Since clang 16 (and gcc 11) the default C++ standard is now gnu++17.
Because multimedia/smpeg's configure scripts and Makefiles do not
explicitly set the C++ standard, this leads to several errors:
In file included from MPEGaudio.cpp:24:
../MPEGaudio.h:129:7: error: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
register int r=(buffer[bitindex>>3]>>(7-(bitindex&7)))&1;
^~~~~~~~~
../MPEGaudio.h:135:7: error: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
register unsigned short a;
^~~~~~~~~
MPEGaudio.cpp:317:3: error: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
register int r=(_buffer[bitindex>>3]>>(7-(bitindex&7)))&1;
^~~~~~~~~
MPEGaudio.cpp:326:3: error: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
register unsigned short a;
^~~~~~~~~
MPEGaudio.cpp:339:3: error: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
register unsigned short a;
^~~~~~~~~
Because smpeg uses a rather strange configure script, it does not
process CXXFLAGS correctly, so set CXX to include -std=gnu++98.
Also remove the REAL_CC patch which is no longer necessary.
PR: 271353
Approved by: portmgr (build fix blanket)
MFH: 2023Q2
967c8049e1