llvm-config uses incorrect SDK taken from xcode rather than command-line tools

[thomasrussellmurphy (Thomas Russell Murphy)]

Filing (late) a ticket per the request of the mailing list. Re-ran clean + upgrade attempt and attaching log.

Addendum: fixed for llvm-7.0. still an issue for llvm-5.0 and llvm-6.0.

[thomasrussellmurphy (Thomas Russell Murphy)]

cctools upgrade failure log

[kencu (Ken)]

presumably once we confirm all the buildbots have the command line tools installed, we revbump every port (like this one) with a baked-in SDK pointing into Xcode, and we should fix these issues up.

[EJFielding (Eric Fielding)]

I was going to open a new ticket but found this one with exactly the same problem. I am attaching my "main.log" file also in case it helps.

[EJFielding (Eric Fielding)]

main log showing failure to build

[EJFielding (Eric Fielding)]

I was trying to upgrade all my other ports and I tried this:

sudo port upgrade outdated and not cctools

The port command is still trying to build cctools. Is this the correct syntax?

[jrjsmrtn]

I added another log for a cctools 921_4 failed upgrade on macOS 10.14.6.

[EJFielding (Eric Fielding)]

I installed Xcode 10.3 (had to find it on the developer.apple.com site ​https://developer.apple.com/download/more/?=xcode). Now my cctools upgrade works.

[thomasrussellmurphy (Thomas Russell Murphy)]

Workaround to enable updating the rest of my ports tree:

sudo port uninstall -f cctools
sudo port install cctools +xcode

The problematic variant may still need to be corrected, but changing variants should meet my needs.

[EJFielding (Eric Fielding)]

In case someone else tries to follow what I did, installing an old version of Xcode only worked for a while. My employer has an automatic software upgrade system that installed Xcode 11.2 on top of Xcode 10.3. Apparently, it did not do a complete installation, so I then ended up with an inconsistent Swift library and xcodebuild would not run. I got a bunch of errors like this:

objc[48448]: Class __SwiftNativeNSDataBase is implemented in both /usr/lib/swift/libswiftCore.dylib (0x7fff94acce48) and /Applications/Xcode.app/Contents/Frameworks/libswiftCore.dylib (0x10633ded0). One of the two will be used. Which one is undefined.
objc[48448]: Class __SwiftNativeNSIndexSetBase is implemented in both /usr/lib/swift/libswiftCore.dylib (0x7fff94acce98) and /Applications/Xcode.app/Contents/Frameworks/libswiftCore.dylib (0x10633df20). One of the two will be used. Which one is undefined.
This copy of libswiftCore.dylib requires an OS version prior to 10.14.4.

It also seems like cctools is now fixed, so this issue can be closed.

[kencu (Ken)]

All of the following is on 10.14 as of Feb 9, 2020:

It looks like things are fixed in llvm 8, and 9, which now have much smaller cflags footprints:

$ llvm-config-mp-9.0 --cflags
-I/opt/local/libexec/llvm-9.0/include  -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS

$ llvm-config-mp-8.0 --cflags
-I/opt/local/libexec/llvm-8.0/include  -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS

llvm-7.0 has been rebuilt against the command line tools, and the isysroot cflags are correct now:

$ llvm-config-mp-7.0 --cflags
-I/opt/local/libexec/llvm-7.0/include -pipe -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -fPIC -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wdelete-non-virtual-dtor -Wstring-conversion -DNDEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS

llvm-6.0 and llvm-5.0 still have faulty isysroots that point into Xcode, and they will need to be rebuilt against the command line tools on the buildbots to pick up the correct isysroots that point into the CLTs:

$ llvm-config-mp-6.0 --cflags
-I/opt/local/libexec/llvm-6.0/include -pipe -Os -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -fPIC -Werror=date-time -Werror=unguarded-availability-new -Wall -W -Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wdelete-non-virtual-dtor -Wstring-conversion -DNDEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS

$ llvm-config-mp-5.0 --cflags
-I/opt/local/libexec/llvm-5.0/include -pipe -Os -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -fPIC -Werror=date-time -Wall -W -Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wdelete-non-virtual-dtor -Wstring-conversion -DNDEBUG -DLLVM_BUILD_GLOBAL_ISEL -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS