On Sun, May 2, 2010 at 11:38 PM, Gerald Pfeifer <ger...@pfeifer.com> wrote: > As http://gcc.gnu.org/ml/gcc-testresults/2010-05/msg00120.html shows, > *-unknown-freebsd* exhibits tons of failures around LTO. > > I dug a bit deeper, and even the most trivial test program > int main() { } > fails with > lto1: internal compiler error: compressed stream: data error > Please submit a full bug report, > with preprocessed source if appropriate. > See <http://gcc.gnu.org/bugs.html> for instructions. > lto-wrapper: /files/pfeifer/gcc/bin/gcc returned 1 exit status > collect2: lto-wrapper returned 1 exit status > when compiled with gcc -flto x.c. > > The backtrace looks as follows, not too helpful: > > #0 diagnostic_action_after_output () at /usr/test/gcc/gcc/diagnostic.c:193 > #1 0x08136d6e in diagnostic_report_diagnostic (context=0x8926400, > diagnostic=0xbfbfe5f4) at /usr/test/gcc/gcc/diagnostic.c:472 > #2 0x0813754a in internal_error (gmsgid=0x87928df "compressed stream: %s") > at /usr/test/gcc/gcc/diagnostic.c:757 > #3 0x0827117e in lto_end_uncompression (stream=0x28b03b80) > at /usr/test/gcc/gcc/lto-compress.c:309 > Backtrace stopped: previous frame inner to this frame (corrupt stack?) > (gdb) > > Now, gcc/doc/install.texi requests libelf version 0.8.12 which is not > present on this system. Rather, from what I can see FreeBSD has its > own, independent implementation. And something seems to be broken or > missing or incompatible here. > > I can see three outcomes here, addressing this issue (which happens on > a default installation). > > 1. Tighten the GCC configure checks so that they detect that (if) > the FreeBSD provided libelf is not sufficient and bail out. > 2. Fix GCC to work with the FreeBSD provided libelf. > 3. Fix FreeBSD to sufficiently support GCC (Joseph and Kai on Cc: are > the respective maintainers there). > > How can we best get this resolved?
I think Steve Kargl had the same problem and it is indeed the FreeBSD libelf that seems to be broken. I'd tighten the libelf check but have no idea how to detect the broken libelf. Richard. > Gerald >
