A dumb mistake
by Yi Zhang
This dumb mistake made me debugging for a whole night….
I am trying to solve a linear system using SGESV.f, a standard procedure. OK, source file is done, and compiled under Sun Studio 10, using
But running the a.out gave me ‘Segmentation fault’ . And debugging using dbx gave me “access to address exceeded protections”. What I didn’t realize was that the arguments of SGESV.f is set to be ‘PARAMETER’, and it was two hours later when I found it out:
Of course the address was “protected”!