[Bug other/46333] problems with configure -enable-build-with-cxx -disable-bootstrap

["marc.glisse at normalesup dot org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46333

Marc Glisse <marc.glisse at normalesup dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |marc.glisse at normalesup
                   |                            |dot org

--- Comment #21 from Marc Glisse <marc.glisse at normalesup dot org> 2011-09-04 20:08:49 UTC ---
Since I went through the same thing recently:

(In reply to comment #0)
> ENUM_BITFIELD mixes integers and enums.
> Fix:
> #if (GCC_VERSION > 2000)
> #define ENUM_BITFIELD(TYPE, NAME, SIZE) __extension__ enum TYPE NAME : SIZE
> #elif defined(__cplusplus)
> #define ENUM_BITFIELD(TYPE, NAME, SIZE) enum TYPE NAME
> #else
> #define ENUM_BITFIELD(TYPE, NAME, SIZE) unsigned int
> #endif

Patch posted at:
http://gcc.gnu.org/ml/gcc-patches/2011-08/msg00758.html

> some problem with obstack_free, I didn't investigate.
> Maybe substraction involving void* NULL or 0?
> Fix, obstack.h before:
> Before:
> # define obstack_free(h,obj)                        \
> ( (h)->temp = (char *) (obj) - (char *) (h)->chunk,            \
> 
> After, add cast to char*:
> # define obstack_free(h,obj)                        \
> ( (h)->temp = (char *) ((char*)(obj)) - (char *) (h)->chunk,            \

Bug in sunpro, reported and fixed in the development version (but possibly not
for 12.3).

>  There are also problems then compiling gmp in tree.
>  I had to remove its #include <iosfwd> on Solaris because
>  that pulled in locale and there was some problem.
>     Maybe due to local hacks? I removed all the locale stuff from my gcc/gmp.

CC is not a standard C++ compiler, you have to add -library=stlport4 to get it
to even try.


(In reply to comment #1)
> also lots of warnings about mixing extern "C" and not:

Seems ok to ignore those that are only warnings.

> and other errors related, mixing said in ternary, like:
> 
> foo = foo2 ? foo2 : foo3;
>  (as in reallocator = set->reallocator ? set->reallocator : xrealloc)
> 
> 
> where foo2 and foo3 vary in extern C-ness.
> workaround is
> foo = foo2
> if (!foo)
>   foo = foo3
> 
> even though that doesn't seem different enough -- I understand there is the
> problem of figuring out a type for the ternary operator, but there is also the
> matter of being able to assign the function pointers

This one is also Bug 50177. There is also Bug 50167.

> here's an example of the obtack_free problem, either I didn't get all the
> obstack.h files fixed or the cast needs to be void* or something:
> 
> "../../gcc-4.5/libcpp/files.c", line 1193: Error: Cannot assign char* to int.

Patch posted at:
http://gcc.gnu.org/ml/gcc-patches/2011-08/msg00758.html

(In reply to comment #7)
> rtl.c, change:
> 
> #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   sizeof FORMAT - 1 ,
> 
> to:
> 
> #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   sizeof (FORMAT) - 1 ,
> 
> seems to work. Seems preferable too.

Bug in sunpro, reported and fixed in the development version (but possibly not
for 12.3).