xercesc3 does not build when using c++11

[gallafent]

Using the configure line:

sudo port install xercesc3 configure.cxx_stdlib=libc++ configure.cxxflags=-std=c++11 \
configure.macosx_deployment_target=10.7 \
configure.sdkroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk

… the build fails with the following error:

:info:build xercesc/util/regx/ParserForXMLSchema.cpp:159:42: error: non-constant-expression cannot be narrowed from type 'XMLInt32' (aka 'int') to 'XMLCh' (aka 'unsigned short') in initializer list [-Wc++11-narrowing]
:info:build         XMLCh chString[] = {chBackSlash, ch, chNull};        
:info:build                                          ^~
:info:build xercesc/util/regx/ParserForXMLSchema.cpp:159:42: note: override this message by inserting an explicit cast
:info:build         XMLCh chString[] = {chBackSlash, ch, chNull};        
:info:build                                          ^~
:info:build                                          static_cast<XMLCh>( )
:info:build 1 error generated.
:info:build make[4]: *** [xercesc/util/regx/ParserForXMLSchema.lo] Error 1

I assume the easy patch as suggested by clang will be appropriate.

[gallafent]

Applies the patches which I am about to attach

[gallafent]

Remove C++11 narrowing error

[gallafent]

Remove C++11 narrowing error

[gallafent]

Remove C++11 narrowing error

[gallafent]

Remove C++11 narrowing error

[gallafent]

Attached patches allow successful build with C++11.

[gallafent]

Note that this is also fixed upstream, and is scheduled for the Xerces-C++ 3.2.0 release. I couldn't find any information about when that release is expected to occur though, so it would seem prudent for us to patch here in the mean time.

​https://issues.apache.org/jira/browse/XERCESC-1995

[ryandesign (Ryan Carsten Schmidt)]

Replying to william@…:

Using the configure line:

sudo port install xercesc3 configure.cxx_stdlib=libc++ configure.cxxflags=-std=c++11 \
configure.macosx_deployment_target=10.7 \
configure.sdkroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk

… the build fails with the following error:

Why add all these flags? The port builds fine for me when I just run "sudo port install xercesc3".

[nerdling (Jeremy Lavergne)]

Using solely the configure.cxx* args, I'm able to build this without any errors on 10.13.

That is, simply sudo port install xercesc3 configure.cxx_stdlib=libc++ configure.cxxflags=-std=c++11 appears to work.

Are these patches still needed?

[scantor (Scott Cantor)]

It's very likely they were fixed as part of 3.2.0 or 3.2.1.