From mboxrd@z Thu Jan  1 00:00:00 1970
From: Erik Corry <erik@arbat.com>
To: egcs@cygnus.com
Subject: Static members in templates in egcs-1.0.1
Date: Mon, 12 Jan 1998 20:31:00 -0000
Message-id: <19980113003940.34725@arbat.com>
X-SW-Source: 1998-01/msg00336.html

Hi,

I obtained egcs-1.0.1 and compiled it with the naive

./configure
make
make install

on my i586-pc-linux-gnu system with glibc-2.0.5c-10, gcc-2.7.2.3-8
and binutils-2.8.1.0.1-1 installed. It seems I can now use
egcs as /usr/local/bin/gcc, which is cool.

But it seems that static members of templates still don't work:

  template <class T>
  struct B
  {
    static T mycounter = 0;           // with static - doesn't work with egcs
    //T mycounter;                    // without static - works with egcs
    void IncCounter() {mycounter++;}
  };
  
  int
  main()
  {
    B<int> a;
    a.IncCounter();
    return 0;
  }
  
when I compile with

  /usr/local/bin/gcc -o smt static_simple.cpp

I get

  /tmp/cca283291.o: In function `B<int>::IncCounter(void)':
  /tmp/cca283291.o(.B<int>::gnu.linkonce.t.IncCounter(void)+0x8): undefined reference to `B<int>::mycounter'

with -v, that's

  Reading specs from /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23/specs
  gcc version egcs-2.90.23 980102 (egcs-1.0.1 release)
   /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23/cpp -lang-c++ -v -undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -D__GNUC_MINOR__=90 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem(posix) -D__EXCEPTIONS -Di386 -Di586 -Asystem(unix) -Acpu(i386) -Amachine(i386) -D__i386__ -D__i586__ -Asystem(unix) -Acpu(i386) -Amachine(i386) static_simple.cpp /tmp/cca28614.ii
  GNU CPP version egcs-2.90.23 980102 (egcs-1.0.1 release) (i386 Linux/ELF)
  #include "..." search starts here:
  #include <...> search starts here:
   /usr/local/include
   /usr/local/i586-pc-linux-gnu/include
   /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23/include
   /usr/include
  End of search list.
   /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23/cc1plus /tmp/cca28614.ii -quiet -dumpbase static_simple.cc -version -o /tmp/cca28614.s
  GNU C++ version egcs-2.90.23 980102 (egcs-1.0.1 release) (i586-pc-linux-gnu) compiled by GNU C version 2.7.2.3.
   as -V -Qy -o /tmp/cca286141.o /tmp/cca28614.s
  GNU assembler version 2.8.1 (i686-pc-linux-gnu), using BFD version linux-2.8.1.0.1
   /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23/ld -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o smt /usr/lib/crt1.o /usr/lib/crti.o /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23/crtbegin.o -L/usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23 -L/usr/local/lib /tmp/cca286141.o -lgcc -lc -lgcc /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.90.23/crtend.o /usr/lib/crtn.o
  /tmp/cca286141.o: In function `B<int>::IncCounter(void)':
  /tmp/cca286141.o(.B<int>::gnu.linkonce.t.IncCounter(void)+0x8): undefined reference to `B<int>::mycounter'
  collect2: ld returned 1 exit status


So perhaps:

* I installed it wrong
  I couldn't find any egcs-specific installation instructions
  so I used the ones in the toplevel README.

* It just doesn't work yet

* I misunderstood how statics in templates were supposed to work

* I need -frepo or something - there doesn't seem to be much
  in the doc on this either. When I use -frepo I get .rpo files,
  - do I need to tell the linker to use them?

or

* Something else.

-- 
Erik Corry