From cd8f91092394a5e8b9f6885b5d1c603af7586e46 Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Fri, 29 Apr 2022 11:58:08 -0700
Subject: [PATCH 1/2] shared: add CMake based build rules for ICU

This adds a CMake based build for ICU. This is motivated by Windows
where we can avoid having to install a large number of tools in order to
build ICU by rewriting the build system in CMake.

This is a stopgap solution to the fact that ICU does not a CMake based
build. The project has been trying to switch to a CMake based for
nearly 4 years now [1].

This allows building ICU on Windows without having to setup and
configure cygwin to get access to autotools and without having to do
stage and coordinate the data build and the MSVC build. This also
allows the use of ninja to build which speeds up the build of ICU, as
well as enables easy cross-compilation. Additionally, this allows for a
more homogeneous build of Swift as nearly every other project builds
with CMake. There are a number of other parallel attempts to add an
out-of-tree CMake based system (e.g. [2]). This is a fairly common
problem but this solution is far more simple as it only provides enough
support to deal with the immediate needs of the Swift project. It only
supports building the bits of ICU that are needed for the Swift project
and tries to hardcode as much of the configuration as possible to reduce
the size of the ICU build while retaining all functionality required for
the Swift use cases.

[1] https://unicode-org.atlassian.net/browse/ICU-7747
[2] https://github.com/LibCMaker/ICU_CMake_Files
---
 shared/ICU/CMakeLists.txt   | 758 ++++++++++++++++++++++++++++++++++++
 shared/ICU/icupkg.inc.cmake |  25 ++
 2 files changed, 783 insertions(+)
 create mode 100644 shared/ICU/CMakeLists.txt
 create mode 100644 shared/ICU/icupkg.inc.cmake

diff --git a/shared/ICU/CMakeLists.txt b/shared/ICU/CMakeLists.txt
new file mode 100644
index 00000000..d5216171
--- /dev/null
+++ b/shared/ICU/CMakeLists.txt
@@ -0,0 +1,758 @@
+#[[
+This source file is part of the Swift.org open source project
+
+Copyright (c) 2021 Saleem Abdulrasool.
+Copyright (c) 2022 Apple Inc. and the Swift System project authors
+Licensed under Apache License v2.0 with Runtime Library Exception
+
+See https://swift.org/LICENSE.txt for license information
+See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#]]
+
+cmake_minimum_required(VERSION 3.12.3)
+
+project(ICU LANGUAGES C CXX VERSION 69.1)
+
+option(BUILD_SHARED_LIBS "build shared libaries" YES)
+option(BUILD_TOOLS "build tools" NO)
+option(ICU_TOOLS_DIR "Path to prebuilt tools" "")
+
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+include(GNUInstallDirs)
+
+find_package(Python3 COMPONENTS Interpreter REQUIRED)
+
+if(NOT BUILD_SHARED_LIBS)
+  add_compile_definitions(U_STATIC_IMPLEMENTATION)
+  if(CMAKE_SYSTEM_NAME STREQUAL Windows)
+    set(CMAKE_STATIC_LIBRARY_PREFIX s)
+  endif()
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL Windows)
+  # NOTE(compnerd) we alter the user-controlled flags here as we cannot override
+  # this as a setting otherwise.
+  string(REPLACE "/EHsc" "/EHs-c-" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
+
+  add_compile_definitions(_CRT_SECURE_NO_DEPRECATE)
+  add_compile_definitions(_HAS_EXCEPTIONS=0)
+  add_compile_definitions(U_PLATFORM_USES_ONLY_WIN32_API=1)
+
+  add_compile_options(/Zc:wchar_t)
+  add_compile_options(/utf-8)
+
+  add_compile_options(/GF)
+  add_compile_options(/Gy)
+elseif(CMAKE_SYSTEM_NAME STREQUAL Linux OR CMAKE_SYSTEM_NAME STREQUAL Android)
+  add_compile_options(-Wno-invalid-constexpr)
+  add_compile_options(-ffunction-sections -fdata-sections)
+
+  include(CheckIncludeFiles)
+  check_include_files(elf.h HAVE_ELF_H)
+  if(HAVE_ELF_H)
