http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58234
--- Comment #2 from Larry Baker <baker at usgs dot gov> --- Andrew, Thank you for your prompt reply. Fair enough. Can you direct me to where glibc bugs are reported? I have already filed a bug report with Intel. The in-line asm is not quite correct. But the flaw is benign. I would like to repair my replacement asm. The issue you raised is exactly what I am concerned about. Can you tell me how it is possible to specify the clobber side effects without requiring output constraints? Is it legal to specify output constraints without variables? I tried following the example 4 in the GCC-Inline-Assembly-HOWTO.html, which looks extremely similar to what I want. But, I received the error I wrote about. Thanks for your time. Larry Baker US Geological Survey