Many warnings when compiling master with Clang

[Scott Kostyshak]

On Thu, Jan 03, 2019 at 11:55:43AM -0500, Scott Kostyshak wrote:
> On Thu, Jan 03, 2019 at 10:43:12AM +0100, Jean-Marc Lasgouttes wrote:
> > Le 02/01/2019 à 20:46, Scott Kostyshak a écrit :
> > > Thanks. Just checked and almost all of them are gone. I still get the
> > > following:
> > > 
> > > In file included from /home/scott/lyxbuilds/master_clang/repo/src/EnchantChecker.cpp:14:
> > > /usr/include/enchant/enchant++.h:55:25: error: 'enchant::Exception::what' hides overloaded virtual function [-Werror,-Woverloaded-virtual]
> > >                          virtual const char * what () throw() {
> > >                                               ^
> > > /usr/bin/../lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/bits/exception.h:69:5: note: hidden overloaded virtual function 'std::exception::what' declared here: different qualifiers (const vs none)
> > >      what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT;
> > >      ^
> > 
> > This is something that I reported upstream a long time ago and did not get
> > fixed in v1.x to avoid breaking ABI.
> 
> Good to know.
> 
> > It has however been fixed in 2.x versions, but this is not (yet?) packaged
> > for ubuntu.
> 
> Looks like not even for Ubuntu 18.10:
> 
>   https://packages.ubuntu.com/search?keywords=enchant

It is in Ubuntu 20.04 daily, and I'm happy that I can finally compile
LyX with -Werror and Clang. With Clang on one processor in a virtual box
I get 13 minutes, compared to 18 minutes with GCC.

Scott
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