I found a problem with master crashing when compiled on Buster with the RTAI kernel.
Dewey found a fix, but so far we don't understand it: https://github.com/LinuxCNC/linuxcnc/commit/ef6f36a16c7789af258d34adf4840d965f4c0b10 What is more confusing is that keeping the init loop and adding back the ={ 0 } initialiser brings back the lock-up crash. I was so baffled I asked on Stack Overflow: https://stackoverflow.com/questions/60589636/what-can-cause-c-code-to-crash-when-an-array-is-initialised-at-declaration-but Someone there set up a test system that shows the compiler output for various compilers. Dewey then found that the problem does not occur with gcc-6. Buster defaults to gcc-8.3. Playing around with the online tool linked to from the SO thread shoes that gcc-8.3 uses the xmm0 register, and gcc-6.3 does not. There is a suggestion that xmm should not be used in kernel code. Any ideas? -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
