build: Check for icu-uc instead of icu-i18n

This should be the ICU component we actually need.

CMakeLists.txt

@@ -118,7 +118,7 @@ if(LIBXML2_WITH_ICONV)
 endif()
 
 if(LIBXML2_WITH_ICU)
-    find_package(ICU REQUIRED COMPONENTS data i18n uc)
+    find_package(ICU REQUIRED COMPONENTS uc)
 endif()
 
 if(LIBXML2_WITH_LZMA)
@@ -336,16 +336,12 @@ if(LIBXML2_WITH_ICONV)
 endif()
 
 if(LIBXML2_WITH_ICU)
-    target_link_libraries(LibXml2 PRIVATE ICU::data ICU::i18n ICU::uc)
-    if(WIN32)
-        set(ICU_LDFLAGS "-licudt -licuin -licuuc")
-    else()
-        set(ICU_LDFLAGS "-licudata -licui18n -licuuc")
-    endif()
+    target_link_libraries(LibXml2 PRIVATE ICU::uc)
+    set(ICU_LDFLAGS "-licuuc")
     list(APPEND XML_PRIVATE_LIBS "${ICU_LDFLAGS}")
-    pkg_check_modules(ICU_PC IMPORTED_TARGET icu-i18n)
+    pkg_check_modules(ICU_PC IMPORTED_TARGET icu-uc)
     if(ICU_PC_FOUND)
-        list(APPEND XML_PC_REQUIRES icu-i18n)
+        list(APPEND XML_PC_REQUIRES icu-uc)
     else()
         list(APPEND XML_PC_LIBS "${ICU_LDFLAGS}")
     endif()

configure.ac

@@ -984,10 +984,10 @@ if test "$with_icu" != "no" && test "$with_icu" != "" ; then
 
     # Try pkg-config first so that static linking works.
     # If this succeeeds, we ignore the WITH_ICU directory.
-    PKG_CHECK_MODULES([ICU], [icu-i18n], [
-        WITH_ICU=1; XML_PC_REQUIRES="${XML_PC_REQUIRES} icu-i18n"
+    PKG_CHECK_MODULES([ICU], [icu-uc], [
+        WITH_ICU=1; XML_PC_REQUIRES="${XML_PC_REQUIRES} icu-uc"
         m4_ifdef([PKG_CHECK_VAR],
-            [PKG_CHECK_VAR([ICU_DEFS], [icu-i18n], [DEFS])])
+            [PKG_CHECK_VAR([ICU_DEFS], [icu-uc], [DEFS])])
         if test "x$ICU_DEFS" != "x"; then
             ICU_CFLAGS="$ICU_CFLAGS $ICU_DEFS"
         fi],[:])

meson.build

@@ -374,7 +374,7 @@ endif
 
 # icu
 if want_icu
-    icu_dep = dependency('icu-i18n', method: 'pkg-config')
+    icu_dep = dependency('icu-uc')
     defs = icu_dep.get_variable(pkgconfig: 'DEFS')
     if cc.has_argument(defs)
         libxml2_cflags += defs