[buildroot 0001256]: build fails for buildroot selected for i386/i386 pthread.c compile error

[bugs at busybox.net]

A NOTE has been added to this issue. 
====================================================================== 
http://busybox.net/bugs/view.php?id=1256 
====================================================================== 
Reported By:                douglas_goodall
Assigned To:                uClibc
====================================================================== 
Project:                    buildroot
Issue ID:                   1256
Category:                   Architecture Specific
Reproducibility:            have not tried
Severity:                   block
Priority:                   normal
Status:                     assigned
====================================================================== 
Date Submitted:             03-03-2007 21:05 PST
Last Modified:              03-08-2007 02:22 PST
====================================================================== 
Summary:                    build fails for buildroot selected for i386/i386
pthread.c compile error
Description: 
  CC libpthread/linuxthreads.old/pthread.oS
  STRIP -x -R .note -R .comment
libpthread/linuxthreads.old/libpthread_so.a
  AR cr libpthread/linuxthreads.old/libpthread_so.a
  LD libpthread-0.9.29.so
libpthread/linuxthreads.old/libpthread_so.a(pthread.oS): In function
`__pthread_initialize_minimal':
pthread.c:(.text+0x13f): undefined reference to `_errno'
pthread.c:(.text+0x148): undefined reference to `_h_errno'
make[1]: *** [lib/libpthread.so] Error 1
make[1]: Leaving directory
`/home/doug/buildroot/toolchain_build_i386/uClibc'
make: *** [/home/doug/buildroot/toolchain_build_i386/uClibc/lib/libc.a]
Error 2
doug at ubuntu-i386:~/buildroot$


====================================================================== 

---------------------------------------------------------------------- 
 bernhardf - 03-07-07 09:23  
---------------------------------------------------------------------- 
not a buildroot issue but a uclibc one. Assigning accordingly 

---------------------------------------------------------------------- 
 ynglingatal - 03-08-07 02:22  
---------------------------------------------------------------------- 
I had the same error yesterday with the snapshot of uClibc and gcc 4.1.1 as
well
as 3.3.5 from buildroot. When changing to uClibc 0.9.28.1 the problem
naturally
disappears. The problem seems to be that the uClibc-snapshot has two
unconditional

"extern int _errno; extern int _h_errno;"

in       libpthread/linuxthreads/pthread.c

whereas uClibc 0.9.28.1 uses these under conditional compilation. Since
these
two variables were never declared properly, without 'extern', in another
source file, the error arose. 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
03-03-07 21:05  douglas_goodallNew Issue                                    
03-03-07 21:05  douglas_goodallStatus                   new => assigned     
03-03-07 21:05  douglas_goodallAssigned To               => buildroot       
03-07-07 09:23  bernhardf      Note Added: 0002215                          
03-07-07 09:23  bernhardf      Assigned To              buildroot => uClibc 
03-08-07 02:22  ynglingatal    Note Added: 0002221                          
======================================================================