Configured and built with: ../gcc-4.2-20070221/configure --enable-languages=c --enable-bootstrap --disable-nls && make BOOT_CFLAGS="-gstabs"
The result is: [...] Comparing stages 2 and 3 warning: ./cc1-checksum.o differs Bootstrap comparison failure! ./dbxout.o differs ./insn-emit.o differs ./varasm.o differs [...] I recompiled these sources with stage 2 and stage 3 compilers into assembly, for dbxout.c I got the following: --- dbxout-stage2.s 2007-03-16 21:27:01.000000000 +0100 +++ dbxout-stage3.s 2007-03-16 21:29:42.000000000 +0100 @@ -14245,12 +14245,12 @@ leave ret .size dbxout_block, .-dbxout_block - .stabs "begin_label:(0,39)=ar(5,28);0;19;(0,2)",128,0,0,-52 + .stabs "begin_label:(0,30)",128,0,0,-52 .stabn 192,0,0,.LFBB69-.LFBB69 .stabs "did_output:(0,1)",128,0,0,-32 .stabs "blocknum:(0,1)",128,0,0,-28 .stabn 192,0,0,.LBB180-.LFBB69 - .stabs "buf:(0,39)",128,0,0,-72 + .stabs "buf:(0,30)",128,0,0,-72 .stabs "scope_start:(10,36)",128,0,0,-24 .stabn 192,0,0,.LBB181-.LFBB69 .stabs "decl:(47,10)",128,0,0,-20 The other files differ in the same manner. It's very similar to http://gcc.gnu.org/ml/gcc/2001-09/msg00882.html. -- Summary: Bootstrap comparison failure with -gstabs Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: feri1024 at t-email dot hu GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31235