+    add_compile_definitions(U_HAVE_ELF_H=1)
+  endif()
+endif()
+
+set(THREADS_PREFER_PTHREAD_FLAG YES)
+find_package(Threads)
+
+add_compile_definitions(U_ATTRIBUTE_DEPRECATED=)
+add_compile_definitions(U_DISABLE_RENAMING=0)
+# add_compile_definitions(U_HIDE_DRAFT_API=1)
+# add_compile_definitions(U_HIDE_DEPRECATED_API=1)
+add_compile_definitions(U_ENABLE_DYLOAD=0)
+
+include_directories(source/common)
+
+# icu stub data
+add_library(icudt
+  source/stubdata/stubdata.cpp)
+if(CMAKE_SYSTEM_NAME STREQUAL Windows)
+  target_sources(icudt PRIVATE
+    source/data/misc/icudata.rc)
+endif()
+target_compile_definitions(icudt PRIVATE
+  STUBDATA_BUILD)
+set_target_properties(icudt PROPERTIES
+  OUTPUT_NAME icudt${PROJECT_VERSION_MAJOR})
+
+# icu common (unicode)
+add_library(icuuc
+  source/common/filteredbrk.cpp
+  source/common/ubidi.cpp
+  source/common/ubiditransform.cpp
+  source/common/ubidi_props.cpp
+  source/common/ubidiln.cpp
+  source/common/ubidiwrt.cpp
+  source/common/uloc_keytype.cpp
+  source/common/ushape.cpp
+  source/common/brkeng.cpp
+  source/common/brkiter.cpp
+  source/common/dictbe.cpp
+  source/common/pluralmap.cpp
+  source/common/rbbi.cpp
+  source/common/rbbidata.cpp
+  source/common/rbbinode.cpp
+  source/common/rbbirb.cpp
+  source/common/rbbiscan.cpp
+  source/common/rbbisetb.cpp
+  source/common/rbbistbl.cpp
+  source/common/rbbitblb.cpp
+  source/common/rbbi_cache.cpp
+  source/common/dictionarydata.cpp
+  source/common/ubrk.cpp
+  source/common/ucol_swp.cpp
+  source/common/propsvec.cpp
+  source/common/uarrsort.cpp
+  source/common/uenum.cpp
+  source/common/uhash.cpp
+  source/common/uhash_us.cpp
+  source/common/ulist.cpp
+  source/common/ustack.cpp
+  source/common/ustrenum.cpp
+  source/common/utrie.cpp
+  source/common/utrie_swap.cpp
+  source/common/utrie2.cpp
+  source/common/utrie2_builder.cpp
+  source/common/uvector.cpp
+  source/common/uvectr32.cpp
+  source/common/uvectr64.cpp
+  source/common/errorcode.cpp
+  source/common/icudataver.cpp
+  source/common/locmap.cpp
+  source/common/putil.cpp
+  source/common/umath.cpp
+  source/common/umutex.cpp
+  source/common/utrace.cpp
+  source/common/utypes.cpp
+  source/common/wintz.cpp
+  source/common/ucnv.cpp
+  source/common/ucnv2022.cpp
+  source/common/ucnv_bld.cpp
+  source/common/ucnv_cb.cpp
+  source/common/ucnv_cnv.cpp
+  source/common/ucnv_ct.cpp
+  source/common/ucnv_err.cpp
+  source/common/ucnv_ext.cpp
+  source/common/ucnv_io.cpp
+  source/common/ucnv_lmb.cpp
+  source/common/ucnv_set.cpp
+  source/common/ucnv_u16.cpp
+  source/common/ucnv_u32.cpp
+  source/common/ucnv_u7.cpp
+  source/common/ucnv_u8.cpp
+  source/common/ucnvbocu.cpp
+  source/common/ucnvdisp.cpp
+  source/common/ucnvhz.cpp
+  source/common/ucnvisci.cpp
+  source/common/ucnvlat1.cpp
+  source/common/ucnvmbcs.cpp
+  source/common/ucnvscsu.cpp
+  source/common/ucnvsel.cpp
+  source/common/cmemory.cpp
+  source/common/ucln_cmn.cpp
+  source/common/ucmndata.cpp
+  source/common/udata.cpp
+  source/common/udatamem.cpp
+  source/common/udataswp.cpp
+  source/common/uinit.cpp
+  source/common/umapfile.cpp
+  source/common/uobject.cpp
+  source/common/dtintrv.cpp
+  source/common/parsepos.cpp
+  source/common/ustrfmt.cpp
+  source/common/util.cpp
+  source/common/util_props.cpp
+  source/common/punycode.cpp
+  source/common/uidna.cpp
+  source/common/uts46.cpp
+  source/common/localebuilder.cpp
+  source/common/localematcher.cpp
+  source/common/localeprioritylist.cpp
+  source/common/locavailable.cpp
+  source/common/locbased.cpp
+  source/common/locdispnames.cpp
+  source/common/locdistance.cpp
+  source/common/locdspnm.cpp
+  source/common/locid.cpp
+  source/common/loclikely.cpp
+  source/common/loclikelysubtags.cpp
+  source/common/locresdata.cpp
