[Beowulf] RHEL7 kernel update for L1TF vulnerability breaks RDMA
Peter St. John
peter.st.john at gmail.com
Mon Sep 10 15:30:05 PDT 2018
yes the gcc I used is 5.1, I guess that's how long I've had this laptop :-)
And I like that "not guarding" that sounds useful.
On Mon, Sep 10, 2018 at 6:15 PM, Chris Samuel <chris at csamuel.org> wrote:
> On Tuesday, 11 September 2018 1:25:55 AM AEST Peter St. John wrote:
> > I had wanted to say that such a bug would be caught by compiling with
> > reasonalbe warning level; but I think I was wrong.
> Interesting - looks like it depends on your GCC version, 7.3.0 catches it
> with -Wall here:
> chris at quad:/tmp$ gcc -Wall test.c -o test
> test.c: In function ‘main’:
> test.c:6:2: warning: this ‘if’ clause does not guard...
> if ( test );
> test.c:7:3: note: ...this statement, but the latter is misleadingly
> indented as if it were guarded by the ‘if’
> printf ( "hello\n" );
> > So I guess I have to forgive the software engineer who fat-fingered that
> > semicolon. Of course I've done worse.
> Oh yes, same here too! There but for... and all that. :-)
> All the best,
> Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC
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