Re: Using SCLs to build a C++ library for EL 7?
On Mon, Apr 29, 2019 at 05:11:53PM +0200, Dan Čermák wrote:
John Reiser <jreiser(a)bitwagon.com> writes:
[..]
> What is the nature of the incompatibilities, and what are
specific
> examples?
We switched to from the POSIX regex library to <regex> as it should be
provided by a C++11 compatible compiler. Unfortunately gcc 4.8.5 does
not properly implement <regex> and it made a lot of tests fail. We have
therefore switched to using the SCL gcc & clang compiler for now.
Yes, at least GCC 4.8/4.9 (with the then current libstdc++)
featured a severely broken <regex> (e.g. also on Fedora 19).
If it's just <regex> an alternative is to fallback to Boost regex
- e.g. like this:
#ifdef SOME_MACRO_THAT_SIGNALS_PROPER_REGEX_AVAILABILITY
#include <regex>
namespace re = std;
#else
#include <boost/regex.hpp>
namespace re = boost;
#endif
And then use re::regex re::regex_match etc. in your code.
Best regards
Georg
--
'Embrace change' (Barack Ob^W^WKent Beck)