https://bugs.openjdk.java.net/browse/JDK-8088200
patch is attached to the bug, same fix multiple times: diff -r 132033191951 buildSrc/armv5sf.gradle --- a/buildSrc/armv5sf.gradle Fri May 29 17:09:06 2015 -0400 +++ b/buildSrc/armv5sf.gradle Fri May 29 20:39:07 2015 -0400 @@ -96,7 +96,7 @@ def commonFlags = [ "-fno-strict-aliasing", "-fPIC", "-fno-omit-frame-pointer", // optimization flags - "-W", "-Wall", "-Wno-unused", "-Wno-parentheses", "-Werror=implicit-function-declaration"] // warning flags + "-Wextra", "-Wall", "-Wno-unused", "-Wno-parentheses", "-Werror=implicit-function-declaration"] // warning flags // Specify the compilation parameters and link parameters def ccFlags = [ commonFlags, "-I$JDK_HOME/include", "-I$JDK_HOME/include/$jniPlatform", "-c", -- David Hill<david.h...@oracle.com> Java Embedded Development "A man's feet should be planted in his country, but his eyes should survey the world." -- George Santayana (1863 - 1952)