diff --git a/m4/set_cflags_ldflags.m4 b/m4/set_cflags_ldflags.m4
index cbad3c10b0..08f5c983cc 100644
--- a/m4/set_cflags_ldflags.m4
+++ b/m4/set_cflags_ldflags.m4
@@ -15,6 +15,10 @@ for ldflag in $APPEND_LIB
 do
     APPEND_LDFLAGS="$APPEND_LDFLAGS -L$ldflag"
 done
+if [ ! -z $EXTRA_PREFIX ]; then
+    CPPFLAGS="$CPPFLAGS -I$EXTRA_PREFIX/include"
+    LDFLAGS="$LDFLAGS -L$EXTRA_PREFIX/lib"
+fi
 CPPFLAGS="$PREPEND_CPPFLAGS $CPPFLAGS $APPEND_CPPFLAGS"
 LDFLAGS="$PREPEND_LDFLAGS $LDFLAGS $APPEND_LDFLAGS"])
 
diff --git a/tools/configure b/tools/configure
index 375430df3f..36596389b8 100755
--- a/tools/configure
+++ b/tools/configure
@@ -4678,6 +4678,10 @@ for ldflag in $APPEND_LIB
 do
     APPEND_LDFLAGS="$APPEND_LDFLAGS -L$ldflag"
 done
+if  ! -z $EXTRA_PREFIX ; then
+    CPPFLAGS="$CPPFLAGS -I$EXTRA_PREFIX/include"
+    LDFLAGS="$LDFLAGS -L$EXTRA_PREFIX/lib"
+fi
 CPPFLAGS="$PREPEND_CPPFLAGS $CPPFLAGS $APPEND_CPPFLAGS"
 LDFLAGS="$PREPEND_LDFLAGS $LDFLAGS $APPEND_LDFLAGS"