[cfe-dev] Undefined reference for ___msan_init

[Peter Collingbourne]

Hi Jeffrey,

MSan is currently only supported on Linux/x86_64.

Peter

On Sun, Sep 15, 2013 at 07:16:07PM -0400, Jeffrey Walton wrote:
> Hi All,
> 
> I'm trying out MSan on Mac OS X with the Squid project. Asan found one
> issue with Squid, and I'm trying to get additional tools on it since
> its not quite clear what problem is being flagged by Asan.
> 
> Below are the link errors when attempting to build Squid with msan.
> 
> Would anyone happen to know the name of the library I should link against?
> 
> $ find /usr/local/ -iname msan
> $
> 
> Thanks in advance.
> 
> $ /usr/local/bin/clang++ -v
> clang version 3.3 (tags/RELEASE_33/final)
> Target: x86_64-apple-darwin12.5.0
> Thread model: posix
> $ uname -a
> Darwin riemann.home.pvt 12.5.0 Darwin Kernel Version 12.5.0: Mon Jul
> 29 16:33:49 PDT 2013; root:xnu-2050.48.11~1/RELEASE_X86_64 x86_64
> 
> libtool: link: /usr/local/bin/clang++ -fsanitize=memory
> -fsanitize=undefined -fno-sanitize=vptr -I/opt//local/include/cppunit
> -Werror -Qunused-arguments -D_REENTRANT -g -O2 -g -o basic_ldap_auth
> basic_ldap_auth.o -Wl,-bind_at_load
> ../../../lib/.libs/libmiscencoding.a
> -L/Users/jwalton/Desktop/squid-3.3.9/compat -lcompat-squid -lldap
> -llber
> Undefined symbols for architecture x86_64:
>   "___msan_init", referenced from:
>       anon in basic_ldap_auth.o
>       anon in libcompat-squid.a(debug.o)
>       anon in libmiscencoding.a(rfc1738.o)
>       anon in libcompat-squid.a(xstring.o)
>       anon in libcompat-squid.a(compat.o)
>       anon in libcompat-squid.a(xalloc.o)
>   "___msan_memcpy", referenced from:
>       _main in basic_ldap_auth.o
>       _xstrdup in libcompat-squid.a(xstring.o)
>   "___msan_param_tls", referenced from:
>       _main in basic_ldap_auth.o
>       open_ldap_connection(char const*, int) in basic_ldap_auth.o
>       _rfc1738_do_escape in libmiscencoding.a(rfc1738.o)
>       _rfc1738_unescape in libmiscencoding.a(rfc1738.o)
>       _fromhex in libmiscencoding.a(rfc1738.o)
>       _xstrdup in libcompat-squid.a(xstring.o)
>       _xstrncpy in libcompat-squid.a(xstring.o)
>       ...
>   "___msan_retval_tls", referenced from:
>       _main in basic_ldap_auth.o
>       open_ldap_connection(char const*, int) in basic_ldap_auth.o
>       _rfc1738_do_escape in libmiscencoding.a(rfc1738.o)
>       _rfc1738_unescape in libmiscencoding.a(rfc1738.o)
>       _fromhex in libmiscencoding.a(rfc1738.o)
>       _xstrdup in libcompat-squid.a(xstring.o)
>       _xstrncpy in libcompat-squid.a(xstring.o)
>       ...
>   "___msan_va_arg_overflow_size_tls", referenced from:
>       _main in basic_ldap_auth.o
>       open_ldap_connection(char const*, int) in basic_ldap_auth.o
>       _rfc1738_do_escape in libmiscencoding.a(rfc1738.o)
>       _xcalloc in libcompat-squid.a(xalloc.o)
>       _xmalloc in libcompat-squid.a(xalloc.o)
>       _xrealloc in libcompat-squid.a(xalloc.o)
>   "___msan_va_arg_tls", referenced from:
>       _main in basic_ldap_auth.o
>       open_ldap_connection(char const*, int) in basic_ldap_auth.o
>       _rfc1738_do_escape in libmiscencoding.a(rfc1738.o)
>       _xcalloc in libcompat-squid.a(xalloc.o)
>       _xmalloc in libcompat-squid.a(xalloc.o)
>       _xrealloc in libcompat-squid.a(xalloc.o)
>   "___msan_warning_noreturn", referenced from:
>       _main in basic_ldap_auth.o
>       open_ldap_connection(char const*, int) in basic_ldap_auth.o
>       _rfc1738_do_escape in libmiscencoding.a(rfc1738.o)
>       _rfc1738_unescape in libmiscencoding.a(rfc1738.o)
>       _fromhex in libmiscencoding.a(rfc1738.o)
>       _xstrdup in libcompat-squid.a(xstring.o)
>       _xstrncpy in libcompat-squid.a(xstring.o)
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> 

-- 
Peter