Re: build/955: build failure with GDB-5.3: sparc-nat.c structure redefinition errors with sparc64-linux, glibc-2.2.x

[Christian Joensson <christian@j-son.org>]

On Wed, Oct 08, 2003 at 08:29:05AM +0100, Nix wrote:
> On Mon, 25 Aug 2003, Christian Joensson uttered the following:
> > uhm, just tried gdb cvs HEAD, as of Sun Aug 24 12:01:38 UTC 2003, same thing:
> 
> I'm back, at last.
> 
> > In file included from /usr/include/asm/reg.h:7,
> >                  from /home/chj/src/gdb/sparc-nat.c:38:
> > /usr/include/asm-sparc64/reg.h:49: error: redefinition of `struct fpu'
> 
> sparc64? Are you trying to build a 64-bit gdb?

uhm, yes, to debug 64-bit binaries....

> This is *not* related to the earlier bug in sparc-nat.c / the Linux
> kernel headers / the glibc headers that the earlier patch from Daniel
> Jacobowitz was for. That patch works (Debian uses it).

ok 
 
> Using GDB-6.0-release, I now see
> 
> gcc -c -O2  -mcpu=ultrasparc -mtune=ultrasparc -m32 -g -pipe -D__NO_STRING_INLINES -D__NO_MATH_INLINES -D_FILE_OFFSET_BITS=64     -I. -I. -I./config -DLOCALEDIR="\"/usr/share/locale\"" -DHAVE_CONFIG_H -I./../include/opcode -I./../readline/.. -I../bfd -I./../bfd  -I./../include -I../intl -I./../intl  -DMI_OUT=1 -DTUI=1 -I./tui -Wimplicit -Wreturn-type -Wcomment -Wtrigraphs -Wformat -Wparentheses -Wpointer-arith -Wuninitialized  sparc-nat.c
> sparc-nat.c: In function `fetch_inferior_registers':
> sparc-nat.c:115: error: structure has no member named `r_ps'
> sparc-nat.c:117: error: structure has no member named `r_pc'
> sparc-nat.c:119: error: structure has no member named `r_npc'
> sparc-nat.c: In function `store_inferior_registers':
> sparc-nat.c:266: error: structure has no member named `r_ps'
> sparc-nat.c:268: error: structure has no member named `r_pc'
> sparc-nat.c:270: error: structure has no member named `r_npc'
> sparc-nat.c: In function `fetch_core_registers':
> sparc-nat.c:326: error: structure has no member named `r_ps'
> sparc-nat.c:327: error: structure has no member named `r_pc'
> sparc-nat.c:328: error: structure has no member named `r_npc'
> make[1]: *** [sparc-nat.o] Error 1
> 
> building on an UltraSPARC via the sparc32 personality.

ok, but I try to build, using 64-bit versions of binutils, gcc, and
ncurses, a 64-bit one...
 
> ... further investigation shows that at some time in the distant past,
> something, somehow replaced the sparc32 reg.h in my copy of the kernel
> sources with the sparc64 one. (Probably it was me in an earlier
> debugging run, by accident.) Because my kernel is sparc64 and nothing
> much other than GDB uses this header in userspace, I'd not noticed.
> 
> Putting the sparc32 reg.h back, combined with code to use the right
> kernel headers for the target (i.e. sparc32) made everything work.
> 
> If your bug has similar causes to mine --- at least one sparc64 header
> being picked up instead of a sparc32 one, in a 32-bit userspace --- I'd
> call this user error. I'd also call the sparc64 reg.h header `not ready
> for gdb' since symbols present since at least 1989 which gdb relies on
> are not there.

I see, well, maybe that will be addressed sometime 
> 
> (It probably makes sense to replace the kernel headers in
> /usr/include/asm with something like the multi-personality
> jiggery-pokery normally used to build glibc, i.e. autogenerated headers
> looking like
> 
> #ifndef __MULTIUNIVERSE__REG_H__
> #define __MULTIUNIVERSE__REG_H__
> 
> #ifdef __arch64__
> #include "sparc64/reg.h"
> #else
> #include "sparc/reg.h"
> #endif
> 
> #endif /* !__MULTIUNIVERSE__REG_H__ */
> 
> and all the sparc64 and sparc32 headers in the appropriate
> subdirectories.
> 
> If you've not done that, you could also find yourself picking up sparc64
> headers instead of sparc32 ones, and getting bitten by this.
> 
> If you're using a Linux distro of some kind, I'd imagine they've already
> done this.)

uhm, a 64-bit gdb is not that easy to accomplish, I guess, but
there'll be one in a future Aurora SPARC Linux, a development
gdb64-5.2-ish src rpm is available:
ftp://auroralinux.org/pub/aurora/scratch

Cheers,

/ChJ