On Thu, 2009-06-25 at 13:32 -0700, Ian Lance Taylor wrote:
> I am pleased to report that if you configure gcc with
> --enable-build-with-cxx, which causes the core compiler to be built
> using a C++ compiler, a bootstrap on x86_64-unknown-linux-gnu now
> completes.
> 
> 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.

Hi,

Wanting to test Ada on the branch, after checkout I did on x86_64-linux:

../gcc/configure --enable-languages=c,c++,ada --enable-__cxa_atexit
--disable-nls --enable-threads=posix --with-mpfr=/opt/cfarm/mpfr-2.4.1/
--with-gmp=/opt/cfarm/gmp-4.2.4/  --prefix=/n/16/guerby/cxx/install
--enable-build-with-cxx

make bootstrap
...
g++ -c  -g -g -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wmissing-format-attribute -fno-common  -DHAVE_CONFIG_H -I. -I.
-I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include
-I../../gcc/gcc/../libcpp/include -I/opt/cfarm/gmp-4.2.4//include
-I/opt/cfarm/mpfr-2.4.1//include -I../../gcc/gcc/../libdecnumber
-I../../gcc/gcc/../libdecnumber/bid
-I../libdecnumber    ../../gcc/gcc/c-decl.c -o c-decl.o
/usr/include/libintl.h:40: error: expected unqualified-id before ‘const’
/usr/include/libintl.h:40: error: expected `)' before ‘const’
/usr/include/libintl.h:40: error: expected initializer before ‘const’
/usr/include/libintl.h:81: error: expected unqualified-id before ‘const’
/usr/include/libintl.h:81: error: expected `)' before ‘const’
/usr/include/libintl.h:81: error: expected initializer before ‘const’
/usr/include/libintl.h:85: error: expected unqualified-id before ‘const’
/usr/include/libintl.h:85: error: expected `)' before ‘const’
/usr/include/libintl.h:85: error: expected initializer before ‘const’
../../gcc/gcc/c-decl.c: In function ‘tree_node* finish_enum(tree_node*,
tree_node*, tree_node*)’:
../../gcc/gcc/c-decl.c:7011: warning: comparison between signed and
unsigned integer expressions
../../gcc/gcc/c-decl.c:7032: warning: comparison between signed and
unsigned integer expressions
make[3]: *** [c-decl.o] Error 1
make[3]: Leaving directory `/home/guerby/cxx/build/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory `/home/guerby/cxx/build'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/guerby/cxx/build'
make: *** [bootstrap] Error 2

Given the error is in non Ada-related code I guess this has to do
with the base C++ compiler and system headers in C++ mode, gcc16 is
running Debian 4.0 and GCC 4.1.2 (which works for trunk bootstrap of c,c
++,ada):

gue...@gcc16:~/cxx/build$ g++ --version
g++ (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)

gcc16 has a collection of GCC versions:
gue...@gcc16:~/cxx/build$ ls /opt/cfarm/release/
4.2.0  4.2.1  4.2.2  4.2.3  4.2.4  4.3.0  4.3.1  4.3.2  4.3.3  4.4.0

Using 4.2.3 as base compiler failed with the same error as system 4.1.2.

Using 4.3.3 and 4.4.0 as base compiler bootstrap failed on Ada-related
stuff, here gcc/ada/gcc-interface/decl.c:

g++ -c  -g -g -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual   -fno-common  
-DHAVE_CONFIG_H -I.. -I. -Iada -I../../gcc/gcc -I../../gcc/gcc/ada 
-I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include -\
I/opt/cfarm/gmp-4.2.4//include -I/opt/cfarm/mpfr-2.4.1//include 
-I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/bid 
-I../libdecnumber    ../../gcc/gcc/ada/gcc-interface/decl.c -o ada/decl.o
../../gcc/gcc/ada/gcc-interface/decl.c: In function 'tree_node* 
substitute_in_type(tree_node*, tree_node*, tree_node*)':
../../gcc/gcc/ada/gcc-interface/decl.c:7791: error: expected unqualified-id 
before 'new'
../../gcc/gcc/ada/gcc-interface/decl.c:7812: error: expected type-specifier 
before '=' token
../../gcc/gcc/ada/gcc-interface/decl.c:7812: error: lvalue required as left 
operand of assignment
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: expected type-specifier 
before ')' token
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: request for member 'base' 
in '*(int*)__t', which is of non-class type 'int'
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: request for member 'base' 
in '*(int*)__t', which is of non-class type 'int'
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: request for member 'base' 
in '*(int*)__t', which is of non-class type 'int'
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: request for member 'base' 
in '*(int*)__t', which is of non-class type 'int'
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: request for member 'base' 
in '*(int*)__t', which is of non-class type 'int'
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: cannot convert 'int* const' 
to 'const tree_node*' for argument '1' to 'void tree_check_failed(const 
tree_node*, const char*, int, const char*, ...)'
../../gcc/gcc/ada/gcc-interface/decl.c:7813: error: request for member 'type' 
in '*({...})', which is of non-class type 'int'
../../gcc/gcc/ada/gcc-interface/decl.c:7814: error: expected type-specifier 
before ')' token
[...]
make[3]: *** [ada/decl.o] Error 1
make[3]: Leaving directory `/home/guerby/cxx/build/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory `/home/guerby/cxx/build'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/guerby/cxx/build'
make: *** [bootstrap] Error 2

I guess this has to do with reserved word conflict on "new":

<<
tree
substitute_in_type (tree t, tree f, tree r)
{
  tree new;
>>

Do you have some way to deal with this?

Sincerely,

Laurent



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