Re: Shared C++ libs on i386-pc-solaris2.5.1

[James Macnicol <m9305357@bohm.anu.edu.au>]

>         -Tcl 8.0 will not build with egcs-970904 since "__ctype" is not found
>         by
>         the linker.  Tcl 8.0 compiles fine with gcc 2.7.2.2.
> 
> I was just discussing a similar problem with one of the i386-sco5 users.
> Was this a shared library build?  The following info may be useful.
> 
> --
> 
> Gcc is emitting a reference to __ctype into the constant pool.  This is
> a place where constants are stored if they aren't valid as immediates in
> an instruction.  This is for instance where floating point constants are
> stored.
> 
> This is happening because of a change to the cse pass, which is causing
> some constants to be forced into the constant pool that weren't before.
> This is a somewhat questionable optimization, since it may increase the
> size of the program without giving faster code.  In any case, if you compile
> with -O2, the constant pool itself is optimized, and unused constants are
> removed.  So this problem goes away at -O2.
> 
> This constant pool entry should have gone into the the readonly data section
> (or into the data section), instead of the default text section.
> 
> This change was copied from the svr4.h file, so I suspect that it will
> fix your problem.
> 
> If not, then try the definition of SELECT_RTX_SECTION from sparc/sysv4.h.
> This will put the constant pool entry into the data section.
> 
> Tue Sep  9 16:29:42 1997  Jim Wilson  <wilson@cygnus.com>
> 
>         * i386/sco5.h (READONLY_DATA_SECTION): Define.
> 
> Index: sco5.h
> ===================================================================
> RCS file: /cvs/cvsfiles/egcs/gcc/config/i386/sco5.h,v
> retrieving revision 1.1.1.1
> diff -p -r1.1.1.1 sco5.h
> *** sco5.h      1997/08/11 15:57:18     1.1.1.1
> --- sco5.h      1997/09/09 23:27:54
> *************** do {                                                                    \
> *** 573,578 ****
> --- 573,580 ----
>     CTORS_SECTION_FUNCTION                                              \
>     DTORS_SECTION_FUNCTION
> 
> + #define READONLY_DATA_SECTION() const_section ()
> +
>   #undef CONST_SECTION_FUNCTION
>   #define CONST_SECTION_FUNCTION                                                \
>   void                                                                  \

	Alas, this isn't the solution for i386-pc-solaris2.5.1.
READONLY_DATA_SECTION() is already defined as above in 
gcc/config/i386/svr4.h which is included in the Solaris x86 config.

	Rebuilding Tcl 8.0 with -O2 also does not remove the
error.

	Something I forgot in the original post was to say that
gcc/objc/archive.c needs a dose of <stdarg.h> to pick up the va_*
macros.



James