py-argon2-cffi: ar: build/temp.macosx-10.13-x86_64-3.8/libargon2.a: Inappropriate file type or format

[ryandesign (Ryan Carsten Schmidt)]

py38-argon2-cffi fails to destroot with the universal variant:

building 'argon2' library
/usr/bin/clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch x86_64 -arch i386 -isysroot/ -msse2 -Iextras/libargon2/src/../include -Iextras/libargon2/src/blake2 -c extras/libargon2/src/argon2.c -o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/argon2.o
/usr/bin/clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch x86_64 -arch i386 -isysroot/ -msse2 -Iextras/libargon2/src/../include -Iextras/libargon2/src/blake2 -c extras/libargon2/src/blake2/blake2b.c -o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/blake2/blake2b.o
/usr/bin/clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch x86_64 -arch i386 -isysroot/ -msse2 -Iextras/libargon2/src/../include -Iextras/libargon2/src/blake2 -c extras/libargon2/src/core.c -o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/core.o
/usr/bin/clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch x86_64 -arch i386 -isysroot/ -msse2 -Iextras/libargon2/src/../include -Iextras/libargon2/src/blake2 -c extras/libargon2/src/encoding.c -o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/encoding.o
/usr/bin/clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch x86_64 -arch i386 -isysroot/ -msse2 -Iextras/libargon2/src/../include -Iextras/libargon2/src/blake2 -c extras/libargon2/src/opt.c -o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/opt.o
/usr/bin/clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch x86_64 -arch i386 -isysroot/ -msse2 -Iextras/libargon2/src/../include -Iextras/libargon2/src/blake2 -c extras/libargon2/src/thread.c -o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/thread.o
ar rcs build/temp.macosx-10.13-x86_64-3.8/libargon2.a build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/argon2.o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/blake2/blake2b.o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/core.o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/encoding.o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/opt.o build/temp.macosx-10.13-x86_64-3.8/extras/libargon2/src/thread.o
ar: build/temp.macosx-10.13-x86_64-3.8/libargon2.a is a fat file (use libtool(1) or lipo(1) and ar(1) on it)
ar: build/temp.macosx-10.13-x86_64-3.8/libargon2.a: Inappropriate file type or format
error: command 'ar' failed with exit status 1

Using the muniversal portgroup could be one way to work around this problem. Another would be to modify the build process to "use libtool(1) or lipo(1) and ar(1) on" the library.

(Not sure why any compilation is occurring in the destroot phase...)