Thanks Jeff for your help! So, are the errors confined to these files? Or could it be anywhere?
Comparing stages 2 and 3 warning: gcc/cc1obj-checksum.o differs warning: gcc/cc1-checksum.o differs warning: gcc/cc1plus-checksum.o differs Bootstrap comparison failure! gcc/i386-common.o differs gcc/bitmap.o differs libiberty/timeval-utils.o differs libiberty/pic/timeval-utils.o differs Is there anything else I can do to pin-point the problem? (like maybe gdb a certain file or pass a certain flag to get some debug info) Thanks, Balaji V. Iyer. -----Original Message----- From: Jeff Law [mailto:l...@redhat.com] Sent: Friday, November 04, 2011 2:41 PM To: Iyer, Balaji V Cc: 'gcc@gcc.gnu.org' Subject: Re: Bootstrap Failure Question -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/04/11 12:34, Iyer, Balaji V wrote: > Hello Everyone, I am getting a bootstrap failure right now when I try > to build GCC. Here is the output. Can someone please tell me how to > fix this? Is this something I have modified? I just configured using > the following command (../gcc/configure -prefix=<INSTALL_DIR>). I > haven't modified any of the .o files mentioned in the error. Typically a comparison failure means GCC has mis-compiled itself. You have to figure out why. I typically start with a small test which is compiled differently by the stage1 and stage2 compilers. Then I figure out where they diverge in their behavior (say at a pass level). Then I figure out where they first diverge at a function within a pass. That's usually the function that is being mis-compiled. Sometimes you can make some educated guesses based recent changes and comparing how something was compiled before/after the change. In all these are some of the most annoying bugs to tackle. jeff > > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJOtDHBAAoJEBRtltQi2kC7L20H/1SCJSyusm+MG3oL3SIS2AWz ahbGFPnIQO0jPi7KGGuH0Cb1ynk1yvHlyLGOoLMAxvRU4zzoKVpXfg7PD966C8Ad m7Lak7kTlyX6i+rB4+CIAsAA24u0Q1vzvnyzW4gEYk7v1dvvee1nqEMR5p/DbfUU iXei/L+tZJ4Vq5lf/+0B8Zz7+P10KmU1VydAlFS9OeK2QKuESXUADUiVZtrWZXsB ClzXOqm6F9Zq/HpK/Va5SGeiYy3sXGzFIzYUnV/RlZcExWH7kPTgbkLXky/D4lKS CyTzXsfo5mvqZuIp7HtOXGrSZPl2/w2Y1KF0LlQntkJKVR81sic/KG2CfeAVGPA= =5ZYe -----END PGP SIGNATURE-----
