On Thu, Sep 27, 2007 at 10:11:49AM +0200, Franck Bui-Huu wrote: > From: Franck Bui-Huu <vagabon.xyz@xxxxxxxxx> > Date: Thu, 27 Sep 2007 10:11:49 +0200 > To: "Maciej W. Rozycki" <macro@xxxxxxxxxxxxxx> > CC: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>, tbm@xxxxxxxxxx, > linux-mips@xxxxxxxxxxxxxx > Subject: Re: CONFIG_BUILD_ELF64 broken on IP32 since 2.6.20 > Content-Type: text/plain; charset=ISO-8859-1 > > Maciej W. Rozycki wrote: > > On Thu, 27 Sep 2007, Atsushi Nemoto wrote: > > > >> Current linux-queue code adds -msym32 if the load address was CKSEG0, > >> so it can not be compiled with gcc 3.x. I think this patch fixes the > >> problem: > >> > >> http://www.linux-mips.org/archives/linux-mips/2007-03/msg00404.html > > > > It looks like it should -- why hasn't it been pushed? > > > > I don't remember. I thought the last patchset had the fix. > > Just to be sure I understand both of you correctly, could > you confirm that in case of '-msym32' switch isn't supported, > we should _silently_ drop this option ? That's what Atsushi > was suggesting. But reading what Maciej wrote, it seems that > we should notify the user... -msym32 and previously the strategy to tell the compiler to generate 64-bit code but the assembler to put it into 32-bit ELF was initially a hack to get around the lack of proper 64-bit binutils support and later turned into a neat optimization with significant code size savings. But it's really just an optimization so there is nothing wrong with just dropping the option (and whatever else goes along with it, I forgot all the nasty details) on the floor if due to a vintage compiler it can't be suported. Ralf
