diff --git a/ext/extmk.rb b/ext/extmk.rb
index 9293ecaf87..069465e77f 100755
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -260,7 +260,7 @@ def extmake(target)
       unless $mswin
         $extflags = ($extflags.split | $DLDFLAGS.split | $LDFLAGS.split).join(" ")
       end
-      $extlibs = merge_libs($extlibs, $libs.split, $LOCAL_LIBS.split)
+      $extlibs = merge_libs($extlibs, $libs.split(/\s+(?=-|\z)/), $LOCAL_LIBS.split(/\s+(?=-|\z)/))
       $extpath |= $LIBPATH
     end
   ensure
diff --git a/ext/tk/extconf.rb b/ext/tk/extconf.rb
index 155a92f6ab..6d34f1a492 100644
--- a/ext/tk/extconf.rb
+++ b/ext/tk/extconf.rb
@@ -1463,7 +1463,7 @@ end
 def setup_for_macosx_framework(tclver, tkver)
   # use framework, but no tclConfig.sh
   unless $LDFLAGS && $LDFLAGS.include?('-framework')
-    ($LDFLAGS ||= "") << ' -framework=Tk -framework=Tcl'
+    ($LDFLAGS ||= "") << ' -framework Tk -framework Tcl'
   end
 
   if TkLib_Config["tcl-framework-header"]
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 1430aa30ef..c42bab9f4f 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1010,7 +1010,7 @@ SRC
   def have_framework(fw, &b)
     checking_for fw do
       src = cpp_include("#{fw}/#{fw}.h") << "\n" "int main(void){return 0;}"
-      if try_link(src, opt = "-ObjC -framework=#{fw}", &b)
+      if try_link(src, opt = "-ObjC -framework #{fw}", &b)
         $defs.push(format("-DHAVE_FRAMEWORK_%s", fw.tr_cpp))
         $LDFLAGS << " " << opt
         true