+  source/common/locutil.cpp
+  source/common/lsr.cpp
+  source/common/resbund.cpp
+  source/common/resbund_cnv.cpp
+  source/common/ucat.cpp
+  source/common/uloc.cpp
+  source/common/uloc_tag.cpp
+  source/common/ures_cnv.cpp
+  source/common/uresbund.cpp
+  source/common/uresdata.cpp
+  source/common/resource.cpp
+  source/common/ucurr.cpp
+  source/common/caniter.cpp
+  source/common/filterednormalizer2.cpp
+  source/common/loadednormalizer2impl.cpp
+  source/common/normalizer2.cpp
+  source/common/normalizer2impl.cpp
+  source/common/normlzr.cpp
+  source/common/unorm.cpp
+  source/common/unormcmp.cpp
+  source/common/bmpset.cpp
+  source/common/patternprops.cpp
+  source/common/propname.cpp
+  source/common/ruleiter.cpp
+  source/common/ucase.cpp
+  source/common/uchar.cpp
+  source/common/characterproperties.cpp
+  source/common/unames.cpp
+  source/common/unifiedcache.cpp
+  source/common/unifilt.cpp
+  source/common/unifunct.cpp
+  source/common/uniset.cpp
+  source/common/uniset_closure.cpp
+  source/common/uniset_props.cpp
+  source/common/unisetspan.cpp
+  source/common/uprops.cpp
+  source/common/usc_impl.cpp
+  source/common/uscript.cpp
+  source/common/uscript_props.cpp
+  source/common/uset.cpp
+  source/common/uset_props.cpp
+  source/common/usetiter.cpp
+  source/common/icuplug.cpp
+  source/common/serv.cpp
+  source/common/servlk.cpp
+  source/common/servlkf.cpp
+  source/common/servls.cpp
+  source/common/servnotf.cpp
+  source/common/servrbf.cpp
+  source/common/servslkf.cpp
+  source/common/usprep.cpp
+  source/common/appendable.cpp
+  source/common/bytesinkutil.cpp
+  source/common/bytestream.cpp
+  source/common/bytestrie.cpp
+  source/common/bytestriebuilder.cpp
+  source/common/bytestrieiterator.cpp
+  source/common/chariter.cpp
+  source/common/charstr.cpp
+  source/common/cstring.cpp
+  source/common/cstr.cpp
+  source/common/cwchar.cpp
+  source/common/edits.cpp
+  source/common/messagepattern.cpp
+  source/common/schriter.cpp
+  source/common/stringpiece.cpp
+  source/common/stringtriebuilder.cpp
+  source/common/simpleformatter.cpp
+  source/common/ucasemap.cpp
+  source/common/ucasemap_titlecase_brkiter.cpp
+  source/common/ucharstrie.cpp
+  source/common/ucharstriebuilder.cpp
+  source/common/ucharstrieiterator.cpp
+  source/common/uchriter.cpp
+  source/common/ucptrie.cpp
+  source/common/uinvchar.cpp
+  source/common/uiter.cpp
+  source/common/umutablecptrie.cpp
+  source/common/unistr.cpp
+  source/common/unistr_case.cpp
+  source/common/unistr_case_locale.cpp
+  source/common/unistr_cnv.cpp
+  source/common/unistr_props.cpp
+  source/common/unistr_titlecase_brkiter.cpp
+  source/common/ustr_cnv.cpp
+  source/common/ustr_titlecase_brkiter.cpp
+  source/common/ustr_wcs.cpp
+  source/common/ustrcase.cpp
+  source/common/ustrcase_locale.cpp
+  source/common/ustring.cpp
+  source/common/ustrtrns.cpp
+  source/common/utext.cpp
+  source/common/utf_impl.cpp
+  source/common/static_unicode_sets.cpp
+  source/common/restrace.cpp
+  source/common/sharedobject.cpp)
+if(CMAKE_SYSTEM_NAME STREQUAL Windows)
+  target_sources(icuuc PRIVATE
+    source/common/common.rc)
+endif()
+target_compile_definitions(icuuc PRIVATE
+  U_COMMON_IMPLEMENTATION)
+target_include_directories(icuuc PUBLIC
+  source/common)
+target_link_libraries(icuuc PRIVATE
+  icudt
+  Threads::Threads)
+set_target_properties(icuuc PROPERTIES
+  OUTPUT_NAME icuuc${PROJECT_VERSION_MAJOR})
+
+# icu internationalization (i18n)
+add_library(icuin
+  source/i18n/erarules.cpp
+  source/i18n/region.cpp
+  source/i18n/uregion.cpp
+  source/i18n/alphaindex.cpp
+  source/i18n/bocsu.cpp
+  source/i18n/coleitr.cpp
+  source/i18n/coll.cpp
+  source/i18n/collation.cpp
+  source/i18n/collationbuilder.cpp
+  source/i18n/collationcompare.cpp
