  nil
end

#openssl_library_present?(dir, name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/pqcrypto/extconf.rb', line 131

def openssl_library_present?(dir, name)
  !openssl_library_file(dir, name).nil?
end

#openssl_pkg_config ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 191

def openssl_pkg_config
  return nil unless find_executable("pkg-config")

  version = `pkg-config --modversion openssl 2>/dev/null`.strip
  return nil unless $?.success?
  return nil if version.empty?
  return { version: version } unless openssl_version_at_least_3?(version)

  incdir = pkg_config_value("includedir")
  libdir = pkg_config_value("libdir")
  return { version: version } unless incdir && libdir
  return { version: version } unless File.exist?(File.join(incdir, "openssl", "opensslv.h"))
  crypto_lib = openssl_library_file(libdir, "crypto")
  return { version: version } unless crypto_lib

  { version: version, incdir: incdir, libdir: libdir, crypto_lib: crypto_lib }
end

#openssl_prefix_usable?(prefix) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/pqcrypto/extconf.rb', line 135

def openssl_prefix_usable?(prefix)
  return false if prefix.nil?

  prefix = prefix.strip
  return false if prefix.empty?
  return false unless File.exist?(File.join(prefix, "include", "openssl", "opensslv.h"))

  openssl_library_dirs(prefix).any? do |dir|
    openssl_library_present?(dir, "crypto")
  end
end

#openssl_version_at_least_3?(version) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/pqcrypto/extconf.rb', line 209

def openssl_version_at_least_3?(version)
  Gem::Version.new(version) >= Gem::Version.new("3.0.0")
rescue ArgumentError
  false
end

#pkg_config_value(variable) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 183

def pkg_config_value(variable)
  value = `pkg-config --variable=#{variable} openssl 2>/dev/null`.strip
  return nil unless $?.success?
  return nil if value.empty?

  File.expand_path(value)
end

#recursive_include_dirs(root) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 477

def recursive_include_dirs(root)
  Dir.glob(File.join(root, "**", "*")).select { |p| File.directory?(p) }.map { |p| File.expand_path(p) }
end

#remove_competing_openssl_headers!(selected_incdir) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 257

def remove_competing_openssl_headers!(selected_incdir)
  selected = normalize_existing_path(selected_incdir)
  flag_values = [$INCFLAGS, $CPPFLAGS, $CFLAGS]

  competing = flag_values
    .flat_map { |flags| include_paths_from_flags(flags) }.uniq.select do |path|
      next false unless File.file?(File.join(path, "openssl", "opensslv.h"))

      normalize_existing_path(path) != selected
    end

  competing.each do |path|
    $INCFLAGS = strip_include_path($INCFLAGS, path)
    $CPPFLAGS = strip_include_path($CPPFLAGS, path)
    $CFLAGS = strip_include_path($CFLAGS, path)
    puts "Ignoring competing OpenSSL headers: #{path}"
  end
end

#resolve_openssl_prefix ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 168

def resolve_openssl_prefix
  explicit = explicit_openssl_prefix
  return explicit if explicit

  candidates = []
  if find_executable("brew")
    %w[openssl@3 openssl].each do |formula|
      prefix = `brew --prefix #{formula} 2>/dev/null`.strip
      candidates << prefix unless prefix.empty?
    end
  end
  candidates.concat(["/opt/homebrew/opt/openssl@3", "/usr/local/opt/openssl@3"])
  candidates.uniq.find { |prefix| openssl_prefix_usable?(prefix) }
end

#run_vendor_script!(vendor_dir) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 363

def run_vendor_script!(vendor_dir)
  abort <<~MSG if ENV["PQCRYPTO_AUTO_VENDOR"] != "1"
    PQ Code Package vendored sources are missing.

    Expected:
      #{native_vendor_sources_for(vendor_dir).join("\n  ")}

    The vendor tree is committed to the repository and shipped with the gem.
    If it is missing, the source tree is incomplete or corrupted.

    To fetch upstream sources at the pinned commits run:
      ruby script/vendor_libs.rb

    Or to allow extconf.rb to do this for you set PQCRYPTO_AUTO_VENDOR=1.
  MSG

  script = vendor_script_path
  abort "PQ Code Package vendored sources are missing and script/vendor_libs.rb was not packaged." unless File.exist?(script)

  puts "PQ Code Package native sources are missing; vendoring now (PQCRYPTO_AUTO_VENDOR=1)..."
  ok = system(RbConfig.ruby, script)
  abort <<~MSG unless ok
    Failed to vendor PQ Code Package native sources.

    This build intentionally has no PQClean fallback. Install git/network access or
    vendor mlkem-native and mldsa-native before installing the gem.
  MSG
end

#strip_include_path(flags, path) ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 248

def strip_include_path(flags, path)
  escaped = Regexp.escape(path)

  flags.to_s
    .gsub(/(?:\A|\s)-I\s*#{escaped}(?=\s|\z)/, " ")
    .gsub(/(?:\A|\s)-isystem\s*#{escaped}(?=\s|\z)/, " ")
    .strip
end

#vendor_script_path ⇒ Object 



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# File 'ext/pqcrypto/extconf.rb', line 359

def vendor_script_path
  File.expand_path("../../script/vendor_libs.rb", __dir__)
end

#x86_64_host? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/pqcrypto/extconf.rb', line 63

def x86_64_host?
  host_cpu =~ /\A(?:x86_64|amd64|x64)\z/i
end