RFR: JDK-8030350 : (s) Enable additional compiler warnings for GCC (original) (raw)

David Holmes david.holmes at oracle.com
Sun Feb 16 17:53:02 PST 2014

On 12/02/2014 5:42 AM, Mike Duigou wrote:

Hello all;

This is a final update to the previously reviewed changeset. I had to make one slight change in hotspot/src/os/bsd/vm/osbsd.cpp to accommodate a problem which appeared since this process began.

I'd say that's a bug in the checking logic.

But all still good.

Thanks, David

http://cr.openjdk.java.net/~mduigou/JDK-8030350/5/webrev/

This change will be integrated through the jdk9/hs-rt repos. From the original review request:

This is a change which enables additional compiler warnings for native compilation when using GCC. The (-Wformat -Wformat-security) options are supported by GCC 3.0.4 (the earliest version I checked, c. February 2002) and later so we shouldn't see issues with incompatibility.- Wextra appears to have been added in GCC 3.4.X line (c. 2004) so it should also be reasonably well adopted and replaces -W.

The core of the change is to add : -Wextra -Wno-unused -Wno-unused-parameter -Wformat=2 for general C and CC++ compilations. For HotSpot C++ compiles a slightly less aggressive set is used: -Wformat=2 -Wno-error=format-nonliteral is used. This change is targeted at the JDK 9 repos but could be backported to JDK 8 fairly easily/safely. Mike

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