Re: Phase 1 of gcc-in-cxx now complete

[Adam Nemet <anemet@caviumnetworks.com>]

Ian Lance Taylor <iant@google.com> writes:
> I would like to encourage people to try using --enable-build-with-cxx in
> other configuration--other bootstraps, cross-compilers--to see how well
> it works.  Please let me know if you run into problems that you don't
> know how, or don't have time, to fix.

With GMP 4.2.1 build fails like this:

g++ -mabi=n32 -c  -g -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H -I. -I. -I../../src/gcc -I../../src/gcc/. -I../../src/gcc/../include -I../../src/gcc/../libcpp/include  -I../../src/gcc/../libdecnumber -I../../src/gcc/../libdecnumber/dpd -I../libdecnumber
../../src/gcc/c-lang.c -o c-lang.o
In file included from ../../src/gcc/double-int.h:24,
                 from ../../src/gcc/tree.h:30,
                 from ../../src/gcc/c-lang.c:27:
//usr/include/gmp.h:515: error: 'std::FILE' has not been declared
make[3]: *** [c-lang.o] Error 1
make[3]: Leaving directory `/mnt/src/gcc-tmp/mips64octeon-linux/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory `/mnt/src/gcc-tmp/mips64octeon-linux'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/mnt/src/gcc-tmp/mips64octeon-linux'
make: *** [all] Error 2

We need at least GMP 4.2.3 with --enable-build-with-cxx:

From <http://gmplib.org/gmp4.2.html>:

Changes in GMP 4.2.3
Bugs:

    ...
    * For C++, gmp.h now includes cstdio, improving compiler
    compatibility. 
    ...

Adam