+  source/i18n/collationdata.cpp
+  source/i18n/collationdatabuilder.cpp
+  source/i18n/collationdatareader.cpp
+  source/i18n/collationdatawriter.cpp
+  source/i18n/collationfastlatin.cpp
+  source/i18n/collationfastlatinbuilder.cpp
+  source/i18n/collationfcd.cpp
+  source/i18n/collationiterator.cpp
+  source/i18n/collationkeys.cpp
+  source/i18n/collationroot.cpp
+  source/i18n/collationrootelements.cpp
+  source/i18n/collationruleparser.cpp
+  source/i18n/collationsets.cpp
+  source/i18n/collationsettings.cpp
+  source/i18n/collationtailoring.cpp
+  source/i18n/collationweights.cpp
+  source/i18n/rulebasedcollator.cpp
+  source/i18n/search.cpp
+  source/i18n/sortkey.cpp
+  source/i18n/stsearch.cpp
+  source/i18n/tzfmt.cpp
+  source/i18n/tzgnames.cpp
+  source/i18n/tznames.cpp
+  source/i18n/tznames_impl.cpp
+  source/i18n/ucol.cpp
+  source/i18n/ucol_res.cpp
+  source/i18n/ucol_sit.cpp
+  source/i18n/ucoleitr.cpp
+  source/i18n/uitercollationiterator.cpp
+  source/i18n/usearch.cpp
+  source/i18n/astro.cpp
+  source/i18n/basictz.cpp
+  source/i18n/buddhcal.cpp
+  source/i18n/calendar.cpp
+  source/i18n/cecal.cpp
+  source/i18n/chnsecal.cpp
+  source/i18n/choicfmt.cpp
+  source/i18n/compactdecimalformat.cpp
+  source/i18n/coptccal.cpp
+  source/i18n/curramt.cpp
+  source/i18n/currfmt.cpp
+  source/i18n/currpinf.cpp
+  source/i18n/currunit.cpp
+  source/i18n/dangical.cpp
+  source/i18n/datefmt.cpp
+  source/i18n/dayperiodrules.cpp
+  source/i18n/dcfmtsym.cpp
+  source/i18n/decContext.cpp
+  source/i18n/decimfmt.cpp
+  source/i18n/decNumber.cpp
+  source/i18n/double-conversion-bignum-dtoa.cpp
+  source/i18n/double-conversion-bignum.cpp
+  source/i18n/double-conversion-cached-powers.cpp
+  source/i18n/double-conversion-double-to-string.cpp
+  source/i18n/double-conversion-fast-dtoa.cpp
+  source/i18n/double-conversion-string-to-double.cpp
+  source/i18n/double-conversion-strtod.cpp
+  source/i18n/dtfmtsym.cpp
+  source/i18n/dtitvfmt.cpp
+  source/i18n/dtitvinf.cpp
+  source/i18n/dtptngen.cpp
+  source/i18n/dtrule.cpp
+  source/i18n/ethpccal.cpp
+  source/i18n/fmtable.cpp
+  source/i18n/fmtable_cnv.cpp
+  source/i18n/format.cpp
+  source/i18n/formattedval_iterimpl.cpp
+  source/i18n/formattedval_sbimpl.cpp
+  source/i18n/formattedvalue.cpp
+  source/i18n/fphdlimp.cpp
+  source/i18n/fpositer.cpp
+  source/i18n/gender.cpp
+  source/i18n/gregocal.cpp
+  source/i18n/gregoimp.cpp
+  source/i18n/hebrwcal.cpp
+  source/i18n/indiancal.cpp
+  source/i18n/islamcal.cpp
+  source/i18n/japancal.cpp
+  source/i18n/listformatter.cpp
+  source/i18n/ulistformatter.cpp
+  source/i18n/measfmt.cpp
+  source/i18n/measunit.cpp
+  source/i18n/measunit_extra.cpp
+  source/i18n/measure.cpp
+  source/i18n/msgfmt.cpp
+  source/i18n/nfrs.cpp
+  source/i18n/nfrule.cpp
+  source/i18n/nfsubs.cpp
+  source/i18n/number_affixutils.cpp
+  source/i18n/number_asformat.cpp
+  source/i18n/number_compact.cpp
+  source/i18n/number_decimalquantity.cpp
+  source/i18n/number_decimfmtprops.cpp
+  source/i18n/number_fluent.cpp
+  source/i18n/number_formatimpl.cpp
+  source/i18n/number_grouping.cpp
+  source/i18n/number_integerwidth.cpp
+  source/i18n/number_longnames.cpp
+  source/i18n/number_modifiers.cpp
+  source/i18n/number_notation.cpp
+  source/i18n/number_output.cpp
+  source/i18n/number_padding.cpp
+  source/i18n/number_patternmodifier.cpp
+  source/i18n/number_patternstring.cpp
+  source/i18n/number_rounding.cpp
+  source/i18n/number_scientific.cpp
+  source/i18n/formatted_string_builder.cpp
+  source/i18n/number_usageprefs.cpp
+  source/i18n/number_utils.cpp
+  source/i18n/number_mapper.cpp
+  source/i18n/number_multiplier.cpp
+  source/i18n/number_currencysymbols.cpp
+  source/i18n/number_skeletons.cpp
