RFC: RPM build flags

[Jon Masters]

Folks,

In the meeting on #fedora-meeting just now I discovered the i586 arch
changes weren't specific just to kernel but that the entire 32-bit
userspace is being switched to i586 instead of i386 as a default. Most
of that is koji (it makes builds for i586 instead of i386) but there was
a request to look at flags.

Currently, we build i386 packages with the following:

optflags: i386 %{__global_cflags} -m32 -march=i386
-mtune=generic -fasynchronous-unwind-tables

And we build i586 packages with the following:

optflags: i586 %{__global_cflags} -m32 -march=i586
-fasynchronous-unwind-tables

So the proposal is to change i586 to be in line with i386:

optflags: i586 %{__global_cflags} -m32 -march=i586
-mtune=generic -fasynchronous-unwind-tables

While we're at it, didn't spot and/or someone else want to tweak sparc
build flags too? Now would be a good time to let us know :)

Jon.