From 147bcf2ed341683a088d3447f94736b76ba8f028 Mon Sep 17 00:00:00 2001
From: Alexis Hildebrandt <afh@surryhill.net>
Date: Sun, 3 Dec 2023 18:20:19 +0100
Subject: cmake: Improve finding ICU library

by using CMake's FindICU module to locate the required
icuuc and icui18n libraries for use with boost regex icu.
---
 CMakeLists.txt | 9 ++++++---
 README.md      | 2 ++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab17cedd..e6b1270d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -107,6 +107,9 @@ endif()
 
 ########################################################################
 
+include(FindICU)
+find_package(ICU 63 OPTIONAL_COMPONENTS uc i18n)
+
 include(CheckIncludeFiles)
 include(CheckLibraryExists)
 include(CheckFunctionExists)
@@ -159,8 +162,8 @@ endif()
 
 cmake_push_check_state()
 
-set(CMAKE_REQUIRED_INCLUDES ${CMAKE_INCLUDE_PATH} ${Boost_INCLUDE_DIRS})
-set(CMAKE_REQUIRED_LIBRARIES ${Boost_LIBRARIES} icuuc ${PROFILE_LIBS})
+set(CMAKE_REQUIRED_INCLUDES ${CMAKE_INCLUDE_PATH} ${Boost_INCLUDE_DIRS} ${ICUE_INCLUDE_DIRS})
+set(CMAKE_REQUIRED_LIBRARIES ${Boost_LIBRARIES} ${ICU_LIBRARIES} ${PROFILE_LIBS})
 
 check_cxx_source_runs("
 #include <boost/regex/icu.hpp>
@@ -298,7 +301,7 @@ macro(add_ledger_library_dependencies _target)
     target_link_libraries(${_target} ${Boost_LIBRARIES})
   endif()
   if (HAVE_BOOST_REGEX_UNICODE)
-    target_link_libraries(${_target} icuuc)
+    target_link_libraries(${_target} ${ICU_LIBRARIES})
   endif()
   target_link_libraries(${_target} ${PROFILE_LIBS})
 endmacro(add_ledger_library_dependencies _target)
diff --git a/README.md b/README.md
index 76563266..caf3e92f 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,7 @@ Dependency  | Version (or greater)
 [Gmp]       | 6.1.2
 [Mpfr]      | 4.0.2
 [utfcpp]    | 3.2.3
+[ICU]       | 63 _optional_
 [gettext]   | 0.17 _optional_
 [libedit]   | 20090111-3.0 _optional_
 [Python]    | 3.9 _optional_
@@ -189,6 +190,7 @@ hack as much as you like, then [open a pull request on GitHub](https://github.co
 [GMP]: https://gmplib.org/
 [MPFR]: https://www.mpfr.org/
 [utfcpp]: https://utfcpp.sourceforge.net
+[ICU]: https://icu.unicode.org
 [gettext]: https://www.gnu.org/software/gettext/
 [libedit]: https://thrysoee.dk/editline/
 [Python]: https://python.org
-- 
cgit v1.2.3