https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86215
simon at pushface dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #1 from simon at pushface dot org ---
Related to PR80556.
Building this with GCC 8.1.0 on Darwin 17.7.0 results in
lockheed:86215 simon$ g++ demo.cc -static-libgcc -static-libstdc++
ld: warning: direct access in function 'operator new(unsigned long,
std::nothrow_t
const&) [clone .cold.0]' from file
'/opt/gcc-8.1.0/bin/../lib/gcc/x86_64-apple-darwin15/8.1.0/../../../libstdc++.a(new_opnt.o)'
to global weak symbol 'operator new(unsigned long, std::nothrow_t const&)'
from file
'/opt/gcc-8.1.0/bin/../lib/gcc/x86_64-apple-darwin15/8.1.0/../../../libstdc++.a(new_opnt.o)'
means the weak symbol cannot be overridden at runtime.
This was likely caused by different translation units being compiled with
different visibility settings.
and running it works OK.
lockheed:86215 simon$ ./a.out
abc123
This GCC 8.1.0 was
Configured with: ../gcc-8.1.0/configure
--prefix=/Volumes/Miscellaneous/tmp/opt/gcc-8.1.0
--without-libiconv-prefix
--disable-libmudflap
--disable-libstdcxx-pch
--disable-libsanitizer
--disable-libcc1
--disable-libcilkrts
--disable-multilib
--disable-nls
--enable-languages=c,c++,ada,fortran,objc,obj-c++
--host=x86_64-apple-darwin15
--target=x86_64-apple-darwin15
--build=x86_64-apple-darwin15
--with-boot-ldflags='-static-libstdc++ -static-libgcc
-Wl,-headerpad_max_install_names'
The reason for explicitly setting the boot-ldflags was because of the need to
also specify the headerpad-max option.
