On 17.01.21 14:25, Martin Storsjö wrote:
Hi,
On Sun, 17 Jan 2021, Sandro Mani wrote:
I'm working on updating the mingw toolchain for Fedora, and am
building mingw-gcc-11 with mingw-crt-8.0.0. I'm stuck at this error
when linking libgcc [1]:
/usr/i686-w64-mingw32/bin/ld: _ctors_s.o:libgcc2.c:(.bss+0x0):
multiple definition of `__DTOR_LIST__';
/usr/i686-w64-mingw32/sys-root/mingw/lib/../lib/dllcrt2.o:crtdll.c:(.dtors+0x0):
first defined here
/usr/i686-w64-mingw32/bin/ld: _ctors_s.o:libgcc2.c:(.bss+0x8):
multiple definition of `__CTOR_LIST__';
/usr/i686-w64-mingw32/sys-root/mingw/lib/../lib/dllcrt2.o:crtdll.c:(.ctors+0x0):
first defined here
Indeed, I see
mingw-w64-crt/crt/crtdll.c:__attribute__ (( __section__ (".dtors"),
__used__ , aligned(sizeof(void *)))) const void * __DTOR_LIST__ =
(void *) -1;
mingw-w64-crt/crt/crtdll.c:__attribute__ (( __section__ (".ctors"),
__used__ , aligned(sizeof(void *)))) const void * __CTOR_LIST__ =
(void *) -1;
These are within an #ifndef HAVE_CTOR_LIST. During configure (of
mingw-w64-crt), there's an "checking whether the linker provides
__CTOR_LIST__... yes". If you're running into such an error, it sounds
to me like this test didn't produce the expected result in your case.
Can you have a look in the config.log why it didn't behave as expected?
Thanks for the pointer, indeed the I get "checking whether the linker
provides __CTOR_LIST__... no", reason being
configure:5889: checking whether the linker provides __CTOR_LIST__
configure:5940: i686-w64-mingw32-gcc conftest.c -fstack-protector -lssp
-nostdlib -o conftest
/usr/lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld:
cannot find -lssp
collect2: error: ld returned 1 exit status
Indeed, with the bootstrapping procedure for the new CRT I've used so
far (gcc-core -> crt -> gcc full (no libgomp) -> winpthreads -> gcc full
(with libgomp)), libssp is not built with the first gcc bootstrapping
stage (gcc-core). I guess I need to filter out -fstack-protector -lssp
from the LDFLAGS when building mingw-crt.
Thanks
Sandro
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