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From: "markmigm at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/106825] header unit <memory> based std::shared_ptr<...>(...) use gets: undefined reference to `std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release()', aarch64 example Date: Sun, 04 Sep 2022 17:14:21 +0000 [thread overview] Message-ID: <bug-106825-4-swO3t5Tb1C@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-106825-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106825 --- Comment #2 from Mark Millard <markmigm at gmail dot com> --- An tiny example that avoids all involvement of libstdc++ is (showing g++12 from FreeBSD in the comments, instead of c++ for fedora --but both contexts fail): # more module_template_specialization_failure.cppm // g++12 -std=c++20 -pedantic -Wall -Wextra -fmodules-ts -xc++-system-header memory // g++12 -std=c++20 -fmodules-ts -g -fPIC -xc++ -c module_template_specialization_failure.cppm export module module_template_specialization_intf; export template<int c> int test(); export template<> int test<0>() { return -1; }; export template<> int test<1>() { return -2; }; # more module_template_specialization_failure.cpp // g++12 -std=c++20 -pedantic -Wall -Wextra -fmodules-ts -xc++-system-header memory // g++12 -std=c++20 -pedantic -Wall -Wextra -fmodules-ts -fPIC -c -xc++ module_template_specialization_failure.cppm // g++12 -std=c++20 -pedantic -Wall -Wextra -fmodules-ts -fPIC -omain_using_plugin module_template_specialization_failure.cpp import module_template_specialization_intf; int main() { return test<0>()-test<1>(); } The sequence and result is: # c++ -std=c++20 -pedantic -Wall -Wextra -fmodules-ts -xc++-system-header memory # c++ -std=c++20 -pedantic -Wall -Wextra -fmodules-ts -fPIC -c -xc++ module_template_specialization_failure.cppm # c++ -std=c++20 -pedantic -Wall -Wextra -fmodules-ts -fPIC -omain_using_plugin module_template_specialization_failure.cpp /usr/bin/ld: /tmp/ccmyKNjk.o: in function `main': module_template_specialization_failure.cpp:(.text+0xc): undefined reference to `_ZW35module_template_specialization_intf4testILi0EEiv' /usr/bin/ld: module_template_specialization_failure.cpp:(.text+0x14): undefined reference to `_ZW35module_template_specialization_intf4testILi1EEiv' /usr/bin/ld: /tmp/ccmyKNjk.o: in function `_GLOBAL__sub_I_module_template_specialization_failure.cpp': module_template_specialization_failure.cpp:(.text+0x30): undefined reference to `_ZGIW35module_template_specialization_intf' collect2: error: ld returned 1 exit status
next prev parent reply other threads:[~2022-09-04 17:14 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-09-04 7:20 [Bug c++/106825] New: " markmigm at gmail dot com 2022-09-04 16:38 ` [Bug c++/106825] " markmigm at gmail dot com 2022-09-04 17:14 ` markmigm at gmail dot com [this message] 2022-09-04 17:43 ` markmigm at gmail dot com 2022-09-04 18:41 ` markmigm at gmail dot com 2022-10-12 19:13 ` [Bug c++/106825] [modules] " ppalka at gcc dot gnu.org
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