Re: c/4372: #pragma weak pthread* inclusion causes applications to crash without a linker error when one forgets to link with -lpthread

[Carlo Wood <carlo@alinoe.com>]

The following reply was made to PR c/4372; it has been noted by GNATS.

From: Carlo Wood <carlo@alinoe.com>
To: bangerth@dealii.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
  nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: c/4372: #pragma weak pthread* inclusion causes applications to crash without a linker error when one forgets to link with -lpthread
Date: Wed, 15 Jan 2003 01:23:32 +0100

 On Tue, Jan 14, 2003 at 11:10:22PM -0000, bangerth@dealii.org wrote:
 > Synopsis: #pragma weak pthread* inclusion causes applications to crash without a linker error when one forgets to link with -lpthread
 > 
 > State-Changed-From-To: feedback->closed
 > State-Changed-By: bangerth
 > State-Changed-When: Tue Jan 14 15:10:22 2003
 > State-Changed-Why:
 >     No feedback (at least not in audit trail)
 > 
 > http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4372
 
 Well, open it again because yes - this problem still exists with 3.2.1.
 
 >g++ test.cc -o test
 >./test
 Segmentation fault
 
 and
 
 >g++ test.cc -o test -lpthread
 >./test
 >
 
 I don't understand why you needed to feedback though.
 The small test case is simple enough, no?
 
 Still,
 
 >cat test.cc
 #include <iosfwd>
 #include <pthread.h>
 
 static pthread_once_t S_key_once;
 static pthread_key_t S_key;
 
 void S_destroy(void* tsd_ptr) throw()
 {
 }
 
 void S_alloc_key(void) throw()
 {
   pthread_key_create(&S_key, S_destroy);
 }
 
 int main(void)
 {
   pthread_once(&S_key_once, S_alloc_key);
 }
 
 
 -- 
 Carlo Wood <carlo@alinoe.com>