http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54120
--- Comment #5 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-22 23:00:21 UTC --- As might have been expected, libgfortran/random.o differs between revisions 189365 and 189366. Even in the .i files, there are many differences. For example, # diff -u random.i /test/gnu/gcc/objdir-189366/hppa2.0w-hp-hpux11.11/libgfortr> --- random.i Sat Dec 22 17:25:17 2012 +++ /test/gnu/gcc/objdir-189366/hppa2.0w-hp-hpux11.11/libgfortran/random.i Sat Dec 22 17:27:36 2012 @@ -8,26 +8,26 @@ # 1 "./config.h" 1 # 43 "../../../gcc/libgfortran/libgfortran.h" 2 -# 1 "/test/gnu/gcc/objdir/gcc/include-fixed/stdio.h" 1 3 4 -# 14 "/test/gnu/gcc/objdir/gcc/include-fixed/stdio.h" 3 4 -# 1 "/test/gnu/gcc/objdir/gcc/include/stdarg.h" 1 3 4 -# 41 "/test/gnu/gcc/objdir/gcc/include/stdarg.h" 3 4 +# 1 "/test/gnu/gcc/objdir/./gcc/include-fixed/stdio.h" 1 3 4 +# 14 "/test/gnu/gcc/objdir/./gcc/include-fixed/stdio.h" 3 4 +# 1 "/test/gnu/gcc/objdir/./gcc/include/stdarg.h" 1 3 4 +# 41 "/test/gnu/gcc/objdir/./gcc/include/stdarg.h" 3 4 There are also many differences in the .s files. I see this with bootstrap disabled.