dtucker at zip
Jul 3, 2012, 6:34 AM
Post #1 of 1
possible clang (2.9) bug affecting ssh-keygen
Has anyone had any success building openssh 6.0p1 using clang 2.9? I
think I found a compiler bug, at least in the 2.9 that ships with fedora
16 (i386). It causes (at least) ssh-keygen to spin indefinitely eating CPU.
I've reduced it to the following test case:
$ cat clang-test.c
main(int argc, char **argv)
$ clang -O2 -D_FORTIFY_SOURCE clang-test.c
It works fine with gcc and clang 3.1 (built from source) on the same
machine and clang 3.0 on ubuntu x86_64. Removing either -O2 or
-D_FORTIFY_SOURCE, or moving hostname from a global to a local variable
causes it to work with 2.9.
Given that it seems to be fixed in the newer clang versions I don't
intend filing a bug unless there's some evidence it affects newer
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4 37C9 C982 80C7 8FF4 FA69
Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.
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