I am getting build errors when I build MacPorts on my iMac running the latest Big Sur beta. Yeah I know, it's beta, but I think my question is still relevant. Please see below for the full error message (first error of many). Thanks for any help!
clang -MM -MP -DHAVE_CONFIG_H -I/Users/rcook/current_projects/macports-base/src -I/Users/rcook/current_projects/macports-base/src -I. -I/Users/rcook/current_projects/macports-base/vendor/vendor-destroot/opt/local/libexec/macports/include -I./../compat access.c > access.d
clang -g -O2 -std=c99 -Wextra -Wall -fPIC -arch arm64 -arch x86_64 -DHAVE_CONFIG_H -I/Users/rcook/current_projects/macports-base/src -I/Users/rcook/current_projects/macports-base/src -I. -I/Users/rcook/current_projects/macports-base/vendor/vendor-destroot/opt/local/libexec/macports/include -I./../compat -c -o access.o access.c
In file included from access.c:36:
In file included from ./darwintrace.h:40:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/pthread.h:55:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/_types.h:27:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/_types.h:32:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/cdefs.h:807:2: error: Unsupported architecture
#error Unsupported architecture