https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251112
Bug ID: 251112
Summary: Compiling C++ with asan fails by default because
libclang_rt.asan-x86_64.so uses symbol
pthread_attr_get_np but doesn't link to libpthread.so
Product: Base System
Version: 12.2-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Compiler error:
...
/usr/bin/c++ -g -fno-omit-frame-pointer -shared-libasan
-fsanitize=address,undefined -fsanitize-recover=vptr -O2 -g -DNDEBUG -flto=thin
c/tests/CMakeFiles/test_main.dir/test_main.cpp.o
c/tests/CMakeFiles/c-proactor-test.dir/pn_test.cpp.o
c/tests/CMakeFiles/c-proactor-test.dir/pn_test_proactor.cpp.o
c/tests/CMakeFiles/c-proactor-test.dir/proactor_test.cpp.o -o
c/tests/c-proactor-test -Wl,-rpath,/home/vagrant/qpid-proton/BLD/c
c/libqpid-proton-proactor.so.1.7.1 c/libqpid-proton-core.so.10.11.0 && :
ld: error: /usr/lib/clang/10.0.1/lib/freebsd/libclang_rt.asan-x86_64.so:
undefined reference to pthread_attr_get_np
And indeed the library only links in portable pthreads via libc:
$ ldd /usr/lib/clang/10.0.1/lib/freebsd/libclang_rt.asan-x86_64.so
/usr/lib/clang/10.0.1/lib/freebsd/libclang_rt.asan-x86_64.so:
libc++.so.1 => /usr/lib/libc++.so.1 (0x800675000)
libcxxrt.so.1 => /lib/libcxxrt.so.1 (0x800742000)
libm.so.5 => /lib/libm.so.5 (0x800764000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x800796000)
libc.so.7 => /lib/libc.so.7 (0x80024e000)
Whereas the needed symbol is in libpthreads:
$ objdump -T /usr/lib/libpthread.so | grep pthread_attr_get_np
000000000001b960 w DF .text 0000000000000264 FBSD_1.0
pthread_attr_get_np
000000000001b960 w DF .text 0000000000000264 FBSDprivate_1.0
_pthread_attr_get_np
You can work around this by manually linking -lpthreads, but our build files
which work elsewhere don't do this as it's not necessary elsewhere.
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