+  source/i18n/number_symbolswrapper.cpp
+  source/i18n/number_capi.cpp
+  source/i18n/string_segment.cpp
+  source/i18n/numparse_parsednumber.cpp
+  source/i18n/numparse_impl.cpp
+  source/i18n/numparse_symbols.cpp
+  source/i18n/numparse_decimal.cpp
+  source/i18n/numparse_scientific.cpp
+  source/i18n/numparse_currency.cpp
+  source/i18n/numparse_affixes.cpp
+  source/i18n/numparse_compositions.cpp
+  source/i18n/numparse_validators.cpp
+  source/i18n/numrange_capi.cpp
+  source/i18n/numrange_fluent.cpp
+  source/i18n/numrange_impl.cpp
+  source/i18n/numfmt.cpp
+  source/i18n/numsys.cpp
+  source/i18n/olsontz.cpp
+  source/i18n/persncal.cpp
+  source/i18n/pluralranges.cpp
+  source/i18n/plurfmt.cpp
+  source/i18n/plurrule.cpp
+  source/i18n/quantityformatter.cpp
+  source/i18n/rbnf.cpp
+  source/i18n/rbtz.cpp
+  source/i18n/reldatefmt.cpp
+  source/i18n/reldtfmt.cpp
+  source/i18n/scientificnumberformatter.cpp
+  source/i18n/sharedbreakiterator.cpp
+  source/i18n/selfmt.cpp
+  source/i18n/simpletz.cpp
+  source/i18n/scriptset.cpp
+  source/i18n/smpdtfmt.cpp
+  source/i18n/smpdtfst.cpp
+  source/i18n/standardplural.cpp
+  source/i18n/taiwncal.cpp
+  source/i18n/timezone.cpp
+  source/i18n/tmunit.cpp
+  source/i18n/tmutamt.cpp
+  source/i18n/tmutfmt.cpp
+  source/i18n/tzrule.cpp
+  source/i18n/tztrans.cpp
+  source/i18n/ucal.cpp
+  source/i18n/udat.cpp
+  source/i18n/udateintervalformat.cpp
+  source/i18n/udatpg.cpp
+  source/i18n/ufieldpositer.cpp
+  source/i18n/ulocdata.cpp
+  source/i18n/umsg.cpp
+  source/i18n/units_complexconverter.cpp
+  source/i18n/units_converter.cpp
+  source/i18n/units_data.cpp
+  source/i18n/units_router.cpp
+  source/i18n/unum.cpp
+  source/i18n/unumsys.cpp
+  source/i18n/upluralrules.cpp
+  source/i18n/utf16collationiterator.cpp
+  source/i18n/utf8collationiterator.cpp
+  source/i18n/utmscale.cpp
+  source/i18n/vtzone.cpp
+  source/i18n/vzone.cpp
+  source/i18n/windtfmt.cpp
+  source/i18n/winnmfmt.cpp
+  source/i18n/wintzimpl.cpp
+  source/i18n/zonemeta.cpp
+  source/i18n/zrule.cpp
+  source/i18n/ztrans.cpp
+  source/i18n/ucln_in.cpp
+  source/i18n/regexcmp.cpp
+  source/i18n/regeximp.cpp
+  source/i18n/regexst.cpp
+  source/i18n/regextxt.cpp
+  source/i18n/rematch.cpp
+  source/i18n/repattrn.cpp
+  source/i18n/uregex.cpp
+  source/i18n/uregexc.cpp
+  source/i18n/anytrans.cpp
+  source/i18n/brktrans.cpp
+  source/i18n/casetrn.cpp
+  source/i18n/cpdtrans.cpp
+  source/i18n/esctrn.cpp
+  source/i18n/funcrepl.cpp
+  source/i18n/name2uni.cpp
+  source/i18n/nortrans.cpp
+  source/i18n/nultrans.cpp
+  source/i18n/quant.cpp
+  source/i18n/rbt.cpp
+  source/i18n/rbt_data.cpp
+  source/i18n/rbt_pars.cpp
+  source/i18n/rbt_rule.cpp
+  source/i18n/rbt_set.cpp
+  source/i18n/remtrans.cpp
+  source/i18n/strmatch.cpp
+  source/i18n/strrepl.cpp
+  source/i18n/titletrn.cpp
+  source/i18n/tolowtrn.cpp
+  source/i18n/toupptrn.cpp
+  source/i18n/translit.cpp
+  source/i18n/transreg.cpp
+  source/i18n/tridpars.cpp
+  source/i18n/unesctrn.cpp
+  source/i18n/uni2name.cpp
+  source/i18n/utrans.cpp
+  source/i18n/csdetect.cpp
+  source/i18n/csmatch.cpp
+  source/i18n/csr2022.cpp
+  source/i18n/csrecog.cpp
+  source/i18n/csrmbcs.cpp
+  source/i18n/csrsbcs.cpp
+  source/i18n/csrucode.cpp
+  source/i18n/csrutf8.cpp
+  source/i18n/inputext.cpp
+  source/i18n/ucsdet.cpp
+  source/i18n/uspoof.cpp
+  source/i18n/uspoof_build.cpp
+  source/i18n/uspoof_conf.cpp
+  source/i18n/uspoof_impl.cpp)
+if(CMAKE_SYSTEM_NAME STREQUAL Windows)
+  target_sources(icuin PRIVATE
+    source/i18n/i18n.rc)
+endif()
+target_include_directories(icuin PUBLIC
+  source/i18n)
+target_compile_definitions(icuin PRIVATE
+  U_I18N_IMPLEMENTATION)
+target_link_libraries(icuin PRIVATE
+  icuuc)
+set_target_properties(icuin PROPERTIES
