Big Sur build fails in access.c

[ATL-Flaneur (Andreas Yankopolus)]

Building the base system from scratch after an update to Big Sur fails with:

fatal error: too many errors emitted, stopping now [-ferror-limit=]

I'm using Xcode 12.1, Build version 12A7403. Running software update indicates that everything is up to date.

The errors all pop up in access.c:

Users/ayank/MacPorts-2.6.3/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 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h:55:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_types.h:27:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:32:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/cdefs.h:807:2: error: 
      Unsupported architecture
#error Unsupported architecture
 ^
In file included from access.c:36:
In file included from ./darwintrace.h:40:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h:55:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_types.h:27:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:33:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/machine/_types.h:34:2: error: 
      architecture not supported
#error architecture not supported
 ^
In file included from access.c:36:
In file included from ./darwintrace.h:40:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h:55:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_types.h:27:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:55:9: error: 
      unknown type name '__int64_t'
typedef __int64_t       __darwin_blkcnt_t;      /* total blocks */
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:56:9: error: 
      unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_blksize_t;     /* preferred block size */
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:57:9: error: 
      unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_dev_t;         /* dev_t */
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:60:9: error: 
      unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_gid_t;         /* [???] process and gro...
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:61:9: error: 
      unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_id_t;          /* [XSI] pid_t, uid_t, o...
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:62:9: error: 
      unknown type name '__uint64_t'
typedef __uint64_t      __darwin_ino64_t;       /* [???] Used for 64 bi...
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:68:9: error: 
      unknown type name '__darwin_natural_t'
typedef __darwin_natural_t __darwin_mach_port_name_t; /* Used by mach */
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:70:9: error: 
      unknown type name '__uint16_t'; did you mean '__uint128_t'?
typedef __uint16_t      __darwin_mode_t;        /* [???] Some file attributes */
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:71:9: error: 
      unknown type name '__int64_t'
typedef __int64_t       __darwin_off_t;         /* [???] Used for file sizes */
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:72:9: error: 
      unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_pid_t;         /* [???] process and gro...
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:73:9: error: 
      unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_sigset_t;      /* [???] signal set */
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:74:9: error: 
      unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_suseconds_t;   /* [???] microseconds */
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:75:9: error: 
      unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_uid_t;         /* [???] user IDs */
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types.h:76:9: error: 
      unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_useconds_t;    /* [???] microseconds */
        ^
note: '__uint128_t' declared here
In file included from access.c:36:
In file included from ./darwintrace.h:40:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h:55:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_types.h:43:9: error: 
      unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_wctype_t;
        ^
note: '__uint128_t' declared here
In file included from access.c:36:
In file included from ./darwintrace.h:40:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h:60:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/time.h:69:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types/_clock_t.h:30:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/machine/types.h:37:2: error: 
      architecture not supported
#error architecture not supported
 ^
In file included from access.c:36:
In file included from ./darwintrace.h:40:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h:60:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/time.h:69:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/_types/_clock_t.h:31:9: error: 
      unknown type name '__darwin_clock_t'
typedef __darwin_clock_t        clock_t;
        ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make[2]: *** [access.o] Error 1
make[1]: *** [all] Error 1
make: *** [all] Error 1

[ATL-Flaneur (Andreas Yankopolus)]

Oddly, ​https://developer.apple.com/download/ shows an Xcode 12.3 beta but no Xcode 12.2 🤔

[ryandesign (Ryan Carsten Schmidt)]

Xcode 12.1 is not compatible with macOS 11 Big Sur. You need Xcode 12.2 or later.

Xcode 12.2 is available at ​https://developer.apple.com/download/more/?=Xcode%2012.2

[ATL-Flaneur (Andreas Yankopolus)]

Thanks for the download link. Installing Xcode 12.2 grabbing latest on the release-2.6 branch got me a clean build.