Ubuntu
gcc-mingw-w64 package

gcc-mingw-w64 no symbols in libgcov.a

Bug #1883933 reported by Jan Wielemaker
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
gcc-mingw-w64 (Ubuntu)
Fix Released
Undecided
Stephen Kitt

Bug Description

In Ubuntu 20.04, libgcov.a for MinGW is almost empty:

```
nm -gC /usr/lib/gcc/x86_64-w64-mingw32/9.3-win32/libgcov.a | grep __gcov_one_value_profiler
nm: _gcov_merge_ior.o: no symbols
nm: _gcov_merge_time_profile.o: no symbols
nm: _gcov_merge_icall_topn.o: no symbols
nm: _gcov_interval_profiler.o: no symbols
nm: _gcov_interval_profiler_atomic.o: no symbols
```

This breaks profile guided optimization. These symbols are present in Ubuntu 18.04 (MinGW-gcc 7.3).

Stephen Kitt (steve-sk2)
Changed in gcc-mingw-w64 (Ubuntu):
assignee: nobody → Stephen Kitt (steve-sk2)
status: New → Confirmed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package gcc-mingw-w64 - 24.2

---------------
gcc-mingw-w64 (24.2) unstable; urgency=medium

  * Fix gcov handling: we need to tell GCC that we have headers, without
    telling it where, and then we need to correct its default assumption
    about where they are. Closes: #989862. LP: #1883933, #1920988.

 -- Stephen Kitt <email address hidden> Sat, 12 Jun 2021 18:54:10 +0200

Changed in gcc-mingw-w64 (Ubuntu):
status: Confirmed → Fix Released
Revision history for this message
Jan Wielemaker (j-wielemaker) wrote :

Thanks!

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