ext(wip): don't set LIBPATH to avoid -Wl,-rpath linker args

ext/nokogiri/extconf.rb

@@ -846,7 +846,7 @@ def configure
 
   if zlib_recipe
     append_cppflags("-I#{zlib_recipe.path}/include")
-    $LIBPATH = ["#{zlib_recipe.path}/lib"] | $LIBPATH
+#    $LIBPATH = ["#{zlib_recipe.path}/lib"] | $LIBPATH
     ensure_package_configuration(
       opt: "zlib",
       pc: "zlib",
@@ -858,7 +858,7 @@ def configure
 
   if libiconv_recipe
     append_cppflags("-I#{libiconv_recipe.path}/include")
-    $LIBPATH = ["#{libiconv_recipe.path}/lib"] | $LIBPATH
+#    $LIBPATH = ["#{libiconv_recipe.path}/lib"] | $LIBPATH
     ensure_package_configuration(
       opt: "iconv",
       pc: "iconv",
@@ -979,12 +979,12 @@ def configure
         %x(sh #{config} --libs).strip.shellsplit.each do |arg|
           case arg
           when /\A-L(.+)\z/
-            # Prioritize ports' directories
-            $LIBPATH = if Regexp.last_match(1).start_with?(PACKAGE_ROOT_DIR + "/")
-              [Regexp.last_match(1)] | $LIBPATH
-            else
-              $LIBPATH | [Regexp.last_match(1)]
-            end
+            # # Prioritize ports' directories
+            # $LIBPATH = if Regexp.last_match(1).start_with?(PACKAGE_ROOT_DIR + "/")
+            #   [Regexp.last_match(1)] | $LIBPATH
+            # else
+            #   $LIBPATH | [Regexp.last_match(1)]
+            # end
           when /\A-l./
             libs.unshift(arg)
           else
@@ -1078,7 +1078,7 @@ def compile
 end
 append_cppflags("-I#{File.join(libgumbo_recipe.path, "include")}")
 $libs = $libs + " " + File.join(libgumbo_recipe.path, "lib", "libgumbo.a")
-$LIBPATH = $LIBPATH | [File.join(libgumbo_recipe.path, "lib")]
+# $LIBPATH = $LIBPATH | [File.join(libgumbo_recipe.path, "lib")]
 ensure_func("gumbo_parse_with_options", "nokogiri_gumbo.h")
 
 have_func("xmlHasFeature") || abort("xmlHasFeature() is missing.") # introduced in libxml 2.6.21