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Re: [PATCH] PR gdb/21070: Build fix for MIPS with musl libc
On Mon, 23 Jan 2017, Maciej W. Rozycki wrote:
> > > This issue has been reported in crosstool-ng; the patch is from
> > > OpenEmbedded. Quoting the description from the patch:
> > >
> > > [[[[
> > > The MIPS specific header <sgidefs.h> is provided by glibc and uclibc
> > > but not by musl. Regardless of the libc, the kernel headers provide
> > > <asm/sgidefs.h> which provides the same definitions, so use that
> > > instead.
> > > ]]]]
>
> It's a bug in musl then, the header is a part of the MIPS/Linux user API.
> OTOH <asm/sgidefs.h> is an internal kernel header and shouldn't really be
> used by user software.
NB the published API set out by SGI is actually <sys/asm.h> [1][2][3]
rather than <sgidefs.h>, so if musl does the right thing via the former
header then I'll be happy to accept a patch to switch. Otherwise I'll be
closing the bug as invalid.
References:
[1] "MIPSpro Compiling and Performance Tuning Guide", Silicon Graphics,
Inc., Document Number 007-2360-008, Section 6.3.2 "Using Predefined
Types", p. 135
<http://techpubs.sgi.com/library/manuals/2000/007-2360-008/pdf/007-2360-008.pdf>
[2] "MIPSpro 64-Bit Porting and Transition Guide", Silicon Graphics, Inc.,
Document Number 007-2391-006, Section "Using a Different Subrouting
Linkage", p. 45
<http://techpubs.sgi.com/library/manuals/2000/007-2391-006/pdf/007-2391-006.pdf>
[3] "MIPSpro N32 ABI Handbook", Silicon Graphics, Inc., Document Number
007-2816-004, Section "Using a Different Subroutine Linkage", p. 22
<http://techpubs.sgi.com/library/manuals/2000/007-2816-004/pdf/007-2816-004.pdf>
Maciej