Re: safer way to use gnulib ('C++' + 'gnulib' does not still work on MinGW )

[Tatsuro MATSUOKA]

Hello

The previous mail

http://www-old.cae.wisc.edu/pipermail/octave-maintainers/2010-March/015556.html
--- Tatsuro MATSUOKA  wrote:

::::::::::::::::::::::
> # if 1
> #  if 1
> //#   if !(defined __cplusplus && defined GNULIB_NAMESPACE)
> #    define nanosleep rpl_nanosleep
> //#   endif
> 
> If the comment out like above are carried out  for the declaration error from 
> the same origin,
> compile
> goes well.
:::::::::::::::::::::::


Perhaps the above situation comes from some miss setting of gnulib on octave.

I have personally made libgnu library for time and nanosleep modules from 
gnulib directory of octave.

cd /cygdrive/c/usr/tatsu/test/testgnu
/cygdrive/c/usr/tatsu/mingwhome/octaves/hg/octave-work/gnulib/gnulib-tool 
--create-testdir
--dir=/cygdrive/c/usr/tatsu/test/testgnu/time time nanosleep 
cd time
./configure
make
cd ..
rm *.o
g++ -c testcc.cc -I./time/gllib

// testcc.cc
#include <iostream>
int main(void)
{
        nanosleep();
        return 0;
}
//

Obviously  the above incorrect code, the error massages are 

$ g++ -c testcc.cc -I./time/gllib
In file included from ./time/gllib/wchar.h:64:0,
                 from 
c:\programs\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/cwchar:47,
                 from 
c:\programs\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/bits/postypes.h:42,
                 from 
c:\programs\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/iosfwd:42,
                 from 
c:\programs\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/ios:39,
                 from 
c:\programs\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/ostream:40,
                 from 
c:\programs\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/iostream:40,
                 from testcc.cc:1:
./time/gllib/time.h:374:1: error: expected ',' or '...' before '__timer'
./time/gllib/time.h:374:1: error: nonnull argument with out-of-range operand 
number (argument 1,
operand 2)
./time/gllib/time.h:389:1: error: expected ',' or '...' before '__timer'
./time/gllib/time.h:389:1: error: nonnull argument with out-of-range operand 
number (argument 1,
operand 2)
./time/gllib/time.h:410:1: error: expected ',' or '...' before '__buf'
./time/gllib/time.h:410:1: error: nonnull argument with out-of-range operand 
number (argument 1,
operand 2)
testcc.cc: In function 'int main()':
testcc.cc:4:12: error: too few arguments to function 'int rpl_nanosleep(const 
rpl_timespec*,
rpl_timespec*)'
./time/gllib/time.h:339:1: note: declared here

#*****************
The point I would like to say that
too few arguments to function 'int rpl_nanosleep(const rpl_timespec*, 
rpl_timespec*)'

symbol rpl_nanosleep recognized correctly. 

In time.h

There found
#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
  _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
    namespace GNULIB_NAMESPACE                                \
    {                                                         \
      rettype (*const func) parameters = ::rpl_func;          \
    }                                                         \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#else
# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

If the above is correctly , rpl_'ed functions can be called from C++ program.
However, the current situation in building octave on the MinGW are different 
from the simple test.

This is all that I can say at present.

Regards

Tatsuro 


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