+  OUTPUT_NAME icuin${PROJECT_VERSION_MAJOR})
+
+if(BUILD_TOOLS)
+  add_library(icutu
+    source/tools/toolutil/collationinfo.cpp
+    source/tools/toolutil/dbgutil.cpp
+    source/tools/toolutil/denseranges.cpp
+    source/tools/toolutil/filestrm.cpp
+    source/tools/toolutil/filetools.cpp
+    source/tools/toolutil/flagparser.cpp
+    source/tools/toolutil/package.cpp
+    source/tools/toolutil/pkg_genc.cpp
+    source/tools/toolutil/pkg_gencmn.cpp
+    source/tools/toolutil/pkg_icu.cpp
+    source/tools/toolutil/pkgitems.cpp
+    source/tools/toolutil/ppucd.cpp
+    source/tools/toolutil/swapimpl.cpp
+    source/tools/toolutil/toolutil.cpp
+    source/tools/toolutil/ucbuf.cpp
+    source/tools/toolutil/ucln_tu.cpp
+    source/tools/toolutil/ucm.cpp
+    source/tools/toolutil/ucmstate.cpp
+    source/tools/toolutil/udbgutil.cpp
+    source/tools/toolutil/unewdata.cpp
+    source/tools/toolutil/uoptions.cpp
+    source/tools/toolutil/uparse.cpp
+    source/tools/toolutil/writesrc.cpp
+    source/tools/toolutil/xmlparser.cpp)
+  target_compile_definitions(icutu PRIVATE
+    U_TOOLUTIL_IMPLEMENTATION)
+  target_include_directories(icutu PUBLIC
+    source/tools/toolutil)
+  target_link_libraries(icutu PRIVATE
+    icuuc icuin)
+
+  add_executable(gencnval
+    source/tools/gencnval/gencnval.c)
+  target_link_libraries(gencnval PRIVATE
+    icuuc icutu)
+
+  add_executable(gencfu
+    source/tools/gencfu/gencfu.cpp)
+  target_link_libraries(gencfu PRIVATE
+    icuuc icuin icutu)
+
+  add_executable(makeconv
+    source/tools/makeconv/gencnvex.c
+    source/tools/makeconv/genmbcs.cpp
+    source/tools/makeconv/makeconv.cpp
+    source/tools/makeconv/ucnvstat.c)
+  target_link_libraries(makeconv PRIVATE
+    icuuc icutu)
+
+  add_executable(genbrk
+    source/tools/genbrk/genbrk.cpp)
+  target_link_libraries(genbrk PRIVATE
+    icuuc icutu)
+
+  add_executable(gensprep
+    source/tools/gensprep/gensprep.c
+    source/tools/gensprep/store.c)
+  target_link_libraries(gensprep PRIVATE
+    icuuc icutu)
+
+  add_executable(gendict
+    source/tools/gendict/gendict.cpp)
+  target_link_libraries(gendict PRIVATE
+    icuuc icutu)
+
+  add_executable(icupkg
+    source/tools/icupkg/icupkg.cpp)
+  target_link_libraries(icupkg PRIVATE
+    icuuc icutu)
+
+  add_executable(genrb
+    source/tools/genrb/errmsg.c
+    source/tools/genrb/filterrb.cpp
+    source/tools/genrb/genrb.cpp
+    source/tools/genrb/parse.cpp
+    source/tools/genrb/prscmnts.cpp
+    source/tools/genrb/rbutil.c
+    source/tools/genrb/read.c
+    source/tools/genrb/reslist.cpp
+    source/tools/genrb/rle.c
+    source/tools/genrb/ustr.c
+    source/tools/genrb/wrtjava.cpp
+    source/tools/genrb/wrtxml.cpp)
+  target_link_libraries(genrb PRIVATE
+    icuuc icuin icutu)
+
+  add_executable(pkgdata
+    source/tools/pkgdata/pkgdata.cpp
+    source/tools/pkgdata/pkgtypes.c)
+  target_link_libraries(pkgdata PRIVATE
+    icuuc icutu)
+
+  set(ICU_TOOLS_DIR ${CMAKE_CURRENT_BINARY_DIR})
+elseif(ICU_TOOLS_DIR)
+  foreach(tool gencnval;gencfu;makeconv;genbrk;gensprep;gendict;icupkg;genrb;pkgdata)
+    add_executable(${tool} IMPORTED)
+    set_target_properties(${tool} PROPERTIES
+      IMPORTED_LOCATION ${ICU_TOOLS_DIR}/${tool}${CMAKE_EXECUTABLE_SUFFIX})
+  endforeach()
+else()
+  include(ExternalProject)
+  ExternalProject_Add(Tools
+    SOURCE_DIR ${PROJECT_SOURCE_DIR}
+    BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/Tools
+    CMAKE_ARGS
+      -DBUILD_TOOLS=YES
+      -DCMAKE_BUILD_TYPE:STRING=Release
+      -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}
+      -DCMAKE_SYSTEM_NAME:STRING=${CMAKE_HOST_SYSTEM_NAME}
+      -DCMAKE_SYSTEM_PROCESSOR:STRING=${CMAKE_HOST_SYSTEM_PROCESSOR}
+    BUILD_COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR>
