https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94156
Павел Тюнин <pavel51tunin at gmail dot com> changed:
What |Removed |Added
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CC| |pavel51tunin at gmail dot com
--- Comment #2 from Павел Тюнин <pavel51tunin at gmail dot com> ---
Created attachment 49391
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49391&action=edit
minimal sample to reproduce the bug
This sample triggers this or similar bug on both mingw 9.2.0 and mingw-w64
10.2.1. Compilation log:
D:\test>g++ -O2 -flto -c test1.cpp
D:\test>g++ -O2 -flto -c test2.cpp
D:\test>g++ -flto -o test.exe test1.o test2.o
D:/mingw-w64/mingw/bin/../lib/gcc/i686-w64-mingw32/10.2.1/../../../../i686-w64-m
ingw32/bin/ld.exe: test2.o (symbol from
plugin):(.gnu.linkonce.t._ZN7Derived3foo
Ev[__ZThn4_N7Derived3fooEv]+0x0): multiple definition of `Derived::foo()';
test1
.o (symbol from
plugin):(.gnu.linkonce.t._ZN7Derived3fooEv[__ZThn8_N7Derived3foo
Ev]+0x0): first defined here
D:/mingw-w64/mingw/bin/../lib/gcc/i686-w64-mingw32/10.2.1/../../../../i686-w64-m
ingw32/bin/ld.exe: test2.o (symbol from
plugin):(.gnu.linkonce.t._ZN7Derived3foo
Ev[__ZThn4_N7Derived3fooEv]+0x0): multiple definition of `non-virtual thunk to
D
erived::foo()'; test1.o (symbol from
plugin):(.gnu.linkonce.t._ZN7Derived3fooEv[
__ZThn8_N7Derived3fooEv]+0x0): first defined here
D:/mingw-w64/mingw/bin/../lib/gcc/i686-w64-mingw32/10.2.1/../../../../i686-w64-m
ingw32/bin/ld.exe: test2.o (symbol from
plugin):(.gnu.linkonce.t._ZN7Derived3foo
Ev[__ZThn4_N7Derived3fooEv]+0x0): multiple definition of `non-virtual thunk to
D
erived::foo()'; test1.o (symbol from
plugin):(.gnu.linkonce.t._ZN7Derived3fooEv[
__ZThn8_N7Derived3fooEv]+0x0): first defined here
collect2.exe: error: ld returned 1 exit status
