Re: libstdcxx hangs

On Wednesday 29 August 2007, Adriaan de Groot wrote:
> I've got something weird going on which I haven't figured out: programs
> using libstdcxx (and std::cout in particular) hang. If _REENTRANT is
> defined,

I switched to running this on nv_64 on an amd64 box (last week's spare -- this 
reminds me to keep the Solaris drive around) and find the same behavior, to 
some extent. Consider the following program:

# include <iostream>

int main(int argc, char **argv)
{
  if (argc!=2)
        std::cout << argc << std::endl;
  else
        std::cout << argv[1] << std::endl;
  return 0;
}


Compiling this with

CC -library=no%Cstd
	-I/opt/kdesupport/include 
	-L/opt/kdesupport/lib 
	-R/opt/kdesupport/lib 
	-D_REENTRANT -lstdcxx -lCrun t.cc

gives me a program that I can run with

./a.out foo

(prints foo, exits) or with

./a.out

(prints 1, hangs).

(gdb) bt
#0  0xbff28274 in __1cE__rwL__rw_localeN_C_is_managed6kMi_b_ ()
   from /opt/kdesupport/lib/libstdcxx.so
#1  0xbff29b3d in __1cDstdGlocale2T6M_v_ ()
   from /opt/kdesupport/lib/libstdcxx.so
#2  0x08051d92 in __1cDstdJbasic_ios4Ccn0ALchar_traits4Cc___Fwiden6kMc_c_ ()
#3  0x08051bf1 in 
__1cDstdEendl4Ccn0ALchar_traits4Cc___6Frn0ANbasic_ostream3CTACTB___4_ ()
#4  0x08051ab3 in main ()


so there is something delectable going on in the locales stuff. I'm going to 
soldier on and start work on a Makefile.kdesupport in CVSDude so people can 
start building that, too (aside from the people who already have it up and 
running, natch).


-- 
These are your friends - Adem
    GPG: FEA2 A3FE Adriaan de Groot

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