+    INSTALL_COMMAND ""
+    BUILD_BYPRODUCTS
+      <BINARY_DIR>/gencnval${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/gencfu${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/makeconv${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/genbrk${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/gensprep${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/gendict${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/icupkg${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/genrb${CMAKE_EXECUTABLE_SUFFIX}
+      <BINARY_DIR>/pkgdata${CMAKE_EXECUTABLE_SUFFIX})
+    ExternalProject_Get_Property(Tools BINARY_DIR)
+
+    foreach(tool gencnval;gencfu;makeconv;genbrk;gensprep;gendict;icupkg;genrb;pkgdata)
+      add_executable(${tool} IMPORTED)
+      set_target_properties(${tool} PROPERTIES
+        IMPORTED_LOCATION ${BINARY_DIR}/${tool}${CMAKE_EXECUTABLE_SUFFIX})
+    endforeach()
+
+    set(ICU_TOOLS_DIR ${BINARY_DIR})
+endif()
+
+include(TestBigEndian)
+test_big_endian(IS_BIG_ENDIAN_HOST)
+
+set(U_ICUDATA_NAME icudt${PROJECT_VERSION_MAJOR})
+if(IS_BIG_ENDIAN_HOST)
+  set(U_ICUDATA_PKGN icudt${PROJECT_VERSION_MAJOR}b)
+else()
+  set(U_ICUDATA_PKGN icudt${PROJECT_VERSION_MAJOR}l)
+endif()
+
+add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/icudata.lst
+  COMMAND ${CMAKE_COMMAND} -E env PYTHONPATH=${PROJECT_SOURCE_DIR}/source/python
+    ${Python3_EXECUTABLE} -B -m icutools.databuilder
+    --mode $<IF:$<STREQUAL:${CMAKE_HOST_SYSTEM_NAME},Windows>,windows-exec,unix-exec>
+    --src_dir ${PROJECT_SOURCE_DIR}/source/data
+    --tool_dir ${ICU_TOOLS_DIR}
+    # NOTE(compnerd) setting the configuration allows us to move back into the
+    # binary directory as we emit all the tools into the binary directory.
+    --tool_cfg ..
+    --out_dir ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN}
+    --tmp_dir ${CMAKE_CURRENT_BINARY_DIR}/data/tmp
+  DEPENDS gencnval gencfu makeconv genbrk gensprep gendict icupkg genrb
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/source/data)
+
+if(CMAKE_SYSTEM_NAME STREQUAL Windows)
+  if(BUILD_SHARED_LIBS)
+    set(_U_ICUDATA_LIB ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN}/${CMAKE_SHARED_LIBRARY_PREFIX}${U_ICUDATA_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX})
+  else()
+    set(_U_ICUDATA_LIB ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN}/${CMAKE_STATIC_LIBRARY_PREFIX}${U_ICUDATA_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX})
+  endif()
+
+  add_custom_command(OUTPUT ${_U_ICUDATA_LIB}
+    COMMAND $<TARGET_FILE:pkgdata> -a ${MSVC_C_ARCHITECTURE_ID} -f -e ${U_ICUDATA_NAME} -v -m $<IF:$<BOOL:${BUILD_SHARED_LIBS}>,dll,static> -c -p ${U_ICUDATA_PKGN} -T ${CMAKE_CURRENT_BINARY_DIR}/data/tmp -L ${U_ICUDATA_NAME} -d ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN} -s ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN} ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/icudata.lst
+    DEPENDS pkgdata ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/icudata.lst
+    BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/${U_ICUDATA_PKGN}.dat ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/${U_ICUDATA_PKGN}_dat.obj)
+  add_custom_target(icudata ALL
+    DEPENDS ${_U_ICUDATA_LIB})
+
+  if(BUILD_SHARED_LIBS)
+    install(FILES ${_U_ICUDATA_LIB} DESTINATION ${CMAKE_INSTALL_FULL_BINDIR})
+  else()
+    install(FILES ${_U_ICUDATA_LIB} DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR})
+  endif()
+elseif(CMAKE_SYSTEM_NAME STREQUAL Darwin)
+  message(FATAL_ERROR "cannot build ICU data library")
+else()
+  enable_language(ASM)
+
+  configure_file(icupkg.inc.cmake ${CMAKE_BINARY_DIR}/icupkg.inc)
+
+  add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/${U_ICUDATA_PKGN}_dat.S
