Build issue utilizing Boost::regex

From: Brad Smith (brad_at_[hidden])
Date: 2021-05-28 16:41:00

Hi,

I am trying to upgrade from Boost 1.73 to Boost 1.76 and down to only 
one consumer left that will
not build. This appears to be an issue with Boost::regex.

I noticed this in the Boost 1.76 release notes..

"Regex is now header only except in C++03 mode."

Clang defaults to C++14, but I noticed BOOST_REGEX_CXX03 is defined. The 
project does not
specify a particular C++ version so it should be using C++14.

The functions below exist in the Boost 1.73 Boost::regex library but not 
in the 1.76
library.

The project in question uses the function regex_match().

Any hints as to how to resolve this?

ld: error: undefined symbol: 
boost::scoped_static_mutex_lock::scoped_static_mutex_lock(boost::static_mutex&, 
bool)
 >>> referenced by Config.cpp
 >>>Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
Config.o:(boost::object_cache<boost::re_detail_500::cpp_regex_traits_base<char>, 
boost::re_detail_500::cpp_regex_traits_implementation<char> 
 >::get(boost::re_detail_500::cpp_regex_traits_base<char> const&, 
unsigned long))
 >>> referenced by Config.cpp
 >>>Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
Config.o:(boost::cpp_regex_traits<char>::get_catalog_name())
 >>> referenced by Config.cpp
 >>>Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
Config.o:(boost::re_detail_500::save_state_init::~save_state_init())
 >>> referenced 2 more times

ld: error: undefined symbol: 
boost::scoped_static_mutex_lock::~scoped_static_mutex_lock()
 >>> referenced by Config.cpp
 >>>Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
Config.o:(boost::object_cache<boost::re_detail_500::cpp_regex_traits_base<char>, 
boost::re_detail_500::cpp_regex_traits_implementation<char> 
 >::get(boost::re_detail_500::cpp_regex_traits_base<char> const&, 
unsigned long))
 >>> referenced by Config.cpp
 >>>Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
Config.o:(boost::object_cache<boost::re_detail_500::cpp_regex_traits_base<char>, 
boost::re_detail_500::cpp_regex_traits_implementation<char> 
 >::get(boost::re_detail_500::cpp_regex_traits_base<char> const&, 
unsigned long))
 >>> referenced by Config.cpp
 >>>Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
Config.o:(boost::cpp_regex_traits<char>::get_catalog_name())
 >>> referenced 5 more times
c++: error: linker command failed with exit code 1 (use -v to see 
invocation)