https://bugs.gentoo.org/831226

lib name is depend on USE flag 'unicode', but for unknown reason,
upstream remove XLIB in release 5.0.20240619 (always -lcdk instead
of -lcdkw if unicode is enabled), which cause link failed if
USE="unicode".

diff --git a/cdk-config.in b/cdk-config.in
index 19b2972..aa0b2c8 100644
--- a/cdk-config.in
+++ b/cdk-config.in
@@ -41,6 +41,7 @@ same_prefix=yes
 same_exec_prefix=yes
 
 THIS="@PACKAGE@"
+XLIB="@LIB_ROOTNAME@"
 
 [ $# = 0 ] && exec @SHELL@ "$0" --error
 
@@ -66,7 +67,7 @@ while [ $# -gt 0 ]; do
 
 	eval LDFLAGS='"@LDFLAGS@"'
 	eval LIBS='"@LIBS@"'
-	LIBS="-l${THIS} $LIBS"
+	LIBS="-l${XLIB} $LIBS"
 
 	# If the directory given by --libdir is not in the LDFLAGS+LIBS set,
 	# prepend it to LDFLAGS to help link this application's library.