Require ICU

CMakeLists.txt

@@ -97,6 +97,8 @@ 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(Boost REQUIRED)
 find_package(Threads)
@@ -104,10 +106,13 @@ find_package(Backtrace)
 if(Backtrace_FOUND)
   set(HAVE_BACKTRACE ON)
 endif()
-find_package(Iconv)
-find_package(ICU COMPONENTS uc i18n)
-if(ICU_FOUND)
-  set(HAVE_ICU ON)
+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(GnuTLS REQUIRED)
 find_package(Protobuf REQUIRED)