On 22/03/11 01:31, Matthias Klose wrote: > On 21.03.2011 13:19, Uros Bizjak wrote: >> On Sun, Mar 20, 2011 at 4:16 PM, Matthias Klose <d...@debian.org> wrote: >>> https://buildd.debian.org/status/package.php?p=gcc-4.6&suite=experimental >>> >>> Bootstrap comparison failure! >>> gcc/opts.o differs >>> make[4]: *** [compare] Error 1
I see gcc-4.6 still FTBFS on alpha with the boostrap comparison failure. > maybe alpha-no-ev4-directive.diff targeting to ev4 makes a difference? No, it's not that. Nor any of the other Debian patches. Interestingly it compiles with upstream sources (well, it fails at a later stage with a linker internal error but that's another story) if one just configures with ./configure. But if one uses the Debian options used to configure [1] then upstream source also has the bootstrap comparison failure. Comparing gcc/opts.o from stage 3 against stage 2 by the following: objdump -d ./stage2-gcc/opts.o > opts-2.txt objdump -d ./stage2-gcc/opts.o > opts-2.txt diff opts-2.txt opts-3.txt I get from the diff: 90c90 < 14c: 01 00 84 20 lda t3,1(t3) --- > 14c: 02 30 40 40 addl t1,0x1,t1 93c93 < 158: 02 30 40 40 addl t1,0x1,t1 --- > 158: 01 00 84 20 lda t3,1(t3) showing that two instructions have been swapped in order. Actually the order does not matter as we can see from opts-2.txt: 140: a5 05 eb 40 cmpeq t6,s2,t4 144: a3 07 03 41 cmpule t7,t2,t2 148: a5 15 a0 40 cmpeq t4,0,t4 14c: 01 00 84 20 lda t3,1(t3) 150: 03 00 a3 44 and t4,t2,t2 154: 1f 04 ff 5f fnop 158: 02 30 40 40 addl t1,0x1,t1 15c: 10 00 60 f4 bne t2,1a0 <wrap_help+0x1a0> The instructions at 14c and 158 have no data dependencies with each other or with instructions in between so can be safely swapped. Cheers Michael [1] ../src/configure -v --with-pkgversion='Debian 4.6.0-8' --with-bugurl='file:///usr/share/doc/gcc-4.6/README.Bugs' --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-multiarch --with-multiarch-defaults=alpha-linux-gnu --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --disable-libssp --enable-plugin --enable-objc-gc --with-long-double-128 --enable-checking=release --build=alpha-linux-gnu --host=alpha-linux-gnu --target=alpha-linux-gnu -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4de9b590.7070...@orcon.net.nz