Bug 690150 – dev-util/trace-cmd-2.8 Parallel building fails

• Status: RESOLVED OBSOLETE
• Product: Gentoo Linux

[Description Phil 2019-07-18 14:25:04 UTC]

Hi,

Emerging dev-util/trace-cmd-2.8 on a dual-core system with HT fails. MAKEOPTS set to '-j5', used gcc is 9.1.0-r1. Compilation aborts with file truncated messages, obviously an object file is used for linking while another instance writes to it:

/usr/lib/gcc/x86_64-pc-linux-gnu/9.1.0/../../../../x86_64-pc-linux-gnu/bin/ld: /var/tmp/portage/dev-util/trace-cmd-2.8/work/trace-cmd-v2.8/lib/traceevent/parse-filter.o: file not recognized: file truncated
collect2: error: ld returned 1 exit status

Downgrading to dev-util/trace-cmd-2.7-r2 succeeds without changes to the configuration. Emerging version 2.8 is possible after changing MAKEOPTS to '-j1'.

Cheers, Phil

[Comment 1 Phil 2019-07-18 14:27:20 UTC]

Created attachment 583392 [details]
/var/tmp/portage/dev-util/trace-cmd-2.8/temp/build.log

[Comment 2 Patrick McLean 2019-07-24 20:14:14 UTC]

Created attachment 584462 [details, diff]
trace-cmd-2.8.2-r1-split-build.patch

I am having trouble reproducing this on my workstation. Does this patch help?

[Comment 3 Phil 2019-07-25 08:32:35 UTC]

Hi Patrick,

(In reply to Patrick McLean from comment #2)
> Created attachment 584462 [details, diff] [details, diff]
> trace-cmd-2.8.2-r1-split-build.patch
> 
> I am having trouble reproducing this on my workstation. Does this patch help?

Sadly not, I'm still getting the "file truncated" error.

Here's a minimal reproducer:

CFLAGS="-pipe" make -j5 NO_UDIS86=1 VERBOSE=1 trace-cmd libs

Seems the combination of -pipe and specifying the inter-dependent targets 'trace-cmd' and 'libs' when calling make does the trick.

I'm not sure whether requesting to build trace-cmd and libs in parallel is a good idea: trace-cmd requires LIBTRACECMD_STATIC which causes make sub-process call in lib/trace-cmd to build libtracecmd.a. OTOH, libs requires LIBTRACECMD_SHARED which causes a similar make sub-process to build libtracecmd.so.

Meanwhile I'll remove -pipe from my CFLAGS - my /var/tmp/portage is a tmpfs with 17GB max size, so despite its questionable relevance in modern systems I'll probably not see any of the expected downsides when omitting it.

Cheers, Phil

[Comment 4 Toralf Förster 2022-12-10 11:44:55 UTC]

compile hangs for -j1 too

[Comment 5 Phil 2022-12-12 15:52:39 UTC]

Toralf, wrong bug? This is not about a hang, but parallel build failure.

[Comment 6 Yixun Lan 2023-01-04 04:30:11 UTC]

I can't reproduce this problem at 3.1.5, so will close as obsolete.

please try again, and re-open if you still have problem.