https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83838
--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
[...]
>> > Does Solaris ld support comdat?
>>
>> ... like this one: complete Solaris ld support for comdat started
>> sometime in the Solaris 11 timeframe, cf. configure.ac (comdat_group).
>> Solaris 10 did not (at least not in a way that could cope with
>> everything gcc might generate).
>
> G++ uses comdat extensively. Without comdat, g++ generates very
> odd codes. Please double check if libstdc++ object files on Solaris
> have any comdat sections.
It's exactly as I said:
sol10 $ readelf -g i386-pc-solaris2.10/libstdc++-v3/src/.libs/libstdc++.a
File: i386-pc-solaris2.10/libstdc++-v3/src/.libs/libstdc++.a(compatibility.o)
There are no section groups in this file.
[... and so on for every object]
sol11 $ elfdump -g i386-pc-solaris2.11/libstdc++-v3/src/.libs/libstdc++.a
i386-pc-solaris2.11/libstdc++-v3/src/.libs/libstdc++.a(compatibility.o):
Group Section: .group%DW.ref._ZTIN10__cxxabiv115__forced_unwindE
Signature Symbol: DW.ref._ZTIN10__cxxabiv115__forced_unwindE
Members:
index flags / section
[0] [ COMDAT ]
[1]
.data.DW.ref._ZTIN10__cxxabiv115__forced_unwindE%DW.ref._ZTIN10__cxxabiv115__forced_unwindE
[2]
.rel.data.DW.ref._ZTIN10__cxxabiv115__forced_unwindE%DW.ref._ZTIN10__cxxabiv115__forced_unwindE
[...]
Even without comdat support, C++ testresults on Solaris 10 are as good
as on Solaris 11.
Rainer
