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From: "Alex Vinokur" <alexvn AT bigfoot DOT com>
Newsgroups: comp.os.msdos.djgpp,comp.lang.c++
Subject: Different results of compilation with gpp 2.95.3 and 3.0.4
Date: Thu, 21 Mar 2002 13:31:28 +0200
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To: djgpp AT delorie DOT com
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Here is some code.
It had no problem with gpp -> GNU C++ version 2.95.3 20010315/djgpp .

What has been changed in gpp -> GNU C++ version 3.0.4 (djgpp) ?

Does it mean that gpp version 2.95.3 is inconsistent with C++ Standard?

  Thanks.


===============================================================
Windows-2000
gpp : GNU C++ version 3.0.4 (djgpp)

%gpp -v
 Reading specs from c:/djgpp/lib/gcc-lib/djgpp/3.04/specs
 Configured with: ../configure
i586-pc-msdosdjgpp --prefix=/dev/env/DJDIR --disable-nls
 Thread model: single
 gcc version 3.0.4
===============================================================


|======= C++-code : BEGIN ========
#include <iostream>
#include <string>
#include <sstream>

template <typename T>
string to_string (const T& val_i)
{
ostringstream osstr;
  osstr << val_i;
  return osstr.str();
}

int main()
{
  cout << to_string (123) << endl;
  return 0;
}

|======= C++-code : END ==========

|====== Compilation : BEGIN ======

%gpp -v main.c

Reading specs from c:/djgpp/lib/gcc-lib/djgpp/3.04/specs
Configured with: ../configure
i586-pc-msdosdjgpp --prefix=/dev/env/DJDIR --disable-nls
Thread model: single
gcc version 3.0.4
 c:/djgpp/lib/gcc-lib/djgpp/3.04/cc1plus.exe -remap -imacros
c:/djgpp/lib/gcc-lib/djgpp/3.04/djgpp.ver -v -D__GNUC__=3 -D__GNUC_MINOR__=0
 -D__GNUC_PATCHLEVEL__=4 -D__MSDOS__ -D__GO32__ -D__DJGPP__=2 -D__unix__ -D_
_MSDOS__ -D__GO32__ -D__DJGPP__=2 -D__unix__ -Asystem=msdos -Asystem=unix -D
__NO_INLINE__ -D__STDC_HOSTED__=1 -Acpu=i386 -Amachine=i386 -Di386 -D__i386 
-D__i386__ -D__tune_i586__ -D__tune_pentium__ -DMSDOS -DGO32 -DDJGPP=2 -Duni
x
MAIN.C -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=10
0 -quiet -dumpbase MAIN.C -version -o c:/djgpp/tmp\cce6WKb6.s
GNU CPP version 3.0.4 (cpplib) (80386, BSD syntax)
GNU C++ version 3.0.4 (djgpp)
 compiled by GNU C version 3.0.4.
ignoring nonexistent directory "c:/djgpp/djgpp/include"
#include "..." search starts here:
#include <...> search starts here:
 c:/djgpp/lang/cxx-v3
 c:/djgpp/lang/cxx-v3/djgpp
 c:/djgpp/lang/cxx-v3/backward
 c:/djgpp/lib/gcc-lib/djgpp/3.04/include
 c:/djgpp/include
End of search list.
MAIN.C:6: syntax error before `(' token
MAIN.C:6: parse error before `&' token
MAIN.C:7: ISO C++ forbids declaration of `to_string' with no type
MAIN.C: In function `int to_string(...)':
MAIN.C:8: `ostringstream' undeclared (first use this function)
MAIN.C:8: (Each undeclared identifier is reported only once for each
function
   it appears in.)
MAIN.C:8: parse error before `;' token
MAIN.C:9: `osstr' undeclared (first use this function)
MAIN.C:9: `val_i' undeclared (first use this function)
MAIN.C: In function `int main()':
MAIN.C:15: `cout' undeclared (first use this function)
MAIN.C:15: `endl' undeclared (first use this function)
|====== Compilation : END ========


--
====================
  Alex Vinokur
    http://up.to/alexvn
    http://go.to/alexv_math
    mailto:alexvn AT bigfoot DOT com
    mailto:alexvn AT go DOT to
  ====================