Build of egcs-971114 again fails with `C function `doublehypot(double, double)' conflicts with ...'

[Toon Moene]

I changed the include order in config/nextstep.h to:

    { GPLUSPLUS_INCLUDE_DIR, 1, 1 },                    \
    { GPLUSPLUS_INCLUDE_DIR "/ansi", 1, 1 },            \
    { GPLUSPLUS_INCLUDE_DIR "/bsd", 1, 1 },             \
    { LOCAL_INCLUDE_DIR, 0, 1 },                        \
    { TOOL_INCLUDE_DIR, 0, 1 },                         \
    { GCC_INCLUDE_DIR, 0, 0 },                          \
    /* These are for fixincludes-fixed ansi/bsd headers \
       which wouldn't be found otherwise.               \
       (The use of string catenation here is OK since   \
        NeXT's native compiler is derived from GCC.) */ \
    { GCC_INCLUDE_DIR "/ansi", 0, 0 },                  \
    { GCC_INCLUDE_DIR "/bsd", 0, 0 },                   \
    { "/NextDeveloper/Headers", 0, 0 },                 \
    ....

Unfortunately, that is not even useless, it's incorrect  
(GPLUSPLUS_INCLUDE_DIR has nothing to do with my problem).  The  
point is that GCC_INCLUDE_DIR doesn't exist yet at the moment the  
build of libraries/libstdc++ goes wrong and this list assumes it  
does.

This is passed as GCC_INCLUDE_DIR (quoting the Makefile):

% grep GCC_INCLUDE gcc/Makefile
          -DGCC_INCLUDE_DIR=\"$(libsubdir)/include\" \

libsubdir is $(libdir)/gcc-lib/$(target_alias)/$(version)

libdir is ${exec_prefix}/lib

and exec_prefix is ${prefix} is /usr/test.

This means that as-is, on m68k-next-nextstep3, you can only build  
libraries/libstdc++ once the compiler is installed, and not half  
way.

Unfortunately, I am not a hacker of Makefiles, nor a wizard of  
autoconf, so I'll drop the ball right here.

HTH,
Toon.

"Fortran is our Forte"