[Bug 242266] CLang 6.0.1 (Part of the System 12.0) can not Build CLang 8.0.1 from the Port Collection

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242266

Dimitry Andric <dim at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dim at FreeBSD.org

--- Comment #3 from Dimitry Andric <dim at FreeBSD.org> ---
It looks like you are tickling some old bug in 6.0.1 which makes it use way too
much memory for this particular compile command.  I tried on 12.0-RELEASE amd64
with a lot of RAM, and I got the following time(1) output:

       84.83 real        31.36 user        53.31 sys
   6560428  maximum resident set size
     40472  average shared memory size
      2587  average unshared data size
       255  average unshared stack size
   3201539  page reclaims
      1370  page faults
         0  swaps
      1379  block input operations
         5  block output operations
         0  messages sent
         0  messages received
         0  signals received
      1383  voluntary context switches
      1152  involuntary context switches

E.g, it needs 6.3 GiB of memory and more than a minute to compile.  This is
obviously never going to work on i386, which can use up to 4 GiB of memory for
user processes.

Compare this to clang 8.0.1 on recent stable/12:

       23.17 real        18.12 user         3.36 sys
    314944  maximum resident set size
     42981  average shared memory size
       358  average unshared data size
       253  average unshared stack size
     69152  page reclaims
      1090  page faults
         0  swaps
      1100  block input operations
         5  block output operations
         3  messages sent
         0  messages received
         0  signals received
      1105  voluntary context switches
       346  involuntary context switches

That needs only ~308 MiB of memory, and a little more than 20 seconds.

I'm unsure what will help here. You could try leaving out the -march=native
stuff, or lowering the optimization level.  The former should be easy enough,
but for the latter, I don't know how to achieve that with the port.

Another alternative is to do a binary upgrade to 12.1-R, and work from there.

-- 
You are receiving this mail because:
You are the assignee for the bug.