[MacPorts] #74344: PyQt5: cannot compile on qt58 due to several reasons

[MacPorts]

#74344: PyQt5: cannot compile on qt58 due to several reasons
-----------------------+--------------------
 Reporter:  nilFinx    |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:  mavericks  |       Port:  py-qt5
-----------------------+--------------------
 Tested with py314-qt5

 1. -Wno-enum-constexpr-conversion is missing, and -Wenum-constexpr-
 conversion works like -Werror somehow.
 Fix: Add -Wno-enum-constexpr-conversion to CXXFLAGS in .qmake.cache in
 source directory after configure.
 2. Link issue on macOS 13.3 SDK
 {{{
 :info:build
 /Applications/Develop/Xcode6.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
 -headerpad_max_install_names -stdlib=libc++ -arch x86_64
 -Wl,-headerpad_max_install_names -L/opt/local/lib -lMacportsLegacySupport
 -Wl,-syslibroot,/Applications/Develop/Xcode6.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk
 -mmacosx-version-min=10.9  -o QtCore.app/Contents/MacOS/QtCore
 cfgtest_QtCore.o   -F/opt/local/libexec/qt5/lib -framework QtCore
 -framework DiskArbitration -framework IOKit
 :info:build clang: warning: argument unused during compilation:
 '-stdlib=libc++' [-Wunused-command-line-argument]
 :info:build ld: unexpected token: !tapi-tbd file
 '/Applications/Develop/Xcode6.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk/System/Library/Frameworks//IOKit.framework/IOKit.tbd'
 for architecture x86_64
 :info:build clang: error: linker command failed with exit code 1 (use -v
 to see invocation)
 }}}
 Fix: Avoid having macOS 13.3 SDK. I added it temporarily to compile
 something else but looks like it is attacking me here.
 3. Link issue, missing symbols
 {{{
 :info:build Undefined symbols for architecture x86_64:
 :info:build   "operator delete(void*)", referenced from:
 :info:build       _main in cfgtest_QtNetwork.o
 :info:build   "operator new(unsigned long)", referenced from:
 :info:build       _main in cfgtest_QtNetwork.o
 :info:build   "___gxx_personality_v0", referenced from:
 :info:build       _main in cfgtest_QtNetwork.o
 :info:build       Dwarf Exception Unwind Info (__eh_frame) in
 cfgtest_QtNetwork.o
 :info:build ld: symbol(s) not found for architecture x86_64
 }}}
 This is a fresh build, using 10.10 SDK.
 Fix: Append -stdlib=libc++ to LFLAGS in .qmake.cache, again, after
 configure.

 I think that's all the issues for now. 2, I think can be ignored as it's a
 very non-standard situation.

 TLDR: Modify CXX and L(D) flags, and do not have a very new SDK installed
 on old system.

-- 
Ticket URL: <https://trac.macports.org/ticket/74344>
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