diff --git a/tools/rockboxdev.sh b/tools/rockboxdev.sh
index 595a26a..cfc589f 100755
--- a/tools/rockboxdev.sh
+++ b/tools/rockboxdev.sh
@@ -236,7 +236,14 @@ gccurl="http://www.rockbox.org/gcc"
 case $arch in
   [Ss])
     target="sh-elf"
-    gccpatch="gcc-4.0.3-rockbox-1.diff"
+    case $system in
+      MINGW*)
+        gccpatch="gcc-4.0.3-rockbox-1-mingw.diff"
+        ;;
+      *)
+        gccpatch="gcc-4.0.3-rockbox-1.diff"
+        ;;
+    esac
     ;;
   [Mm])
     target="m68k-elf"
@@ -253,13 +260,23 @@ case $arch in
             ;;
         esac
         ;;
+      MINGW*)
+        gccpatch="gcc-3.4.6-mingw.patch"
+        ;;
       *)
         ;;
     esac
     ;;
   [Aa])
     target="arm-elf"
-    gccpatch="rockbox-multilibs-arm-elf-gcc-4.0.3_2.diff"
+    case $system in
+      MINGW*)
+        gccpatch="rockbox-multilibs-arm-elf-gcc-4.0.3_2-mingw.diff"
+        ;;
+      *)
+        gccpatch="rockbox-multilibs-arm-elf-gcc-4.0.3_2.diff"
+        ;;
+    esac
     ;;
   [Ii])
     target="mipsel-elf"
@@ -272,6 +289,9 @@ case $arch in
       Interix)
         gccpatch="gcc-4.1.2-interix.diff"
         ;;
+      MINGW*)
+        gccpatch="gcc-4.1.2-mingw.diff"
+        ;;
       *)
         ;;
     esac
@@ -282,6 +302,13 @@ case $arch in
     ;;
 esac
 
+# When gcc build on MinGW, "ln -s" does not use.
+case $arch in
+  MINGW*)
+    export ac_cv_prog_LN_S=ln
+    ;;
+esac
+
 bindir="$prefix/$target/bin"
 if test -n $pathadd; then
   pathadd="$pathadd:$bindir"