Bug 216021

Summary:	lang/gcc* all symbols for libgcov.a should likely be exposed
Product:	Ports & Packages	Reporter:	Enji Cooper <ngie>
Component:	Individual Port(s)	Assignee:	Andreas Tobler <andreast>
Status:	Closed Not Enough Information
Severity:	Affects Some People	CC:	bdrewery, dim, emaste, gerald, markj
Priority:	---
Version:	Latest
Hardware:	Any
OS:	Any

Description Enji Cooper freebsd_committer

2017-01-13 10:39:16 UTC

For reasons similar to what I explained in https://reviews.freebsd.org/D9168 (which includes a repro), more of the gcov symbols should be exposed in order for --coverage to "just work" with gcc like suggested in the toolchain manpage. Otherwise I have to explicitly use -lgcov when linking binaries, which is broken per the docs... From man 1 gcc:

       --coverage
           This option is used to compile and link code instrumented for
           coverage analysis.  The option is a synonym for -fprofile-arcs
           -ftest-coverage (when compiling) and -lgcov (when linking).  See
           the documentation for those options for more details.

/usr/local/bin/ld: foo.full: hidden symbol `__gcov_merge_add' in /usr/local/lib/gcc49/gcc/x86_64-portbld-freebsd12.0/4.9.4/libgcov.a(_gcov_merge_add.o) is referenced by DSO
/usr/local/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
*** Error code 1

Comment 1 Gerald Pfeifer freebsd_committer

2017-01-13 18:16:37 UTC

Andreas, is this something you can help with (upstream first, probably,
and then we'll see)?

Comment 2 Enji Cooper freebsd_committer

2017-01-13 23:54:54 UTC

(In reply to Gerald Pfeifer from comment #1)

Thank you for driving this. I'd really like to add --coverage support and lcov coverage gathering to FreeBSD for $work.

Comment 3 Andreas Tobler freebsd_committer

2017-01-14 15:23:33 UTC

Can you help me bit?

I get this:

[m91p:~] andreast% gcc49 -o hashtest --coverage hashtest.c
[m91p:~] andreast% nm hashtest | grep gcov_merge
0000000000402080 T __gcov_merge_add

No errors.

Comment 4 Gerald Pfeifer freebsd_committer

2021-11-06 09:55:32 UTC

(In reply to Andreas Tobler from comment #3)
> Can you help me bit?
>
> I get this:
>
> [m91p:~] andreast% gcc49 -o hashtest --coverage hashtest.c
> [m91p:~] andreast% nm hashtest | grep gcov_merge
> 0000000000402080 T __gcov_merge_add
>
> No errors.

Enji, perhaps you missed this, or your priorities changed?

Since this has been open for nearly five years now I'm closing it.