From: pk@pk.invalid   
      
   jef wrote:   
      
   > Not too much hope to emerge anything . I thought portage was up to date,   
   > but "emerge -uDvNt world" gives :   
   > *****************************   
   >>>> Source unpacked.   
   >>>> Compiling source in /var/tmp/portage/sys-apps/portage-2.1.4.4/work/   
   > portage-2.1.4 ...   
   > In file included from tbz2tool.c:3:   
   > /usr/include/stdio.h:34:21: stddef.h: No such file or directory   
      
   Apparently, stddef.h belongs to linux-headers. So, try emerging   
   linux-headers (emerge linux-headers, should be an unpack-only merge; it   
   should not need to compile anything) and then try an emerge -uDvNt world   
   again.   
      
   > checking for forced unwind support... no   
   > configure: error: forced unwind support is required   
   >[cut]   
   > do you know what is "forced unwind support" and how to enable it ?   
      
   A bit of googling seems to suggest that's something related to libpthreads.   
   Just a shot in the dark: after emerging linux-headers, try emerging gcc   
   (before emerging world).   
      
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