kdevplatform @4.7.4: error: expected expression

[fpiraneo (Francesco Piraneo G.)]

On MacOS High Sierra building kdevelop, building stops with the underlined error. Logfile attached.

[fpiraneo (Francesco Piraneo G.)]

Port build log

[ryandesign (Ryan Carsten Schmidt)]

:info:build [ 53%] Building CXX object interfaces/CMakeFiles/kdevplatforminterfaces.dir/iuicontroller.cpp.o
:info:build cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/build/interfaces && /usr/bin/c++  -DKDE4_CMAKE_TOPLEVEL_DIR_LENGTH=147 -DKDE_DEFAULT_DEBUG_AREA=9502 -DKDE_DEPRECATED_WARNINGS -DMAKE_KDEVPLATFORMINTERFACES_LIB -DQT_NO_CAST_TO_ASCII -DQT_NO_STL -DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS -DQURL_NO_CAST_FROM_QSTRING -D_REENTRANT -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/build/interfaces -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/interfaces -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/build -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/util -I/opt/local/include/KDE4 -I/opt/local/include/KDE4/KDE -I/opt/local/include/KDE -I/opt/local/include -I/opt/local/libexec/qt4/include/QtXmlPatterns -I/opt/local/libexec/qt4/include/QtXml -I/opt/local/libexec/qt4/include/QtWebKit -I/opt/local/libexec/qt4/include/QtUiTools -I/opt/local/libexec/qt4/include/QtTest -I/opt/local/libexec/qt4/include/QtSvg -I/opt/local/libexec/qt4/include/QtSql -I/opt/local/libexec/qt4/include/QtScriptTools -I/opt/local/libexec/qt4/include/QtScript -I/opt/local/libexec/qt4/include/QtOpenGL -I/opt/local/libexec/qt4/include/QtNetwork -I/opt/local/libexec/qt4/include/QtMultimedia -I/opt/local/libexec/qt4/include/QtHelp -I/opt/local/libexec/qt4/include/QtDesigner -I/opt/local/libexec/qt4/include/QtDeclarative -I/opt/local/libexec/qt4/include/QtDBus -I/opt/local/libexec/qt4/include/Qt3Support -I/opt/local/libexec/qt4/include/QtGui -I/opt/local/libexec/qt4/include/QtCore -I/opt/local/libexec/qt4/include -I/opt/local/libexec/qt4/share/mkspecs/default  -pipe -Os -fno-common -DNDEBUG -DQT_NO_DEBUG -arch x86_64 -mmacosx-version-min=10.13 -fPIC   -D__APPLE_KDE__  -o CMakeFiles/kdevplatforminterfaces.dir/iuicontroller.cpp.o -c /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/interfaces/iuicontroller.cpp
:info:build In file included from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/interfaces/iplugin.cpp:40:
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/interfaces/iplugincontroller.h:126:108: error: expected expression
:info:build     Q_SCRIPTABLE virtual IPlugin *pluginForExtension(const QString &extension, const QString& pluginName = {}, const QVariantMap& constraints = {} ) = 0;
:info:build                                                                                                            ^
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/interfaces/iplugincontroller.h:126:145: error: expected expression
:info:build     Q_SCRIPTABLE virtual IPlugin *pluginForExtension(const QString &extension, const QString& pluginName = {}, const QVariantMap& constraints = {} ) = 0;
:info:build                                                                                                                                                 ^
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/interfaces/iplugincontroller.h:137:111: error: expected expression
:info:build     virtual QList<IPlugin*> allPluginsForExtension(const QString &extension, const QVariantMap& constraints = {}) = 0;
:info:build                                                                                                               ^
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/interfaces/iplugincontroller.h:174:112: error: expected expression
:info:build     virtual KPluginInfo::List queryExtensionPlugins(const QString &extension, const QVariantMap& constraints = {}) const = 0;
:info:build                                                                                                                ^
:info:build 2 warnings generated.
:info:build [ 53%] Building CXX object sublime/CMakeFiles/sublime.dir/mainwindow_p.cpp.o
:info:build cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/build/sublime && /usr/bin/c++  -DKDE4_CMAKE_TOPLEVEL_DIR_LENGTH=147 -DKDE_DEFAULT_DEBUG_AREA=9504 -DKDE_DEPRECATED_WARNINGS -DMAKE_SUBLIME_LIB -DQT_NO_CAST_TO_ASCII -DQT_NO_STL -DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS -DQURL_NO_CAST_FROM_QSTRING -D_REENTRANT -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/build/sublime -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/sublime -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/build -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/util -I/opt/local/include/KDE4 -I/opt/local/include/KDE4/KDE -I/opt/local/include/KDE -I/opt/local/include -I/opt/local/libexec/qt4/include/QtXmlPatterns -I/opt/local/libexec/qt4/include/QtXml -I/opt/local/libexec/qt4/include/QtWebKit -I/opt/local/libexec/qt4/include/QtUiTools -I/opt/local/libexec/qt4/include/QtTest -I/opt/local/libexec/qt4/include/QtSvg -I/opt/local/libexec/qt4/include/QtSql -I/opt/local/libexec/qt4/include/QtScriptTools -I/opt/local/libexec/qt4/include/QtScript -I/opt/local/libexec/qt4/include/QtOpenGL -I/opt/local/libexec/qt4/include/QtNetwork -I/opt/local/libexec/qt4/include/QtMultimedia -I/opt/local/libexec/qt4/include/QtHelp -I/opt/local/libexec/qt4/include/QtDesigner -I/opt/local/libexec/qt4/include/QtDeclarative -I/opt/local/libexec/qt4/include/QtDBus -I/opt/local/libexec/qt4/include/Qt3Support -I/opt/local/libexec/qt4/include/QtGui -I/opt/local/libexec/qt4/include/QtCore -I/opt/local/libexec/qt4/include -I/opt/local/libexec/qt4/share/mkspecs/default  -pipe -Os -fno-common -DNDEBUG -DQT_NO_DEBUG -arch x86_64 -mmacosx-version-min=10.13 -fPIC   -D__APPLE_KDE__  -o CMakeFiles/sublime.dir/mainwindow_p.cpp.o -c /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/kdevplatform-1.7.4/sublime/mainwindow_p.cpp
:info:build 4 errors generated.
:info:build make[2]: *** [interfaces/CMakeFiles/kdevplatforminterfaces.dir/iplugin.cpp.o] Error 1
:info:build make[2]: *** Waiting for unfinished jobs....

