1.1 guiding-decls inconsistency

[Andrew Fitzgibbon]

The code below produces different results with/without -DTICKLE, under
-fguiding-decls.

     
     #include <iostream.h>
     
     template <class T> struct A;
     
     template <class T>
     struct A {
       friend ostream& operator<<(ostream&, const A<T>&);
     };
     
     #ifdef TICKLE
     A<bool> dummy;
     #endif
     
     void f(const A<bool>& a)
     {
       cout << a;
     }

>From my reading of CD2, the friend should either declare the template or
not, it shouldn't depend on tickling.  Without guiding-decls the behaviour
is the same, but at least it warns.

ia:cctests[1539]% egcs -v egcs-bugs.cc -DTICKLE
Reading specs from /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/specs
gcc version egcs-2.91.57 19980901 (egcs-1.1 release)
 /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/cpp -lang-c++ -v -undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -D__GNUC_MINOR__=91 -Dsparc -Dsun -Dunix -D__svr4__ -D__SVR4 -D__sparc__ -D__sun__ -D__unix__ -D__svr4__ -D__SVR4 -D__sparc -D__sun -D__unix -Asystem(unix) -Asystem(svr4) -D__EXCEPTIONS -D__GCC_NEW_VARARGS__ -Acpu(sparc) -Amachine(sparc) -DTICKLE egcs-bugs.cc /var/tmp/ccT3y4HA.ii
GNU CPP version egcs-2.91.57 19980901 (egcs-1.1 release) (sparc)
#include "..." search starts here:
#include <...> search starts here:
 /homes/39/pkg/include/g++
 /homes/39/pkg/lib/g++-include
 /usr/local/include
 /homes/39/pkg/sparc-sun-solaris2.6/include
 /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/include
 /usr/include
End of search list.
 /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/cc1plus /var/tmp/ccT3y4HA.ii -quiet -dumpbase egcs-bugs.cc -version -o /var/tmp/ccihD602.s
GNU C++ version egcs-2.91.57 19980901 (egcs-1.1 release) (sparc-sun-solaris2.6) compiled by GNU C version 2.7.2.3.
egcs-bugs.cc:17: warning: friend declaration `class ostream & operator <<(class ostream &, const struct A<T> &)'
egcs-bugs.cc:17: warning:   declares a non-template function
egcs-bugs.cc:17: warning:   (if this is not what you intended, make sure
egcs-bugs.cc:17: warning:   the function template has already been declared,
egcs-bugs.cc:17: warning:   and add <> after the function name here)
 /usr/ccs/bin/as -V -Qy -s -o /var/tmp/ccNvWSrP.o /var/tmp/ccihD602.s
/usr/ccs/bin/as: WorkShop Compilers 4.X dev 18 Sep 1996
 /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/collect2 -V -Y P,/usr/ccs/lib:/usr/lib -Qy /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/crt1.o /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/crti.o /usr/ccs/lib/values-Xa.o /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/crtbegin.o -L/homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57 -L/homes/39/pkg/sparc-sun-solaris2.6/lib -L/usr/ccs/bin -L/usr/ccs/lib -L/homes/39/pkg/lib /var/tmp/ccNvWSrP.o -lstdc++ -lm -lgcc -lc -lgcc /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/crtend.o /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/crtn.o
ld: Software Generation Utilities - Solaris/ELF (3.0)
Undefined                       first referenced
 symbol                             in file
operator<<(ostream &, A<bool> const &)/var/tmp/ccNvWSrP.o
main                                /homes/39/pkg/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/crt1.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status
volumnia:cctests[1540]% egcs egcs-bugs.cc
egcs-bugs.cc:17: warning: friend declaration `class ostream & operator <<(class ostream &, const struct A<T> &)'
egcs-bugs.cc:17: warning:   declares a non-template function
egcs-bugs.cc:17: warning:   (if this is not what you intended, make sure
egcs-bugs.cc:17: warning:   the function template has already been declared,
egcs-bugs.cc:17: warning:   and add <> after the function name here)
egcs-bugs.cc: In function `void f(const struct A<bool> &)':
egcs-bugs.cc:26: no match for `_IO_ostream_withassign & << const A<bool> &'
/homes/39/pkg/include/g++/iostream.h:77: candidates are: ostream::operator <<(char)
/homes/39/pkg/include/g++/iostream.h:78:                 ostream::operator <<(unsigned char)
/homes/39/pkg/include/g++/iostream.h:79:                 ostream::operator <<(signed char)
/homes/39/pkg/include/g++/iostream.h:80:                 ostream::operator <<(const char *)
/homes/39/pkg/include/g++/iostream.h:82:                 ostream::operator <<(const unsigned char *)
/homes/39/pkg/include/g++/iostream.h:84:                 ostream::operator <<(const signed char *)
/homes/39/pkg/include/g++/iostream.h:85:                 ostream::operator <<(const void *)
/homes/39/pkg/include/g++/iostream.h:86:                 ostream::operator <<(int)
/homes/39/pkg/include/g++/iostream.h:87:                 ostream::operator <<(unsigned int)
/homes/39/pkg/include/g++/iostream.h:88:                 ostream::operator <<(long int)
/homes/39/pkg/include/g++/iostream.h:89:                 ostream::operator <<(long unsigned int)
/homes/39/pkg/include/g++/iostream.h:91:                 ostream::operator <<(long long int)
/homes/39/pkg/include/g++/iostream.h:92:                 ostream::operator <<(long long unsigned int)
/homes/39/pkg/include/g++/iostream.h:94:                 ostream::operator <<(short int)
/homes/39/pkg/include/g++/iostream.h:95:                 ostream::operator <<(short unsigned int)
/homes/39/pkg/include/g++/iostream.h:97:                 ostream::operator <<(bool)
/homes/39/pkg/include/g++/iostream.h:99:                 ostream::operator <<(double)
/homes/39/pkg/include/g++/iostream.h:100:                 ostream::operator <<(float)
/homes/39/pkg/include/g++/iostream.h:104:                 ostream::operator <<(long double)
/homes/39/pkg/include/g++/iostream.h:106:                 ostream::operator <<(ostream & (*)(ostream &))
/homes/39/pkg/include/g++/iostream.h:107:                 ostream::operator <<(ios & (*)(ios &))
/homes/39/pkg/include/g++/iostream.h:108:                 ostream::operator <<(streambuf *)