I went ahead and did some checking on the compiler warnings that binutils produces. There are 27 warnings that come from binutils-2.19.51 (we already use --disable-werror in the book). There are 30 warnings that come from binutils-2.20.
The three additional warnings that are produced are as follows: syslex.c:1271: warning: 'yyunput' defined but not used arlex.c:1396: warning: 'yyunput' defined but not used ldlex.c:3362: warning: 'yyunput' defined but not used yyunput is not defined by any code added by the pax patch. In fact none of the warnings in either build are a result of the pax patch. When compiling without the patch the warnings are exactly the same. As such I don't see much reason for holding back on binutils-2.20. RBaker On Fri, May 14, 2010 at 6:16 PM, Robert Connolly <rob...@linuxfromscratch.org> wrote: > Hi. > > The PaX team doesn't have a patch for binutils-2.20, only for 2.19. The 2.19 > patch has several compiler warnings when applied to binutils-2.20. PLD and > Gentoo use --disable-werror when building Binutils, use the old patch with > binutils-2.20, and ignore the compiler warnings. > > The only feature in 2.20 that caught my attention was the Gold linker. Gold > was developed to perform better than the old BFD linker. The programs that > Gold links will perform the same. In gcc-4.5 there are link time > optimizations (-flto) with Gold linker plugin support (-fuse-linker-plugin). > The -fuse-linker-plugin option is used to extract objects files from static > libraries, instead of doing this by hand, for better optimization > from -flto. -flto alone doesn't optimize very well, and should be used > with -fwhole-program. Not many packages support building with these options, > so they will be rarely used for the moment. > > So, for me personally, there isn't a great deal of reason to upgrade to > binutils-2.20, at least until PaX releases a new Binutils patch. > > Something you might want to discuss or think about. > robert > > > -- > http://linuxfromscratch.org/mailman/listinfo/hlfs-dev > FAQ: http://www.linuxfromscratch.org/faq/ > Unsubscribe: See the above information page > > -- http://linuxfromscratch.org/mailman/listinfo/hlfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
