Merge commit '3965d404ccd9b6cac95c4aee6cb668845031b685'

* commit '3965d404ccd9b6cac95c4aee6cb668845031b685':
  configure: Don't add -fPIC on windows targets

Merged-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -3716,7 +3716,13 @@ enable_weak_pic() {
     disabled pic && return
     enable pic
     add_cppflags -DPIC
-    add_cflags   -fPIC
+    case "$target_os" in
+    mingw*|cygwin*)
+        ;;
+    *)
+        add_cflags -fPIC
+        ;;
+    esac
     add_asflags  -fPIC
 }