Add workaround for Windows link order issues with pkgconf

On systems where pkgconf v1.9.3 is used for pkg-config, the output of
`pkg-config --static --libs` is incorrect, resulting in build failures
(pkgconf/pkgconf#268). This commit fixes
the issue by hard-coding the abseil libraries needed to link the
extension properly.

ext/re2/extconf.rb

@@ -344,6 +344,69 @@ def build_with_system_libraries
  build_extension
 end
 
+# pkgconf v1.9.3 on Windows incorrectly sorts the output of `pkg-config
+# --libs --static`, resulting in build failures: https://github.com/pkgconf/pkgconf/issues/268.
+# To work around the issue, store the correct order of abseil flags here and add them manually
+# for Windows.
+ABSL_LDFLAGS = %w[
+ -labsl_flags
+ -labsl_flags_internal
+ -labsl_flags_marshalling
+ -labsl_flags_reflection
+ -labsl_flags_private_handle_accessor
+ -labsl_flags_commandlineflag
+ -labsl_flags_commandlineflag_internal
+ -labsl_flags_config
+ -labsl_flags_program_name
+ -labsl_cord
+ -labsl_cordz_info
+ -labsl_cord_internal
+ -labsl_cordz_functions
+ -labsl_cordz_handle
+ -labsl_crc_cord_state
+ -labsl_crc32c
+ -labsl_crc_internal
+ -labsl_crc_cpu_detect
+ -labsl_hash
+ -labsl_city
+ -labsl_bad_variant_access
+ -labsl_low_level_hash
+ -labsl_raw_hash_set
+ -labsl_hashtablez_sampler
+ -labsl_exponential_biased
+ -labsl_bad_optional_access
+ -labsl_str_format_internal
+ -labsl_synchronization
+ -labsl_graphcycles_internal
+ -labsl_stacktrace
+ -labsl_symbolize
+ -labsl_debugging_internal
+ -labsl_demangle_internal
+ -labsl_malloc_internal
+ -labsl_time
+ -labsl_civil_time
+ -labsl_strings
+ -labsl_strings_internal
+ -labsl_base
+ -labsl_spinlock_wait
+ -labsl_int128
+ -labsl_throw_delegate
+ -labsl_raw_logging_internal
+ -labsl_log_severity
+ -labsl_time_zone
+].freeze
+
+def add_static_ldflags(flags)
+ static_flags = flags.split
+
+ if MiniPortile.windows?
+ static_flags.each { |flag| append_ldflags(flag) unless ABSL_LDFLAGS.include?(flag) }
+ ABSL_LDFLAGS.each { |flag| append_ldflags(flag) }
+ else
+ static_flags.each { |flag| append_ldflags(flag) }
+ end
+end
+
 def build_with_vendored_libraries
  message "Building re2 using packaged libraries.\n"
 
@@ -383,8 +446,10 @@ def build_with_vendored_libraries
 
  # See https://bugs.ruby-lang.org/issues/18490, broken in Ruby 3.1 but fixed in Ruby 3.2.
  flags = xpopen(['pkg-config', '--libs', '--static', pc_file], err: %i[child out], &:read)
- flags.split.each { |flag| append_ldflags(flag) } if $?.success?
 
+ raise 'Unable to run pkg-config --libs --static' unless $?.success?
+
+ add_static_ldflags(flags)
  build_extension
 end