[NicosPavlov]

I am afraid I can't reproduce that error, but from the log, it seems that you are employing a non-compliant compiler:

:warn:configure All compilers are either blacklisted or unavailable; defaulting to first fallback option
:debug:configure Environment: 
:debug:configure CC='/usr/bin/cc'
:debug:configure CC_PRINT_OPTIONS='YES'
:debug:configure CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_kde_kdevplatform/kdevplatform/work/.CC_PRINT_OPTIONS'
:debug:configure CFLAGS='-pipe -Os'
:debug:configure CPATH='/opt/local/include'
:debug:configure CXX='/usr/bin/c++'

As kdevelop requires c++11, I assume clang or at least a compiler compatible with libc++ should be employed. The errors in the log point to the same problem.

[fpiraneo (Francesco Piraneo G.)]

Replying to NicosPavlov:

I am afraid I can't reproduce that error, but from the log, it seems that you are employing a non-compliant compiler: (cut) As kdevelop requires c++11, I assume clang or at least a compiler compatible with libc++ should be employed. The errors in the log point to the same problem.

Yeah, clang! Exactly what I'm using... All Apple original branded compiler! Beware of imitations!

~ >clang --version
Apple LLVM version 9.0.0 (clang-900.0.39.2)
Target: x86_64-apple-darwin17.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

What else?

[kencu (Ken)]

This Portfile will need to be adjusted somewhat. This part:

#Using c++11 for Lion and higher in case of clang 64-bit
if {${configure.compiler} eq "clang" && ${os.platform} eq "darwin" && ${os.major} >= 11} {
    lappend merger_configure_args(x86_64)   -DCMAKE_CXX_FLAGS='-stdlib=libc++ -std=c++11' -DHAVE_UNORDERED_MAP=1
    if {${build_arch} eq "x86_64" && ![variant_isset universal]} {
        configure.args-append               -DCMAKE_CXX_FLAGS="-stdlib=libc++ -std=c++11" -DHAVE_UNORDERED_MAP=1
    }
}

would not work correctly with the cxx11 1.1 PortGroup, as it is forcing stdlib=libc++ rather than allowing that PG to function as designed.

That doesn't explain the OP's error, though.

[NicosPavlov]

Fair point, I'll fix that. This part is mostly historical, before the cxx11 1.1 PG was included in the Portfile.

[ryandesign (Ryan Carsten Schmidt)]

Now that MacPorts 2.6.0 is out, both the cxx11 1.1 portgroup and other OS version specific hacks that related to the C++ standard lib should be removed in favor of:

compiler.cxx_standard 2011

But if the project does not already include -std=c++11 in its CXXFLAGS, the port still needs to do so manually.

[ryandesign (Ryan Carsten Schmidt)]

Please make sure you make the needed changes in all affected ports; I see at least kdevplatform and kdevelop use this code.

[NicosPavlov]

Thanks for the pointer. Only kdevplatform and kdevelop should be in that situation, they caused different issues to build them. I'll perform the changes, sorry for leaving that ticket hanging.

[Nicolas Pavillon <pavillon.nicolas@…>]

In 8516e6e601c76c57bb26de1224077ed40f74682b/macports-ports (master):

kdevplatform, kdevelop: use new flag to use c++11 (fixes #55781)