evince: error: expected ';' at end of declaration list

[joshupetersen (Joshua Petersen)]

When running

sudo port install gnome

gets the error:

Error: Failed to build evince: command execution failed.

Looking in main.log for evince, I found the following:

....
/opt/local/include/unicode/localpointer.h:71:51: warning: deleted function definitions are a C++11 extension [-Wc++11-extension]
/opt/local/include/unicode/localpointer.h:72:53: warning: deleted function definitions are a C++11 extension [-Wc++11-extension]
/opt/local/include/unicode/localpointer.h:74:58:  warning: deleted function definitions are a C++11 extension [-Wc++11-extension]
/opt/local/include/unicode/localpointer.h:224:34:  warning: rvalue references are a C++11 extension [-Wc++11-extension]
/opt/local/include/unicode/localpointer.h:224:40: error: expected ';' at end of declaration list
/opt/local/include/unicode/localpointer.h:405:30: warning: rvalue references are a C++11 extension [-Wc++11-extension]
/opt/local/include/unicode/localpointer.h:405:36: error: expected ';' at end of declaration list
....
(More errors came later of a similar nature)

[joshupetersen (Joshua Petersen)]

I've seen a similar ticket (NOT A DUPLICATE) for another port, specifically qscintilla, but it looks like it could have a very similar solution:

#53625

[mf2k (Frank Schima)]

Please attach the main.log.

[ryandesign (Ryan Carsten Schmidt)]

#53625 is a years-old ticket. But what has happened recently is that icu (which is the port that installed the file /opt/local/include/unicode/localpointer.h) was updated to a new version that requires C++11. Because of this, many ports that require icu now have to require C++11 as well. evince doesn't use icu (at least, it doesn't declare a dependency on it), but it does use libxml2, which uses icu, and that may be enough to impose the C++11 requirement on evince. We have seen such problems with other ports since the icu update.

[Zippyzip]

Same problem here. It seems that this problem is popping up all over the place with other ports. Any short-time fix while waiting for the updated port?

[kencu (Ken)]

an easy thing to try is to build it with a compiler that defaults to >= -std=c++11, eg:

sudo port -v install clang-9.0
sudo port -v install evince configure.compiler=macports-clang-9.0

[Zippyzip]

Replying to kencu:

an easy thing to try is to build it with a compiler that defaults to >= -std=c++11, eg:

sudo port -v install clang-9.0
sudo port -v install evince configure.compiler=macports-clang-9.0

Thanks, that worked.

[jmroot (Joshua Root)]

In 134cb9c9d05ee6e044dc330204d9dc33ee495f73/macports-ports (master):

libxml2: update to 2.9.10

Also, don't expose the ICU C++ API via libxml/encoding.h if the C++
version is too old.

Fixes: #59499
Fixes: #59519
Fixes: #59565
Fixes: #59567
Fixes: #59645
Fixes: #59721
Fixes: #59736