+    COMMAND $<TARGET_FILE:pkgdata> -f -e ${U_ICUDATA_NAME} -v -m $<IF:$<BOOL:${BUILD_SHARED_LIBS}>,dll,static> -c -p ${U_ICUDATA_PKGN} -T ${CMAKE_CURRENT_BINARY_DIR}/data/tmp -L ${U_ICUDATA_NAME} -d ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN} -s ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN} ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/icudata.lst -O ${CMAKE_BINARY_DIR}/icupkg.inc
+    DEPENDS pkgdata ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/icudata.lst
+    BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/${U_ICUDATA_PKGN}.dat ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/${U_ICUDATA_PKGN}_dat.S)
+
+  add_library(${U_ICUDATA_NAME}
+    ${CMAKE_CURRENT_BINARY_DIR}/data/tmp/${U_ICUDATA_PKGN}_dat.S)
+  set_target_properties(${U_ICUDATA_NAME} PROPERTIES
+    LINKER_LANGUAGE C
+    LINK_OPTIONS "-nodefaultlibs;-nostdlib;-Bsymbolic"
+    LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/data/${U_ICUDATA_PKGN})
+
+  install(TARGETS ${U_ICUDATA_NAME}
+    DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR})
+endif()
+
+install(TARGETS icuuc icuin
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_FULL_BINDIR})
+install(DIRECTORY source/common/unicode
+  DESTINATION ${CMAKE_INSTALL_FULL_INCLUDEDIR})
+install(DIRECTORY source/i18n/unicode
+  DESTINATION ${CMAKE_INSTALL_FULL_INCLUDEDIR})
+
diff --git a/shared/ICU/icupkg.inc.cmake b/shared/ICU/icupkg.inc.cmake
new file mode 100644
index 00000000..4b4a7d91
--- /dev/null
+++ b/shared/ICU/icupkg.inc.cmake
@@ -0,0 +1,25 @@
+#[[
+This source file is part of the Swift.org open source project
+
+Copyright (c) 2019 Saleem Abdulrasool.
+Copyright (c) 2022 Apple Inc. and the Swift System project authors
+Licensed under Apache License v2.0 with Runtime Library Exception
+
+See https://swift.org/LICENSE.txt for license information
+See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#]]
+
+GENCCODE_ASSEMBLY_TYPE=-a gcc
+SO=so
+SOBJ=so
+A=a
+LIBPREFIX=@CMAKE_SHARED_LIBRARY_PREFIX@
+LIB_EXT_ORDER=.@PROJECT_VERSION_MAJOR@
+COMPILE="@CMAKE_COMMAND@" -E echo COMPILE
+LIBFLAGS=
+GENLIB="@CMAKE_COMMAND@" -E echo GENLIB
+LDICUDTFLAGS=-nodefaultlibs -nostdlibs
+AR=@CMAKE_AR@
+ARFLAGS=
+RANLIB=@CMAKE_RANLIB@
+INSTALL_CMD="@CMAKE_COMMAND@" -E echo INSTALL

From 83e63b524dee69a3c02e8e1b607193ea92a92ec3 Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Sat, 21 May 2022 12:15:55 -0700
Subject: [PATCH 2/2] Apply suggestions from code review

Co-authored-by: Mishal Shah <shahmishal@users.noreply.github.com>
---
 shared/ICU/CMakeLists.txt   | 2 +-
 shared/ICU/icupkg.inc.cmake | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/shared/ICU/CMakeLists.txt b/shared/ICU/CMakeLists.txt
index d5216171..e7c10dc7 100644
--- a/shared/ICU/CMakeLists.txt
+++ b/shared/ICU/CMakeLists.txt
@@ -2,7 +2,7 @@
 This source file is part of the Swift.org open source project
 
 Copyright (c) 2021 Saleem Abdulrasool.
-Copyright (c) 2022 Apple Inc. and the Swift System project authors
+Copyright (c) 2022 Apple Inc. and the Swift project authors
 Licensed under Apache License v2.0 with Runtime Library Exception
 
 See https://swift.org/LICENSE.txt for license information
diff --git a/shared/ICU/icupkg.inc.cmake b/shared/ICU/icupkg.inc.cmake
index 4b4a7d91..05c254a9 100644
--- a/shared/ICU/icupkg.inc.cmake
+++ b/shared/ICU/icupkg.inc.cmake
@@ -2,7 +2,7 @@
 This source file is part of the Swift.org open source project
 
 Copyright (c) 2019 Saleem Abdulrasool.
-Copyright (c) 2022 Apple Inc. and the Swift System project authors
+Copyright (c) 2022 Apple Inc. and the Swift project authors
 Licensed under Apache License v2.0 with Runtime Library Exception
 
 See https://swift.org/LICENSE.txt for license information