Date: Sat, 13 Jun 2026 17:08:08 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 296041] libc++: __locale fails to compile due to missing isascii declaration on FreeBSD 15.0 Message-ID: <bug-296041-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296041 Bug ID: 296041 Summary: libc++: __locale fails to compile due to missing isascii declaration on FreeBSD 15.0 Product: Base System Version: 15.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: info@babaei.net I am trying to build the latest Protobuf v35.1 on FreeBSD (v34.2 builds fine), but it seems the new release triggers a bug inside libc++ internal headers: FAILED: [code=1] CMakeFiles/libprotobuf.dir/Release/src/google/protobuf/io/zero_copy_stream_impl.cc.o /usr/bin/c++ -DGOOGLE_PROTOBUF_CMAKE_BUILD -DGOOGLE_PROTOBUF_NO_RTTI=1 -DHAVE_ZLIB -DCMAKE_INTDIR=\"Release\" -I/tmp/WickHopper-XXXXXX.KaVLQW729E/build -I/home/mamadou/WickHopper/third-party/protobuf -I/tmp/WickHopper-XXXXXX.KaVLQW729E/build/src -I/home/mamadou/WickHopper/third-party/protobuf/src -I/home/mamadou/WickHopper/third-party/protobuf/third_party/utf8_range -isystem /tmp/WickHopper-XXXXXX.KaVLQW729E/zlib-stage/include -isystem /tmp/WickHopper-XXXXXX.KaVLQW729E/abseil-stage/include -O3 -DNDEBUG -fvisibility=hidden -fvisibility-inlines-hidden -MD -MT CMakeFiles/libprotobuf.dir/Release/src/google/protobuf/io/zero_copy_stream_impl.cc.o -MF CMakeFiles/libprotobuf.dir/Release/src/google/protobuf/io/zero_copy_stream_impl.cc.o.d -o CMakeFiles/libprotobuf.dir/Release/src/google/protobuf/io/zero_copy_stream_impl.cc.o -c /home/mamadou/WickHopper/third-party/protobuf/src/google/protobuf/io/zero_copy_stream_impl.cc In file included from /home/mamadou/WickHopper/third-party/protobuf/src/google/protobuf/io/zero_copy_stream_impl.cc:24: In file included from /usr/include/c++/v1/istream:164: In file included from /usr/include/c++/v1/__ostream/basic_ostream.h:24: In file included from /usr/include/c++/v1/ios:220: /usr/include/c++/v1/__locale:530:12: error: use of undeclared identifier 'isascii' 530 | return isascii(__c) ? (__tab_[static_cast<int>(__c)] & __m) != 0 : false; | ^ I've already reported it to Protobufs's developers here https://github.com/protocolbuffers/protobuf/issues/27942 but it seems this is not a bug in Protobuf. Rather a libc++ internal header or GNU extensions compatibility issue, where that header is trying to use a GNU extension, which will break when compiled with Clang enforcing that the GNU extensions are not available. I'm not sure whether this is the right place to report the issue or it's best to report to LLVM libc++ team. But, checking the libc++ version on FreeBSD: mamadou@freebsd-dev:~ $ cat p.cpp #include <iostream> #include <__config> int main() { #ifdef _LIBCPP_VERSION std::cout << "_LIBCPP_VERSION = " << _LIBCPP_VERSION << '\n'; #else std::cout << "_LIBCPP_VERSION not defined\n"; #endif } mamadou@freebsd-dev:~ $ clang++ -o p p.cpp mamadou@freebsd-dev:~ $ ./p _LIBCPP_VERSION = 190107 mamadou@freebsd-dev:~ $ It seems libc++ on the latest FreeBSD 15-RELEASE is not the latest version. I am not sure if I can, or if I can how to install a newer libc++ on FreeBSD to see if I can reproduce before reporting to the LLVM team. More info about this issue can be found here: https://github.com/protocolbuffers/protobuf/issues/27942 -- You are receiving this mail because: You are the assignee for the bug.home | help
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