--- ./configure.ac.orig	2023-01-30 20:35:40.839847499 +0300
+++ ./configure.ac	2023-01-30 20:48:27.751778042 +0300
@@ -838,7 +838,8 @@
 if test "x$enable_webp" != "xno" ; then
 
   if test "x$with_webp_lib_dir" != "x" ; then
-    LDFLAGS="-L$with_webp_lib_dir $LDFLAGS"
+    LIBS="-lpthread $LIBS"
+    LDFLAGS="-L$with_webp_lib_dir $LDFLAGS "
   fi
   
   AC_CHECK_LIB(webp, WebPDecode, [webp_lib=yes], [webp_lib=no],)