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require 'mkmf'
if `which make`.strip.empty?
STDERR.puts "\n\n"
STDERR.puts "***************************************************************************************"
STDERR.puts "*************** make required (apt-get install make build-essential) =( ***************"
STDERR.puts "***************************************************************************************"
exit(1)
end
##
# ICU dependency
#
ldflags = cppflags = nil
if RbConfig::CONFIG["host_os"] =~ /darwin/
begin
brew_prefix = `brew --prefix icu4c`.chomp
ldflags = "#{brew_prefix}/lib"
cppflags = "#{brew_prefix}/include"
pkg_conf = "#{brew_prefix}/lib/pkgconfig"
# pkg_config should be less error prone than parsing compiler
# commandline options, but we need to set default ldflags and cpp flags
# in case the user doesn't have pkg-config installed
ENV['PKG_CONFIG_PATH'] ||= pkg_conf
rescue
end
end
dir_config 'icu', cppflags, ldflags
pkg_config("icu-i18n")
pkg_config("icu-io")
pkg_config("icu-uc")
unless have_library 'icui18n' and have_header 'unicode/ucnv.h'
STDERR.puts "\n\n"
STDERR.puts "***************************************************************************************"
STDERR.puts "*********** icu required (brew install icu4c or apt-get install libicu-dev) ***********"
STDERR.puts "***************************************************************************************"
exit(1)
end
have_library 'z' or abort 'libz missing'
have_library 'icuuc' or abort 'libicuuc missing'
have_library 'icudata' or abort 'libicudata missing'
$CFLAGS << ' -Wall -funroll-loops'
$CFLAGS << ' -Wextra -O0 -ggdb3' if ENV['DEBUG']
minimal_program = <<~SRC
#include <unicode/translit.h>
int main() { return 0; }
SRC
# Pass -x c++ to force gcc to compile the test program
# as C++ (as it will end in .c by default).
compile_options = +"-x c++"
icu_requires_version_flag = checking_for("icu that requires explicit C++ version flag") do
!try_compile(minimal_program, compile_options)
end
if icu_requires_version_flag
abort "Cannot compile icu with your compiler: recent versions require C++17 support." unless %w[c++20 c++17 c++11 c++0x].any? do |std|
checking_for("icu that compiles with #{std} standard") do
flags = compile_options + " -std=#{std}"
if try_compile(minimal_program, flags)
$CPPFLAGS << flags
true
end
end
end
end
def libflag_to_filename(ldflag)
case ldflag
when /\A-l(.+)/
"lib#{Regexp.last_match(1)}.#{$LIBEXT}"
end
end
def resolve_static_library(libflag, dirs)
filename = libflag_to_filename(libflag)
dir = dirs.find { |path| File.exist?(File.join(path, filename)) }
raise "Unable to find #{filename} in #{dirs}" unless dir
File.join(dir, filename)
end
def substitute_static_libs(packages)
packages.each do |pkg|
unless pkg_config(pkg)
message = <<~MSG
Unable to run `pkg-config #{pkg}`.
Check that PKG_CONFIG_PATH includes #{pkg}.pc (or unset it if it's already set).
Current environment:
PKG_CONFIG_PATH=#{ENV['PKG_CONFIG_PATH']}
MSG
raise message
end
end
# First, find all the -l<lib> flags added by pkg-config. We want to drop
# these dynamically linked libraries and substitute them with the static libraries.
libflags = packages.map do |pkg|
pkg_config(pkg, 'libs-only-l')&.strip&.split(' ')
end.flatten.uniq
# To find where the static libraries live, we need to search the
# library paths given by the -L flag from pkg-config.
lib_paths = packages.map do |pkg|
include_path = pkg_config(pkg, 'libs-only-L')&.strip
include_path&.split(' ')&.map { |lib| lib.gsub(/^-L/, '') }
end.flatten.uniq
# Drop the -l<lib> flags and add in the static libraries.
new_libs = $libs.shellsplit
new_libs.reject! { |arg| libflags.include?(arg) }
libflags.each { |flag| new_libs << resolve_static_library(flag, lib_paths) }
$libs = new_libs.uniq.shelljoin
end
static_p = enable_config('static', false)
message "Static linking is #{static_p ? 'enabled' : 'disabled'}.\n"
if static_p
$CXXFLAGS << ' -fPIC'
ENV['PKG_CONFIG_ALLOW_SYSTEM_LIBS'] = '1'
substitute_static_libs(%w[icu-i18n icu-io icu-uc])
end
create_makefile 'charlock_holmes/charlock_holmes'
|
