build errors with current libretro_super bsnes_hd rules

[cprivitere]

Opened this over here as well (libretro/libretro-super#1146) but thinking it belongs here more after talking to @byuu and @Screwtapello. Trying to compile the libretro_bsnes core via the libretro_bsnes_hd rules in libretro_super and I get the following:
cprivite@Mac-mini libretro-super % ./libretro-build-ios-arm64.sh bsnes_hd uname: illegal option -- o usage: uname [-amnprsv] CC = cc -arch arm64 -marm -miphoneos-version-min=8.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk CXX = c++ -arch arm64 -marm -miphoneos-version-min=8.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk CXX11 = clang++ -std=c++11 -stdlib=libc++ -arch arm64 -marm -miphoneos-version-min=8.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk CXX17 = clang++ -std=c++17 -stdlib=libc++ -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk STRIP = Compiler: CC="cc -arch arm64 -marm -miphoneos-version-min=8.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk" CXX="c++ -arch arm64 -marm -miphoneos-version-min=8.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk" === iOS == ios-arm64 ios-arm64 === bsnes HD Building bsnes_hd... cd "/Volumes/Storage/RetroArch/libretro-super/libretro-bsnes_hd/bsnes" make -f GNUmakefile platform="ios-arm64" -j7 compiler="clang++ -std=c++17 -stdlib=libc++ -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk" target="libretro" clean make: 'clean' is up to date. make -f GNUmakefile platform="ios-arm64" -j7 CC="cc -arch arm64 -marm -miphoneos-version-min=8.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk" CXX="c++ -arch arm64 -marm -miphoneos-version-min=8.0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk" compiler="clang++ -std=c++17 -stdlib=libc++ -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.1.sdk" target="libretro" Compiling target-libretro/libretro.cpp ... Compiling ../libco/libco.c ... Compiling emulator/emulator.cpp ... Compiling filter/filter.cpp ... Compiling lzma/lzma.cpp ... Compiling sfc/interface/interface.cpp ... Compiling sfc/system/system.cpp ... Compiling sfc/controller/controller.cpp ... clangclang: error: the clang compiler does not support '-march=native'clang: error: the clang compiler does not support '-march=native'clangclangclang: clang: : errorerror: : errorthe clang compiler does not support '-march=native': the clang compiler does not support '-march=native': errorerror: : the clang compiler does not support '-march=native'the clang compiler does not support '-march=native': the clang compiler does not support '-march=native' clang: error: unsupported option '-fopenmp' clang: errorclang: error: unsupported option '-fopenmp' clang: error: unsupported option '-fopenmp' clang: error: unsupported option '-fopenmp' clang: error: unsupported option '-fopenmp' clang: error: unsupported option '-fopenmp' : unsupported option '-fopenmp' make: *** [obj/sfc-system.o] Error 1 make: *** Waiting for unfinished jobs.... make: *** [obj/lzma.o] Error 1 make: *** [obj/libco.o] Error 1 make: *** [obj/libretro.o] Error 1 make: *** [obj/filter.o] Error 1 make: *** [obj/sfc-interface.o] Error 1 make: *** [obj/emulator.o] Error 1 cp "out/bsnes_hd_libretro_ios.dylib" "/Volumes/Storage/RetroArch/libretro-super/dist/ios-arm64/bsnes_hd_libretro_ios.dylib" cp: out/bsnes_hd_libretro_ios.dylib: No such file or directory 1 core(s) failed: bsnes_hd

Environment is macOS 10.15, Xcode 11.1.
Xcode-select -p is "/Applications/Xcode.app/Contents/Developer"

[CatGreen90]

The buildbot also fails to build bsnes on any Apple platform, with the error error: invalid value 'c++17' in '-std=c++17'

[cprivitere]

Interesting, I had no problems getting it to compile on my mac (10.15 with Xcode 11.1) once I stripped out all the references to march=native and -fopenmp from the makefiles. What is the buildbot running on?

[CatGreen90]

The Mac buildbot runs on a VM running Xcode 7.3, which can't be upgraded. C++17 support wasn't added until Xcode 9.3.

[cprivitere]

Ok, so "can't" is a bit of a non starter. Where does one go for conversations about that build vm, cause shackling the build around old hardware and OS's isn't in the best interests of getting performant emulation.

[CatGreen90]

The programming channel on the RA Discord would probably be your best bet.