Require ICU

CMakeLists.txt

@@ -99,8 +99,6 @@ if(CCACHE_EXECUTABLE)
   SET_PROPERTY(GLOBAL PROPERTY RULE_LAUNCH_LINK ${CCACHE_EXECUTABLE})
 endif()
 
-option(USE_ICU "Use ICU" ON)
-
 find_package(PkgConfig REQUIRED)
 find_package(Threads REQUIRED)
 find_package(Backtrace)
@@ -108,14 +106,7 @@ if(Backtrace_FOUND)
   set(HAVE_BACKTRACE ON)
 endif()
 find_package(Boost REQUIRED)
-if(USE_ICU)
-  find_package(ICU COMPONENTS uc i18n REQUIRED)
-  if(ICU_FOUND)
-    set(HAVE_ICU ON)
-  endif()
-else()
-  find_package(Iconv)
-endif()
+find_package(ICU COMPONENTS uc i18n REQUIRED)
 find_package(Protobuf CONFIG)
 if(NOT Protobuf_FOUND)
   find_package(Protobuf REQUIRED)