[Pkg-scicomp-devel] Bug#519126: qrupdate fails to build in Debian on some architectures

[peter green]

>The bug is about an optimisation flag that we shouldn't just get rid
>of. At some point soon, I'll read the gcc manpage and figure out what
>a proper flag for other architectures should be.

http://gcc.gnu.org/onlinedocs/gcc-4.3.3/gcc/i386-and-x86_002d64-Options.html#i386-and-x86_002d64-Options has the following to say about -march=native


/native/
    This selects the CPU to tune for at compilation time by determining
    the processor type of the compiling machine. Using -mtune=native
    will produce code optimized for the local machine under the
    constraints of the selected instruction set. Using -march=native
    will enable all instruction subsets supported by the local machine
    (hence the result might not run on different machines). 


In other words this flag is totally inappropriate for a binary distribution like debian.