MIPS64 GCC not building at r165246

[Richard Sandiford]

David Daney <david.s.daney@gmail.com> writes:
>   Hi Richard,
>
> I was just trying to build the trunk GCC at r165246
>
> Configured thusly:
>
> $ ../trunk/configure --target=mips64-linux 
> --with-sysroot=/home/daney/mips64-linux 
> --prefix=/home/daney/mips64-linux --with-arch=mips64r2 
> --enable-languages=c --disable-libmudflap
>
> Back on:
> r162086 | rsandifo | 2010-07-12 11:53:01 -0700 (Mon, 12 Jul 2010) | 36 lines
>
> gcc/
> * doc/tm.texi.in (SWITCHABLE_TARGET): Document.
> [...]
>
> You added SWITCHABLE_TARGET, but it seems to break building now in expr.c
>
> gcc -c -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall 
> -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes 
> -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros 
> -Wno-overlength-strings -Wold-style-definition -Wc++-compat -fno-common 
> -DHAVE_CONFIG_H -I. -I. -I../../trunk/gcc -I../../trunk/gcc/. 
> -I../../trunk/gcc/../include -I../../trunk/gcc/../libcpp/include 
> -I../../trunk/gcc/../libdecnumber -I../../trunk/gcc/../libdecnumber/dpd 
> -I../libdecnumber -I/usr/include/libelf ../../trunk/gcc/expr.c -o expr.o
> In file included from ../../trunk/gcc/expr.c:57:
> ../../trunk/gcc/target-globals.h:24: error: expected identifier or ‘(’ 
> before ‘&’ token
> ../../trunk/gcc/target-globals.h: In function ‘restore_target_globals’:
> ../../trunk/gcc/target-globals.h:63: error: lvalue required as left 
> operand of assignment
>
>
> This seems to be caused by:
>
> flags.h:243 #define this_target_flag_state (&default_target_flag_state)
>
> target-globals.h:24 extern struct target_flag_state *this_target_flag_state;
>
> Which when preprocessed we get:
>
> expr.i:??? extern struct target_flag_state *(&default_target_flag_state);
>
> Which evidently is not valid C.
>
> I am not sure how to go about fixing this.

You're behind on gcc-patches. :-)  See:

  http://gcc.gnu.org/ml/gcc-patches/2010-10/msg00780.html

Richard