gperf: error: ./configure failed for lib

[ungur (Liviu Ungur)]

I have built MacPorts version 2.6.4 using the git version, branch release-2.6. Configuration and installation went fine. However, I realized that I cannot install any port. The failed attempt to install gcc10 led to the following error:

mymac@MacBook-Pro macports-base.git % sudo port install gcc10
Warning: The macOS 11.0 SDK does not appear to be installed. Ports may not build correctly.
Warning: You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install'.
--->  Computing dependencies for gcc10
The following dependencies will be installed: 
 autoconf
 automake
 bzip2
 cctools
 cmake
 curl
 curl-ca-bundle
 db48
 expat
 gcc_select
 gdbm
 gettext
 glib2
 gmp
 gperf
 help2man
 icu
 isl
 ld64
 ld64-xcode
 libarchive
 libcxx
 libedit
 libffi
 libgcc
 libgcc10
 libiconv
 libidn2
 libmpc
 libpsl
 libtool
 libunistring
 libunwind-headers
 libuv
 libxml2
 llvm-10
 llvm_select
 lz4
 lzo2
 mpfr
 ncurses
 openssl
 p5.28-locale-gettext
 pcre
 perl5.28
 perl5.30
 pkgconfig
 python38
 python3_select
 python_select
 readline
 sqlite3
 texinfo
 xar
 xz
 zlib
 zstd
Continue? [Y/n]: Y
Warning: The macOS 11.0 SDK does not appear to be installed. Ports may not build correctly.
Warning: You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install'.
--->  Fetching archive for gperf
--->  Attempting to fetch gperf-3.1_0.darwin_20.x86_64.tbz2 from http://jog.id.packages.macports.org/macports/packages/gperf
--->  Attempting to fetch gperf-3.1_0.darwin_20.x86_64.tbz2 from https://kmq.jp.packages.macports.org/gperf
--->  Attempting to fetch gperf-3.1_0.darwin_20.x86_64.tbz2 from https://pek.cn.packages.macports.org/macports/packages/gperf
--->  Configuring gperf
Error: Failed to configure gperf, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gperf/gperf/work/gperf-3.1/config.log
Error: Failed to configure gperf: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gperf/gperf/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port gcc10 failed

---

gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 12.0.0 (clang-1200.0.32.27)
Target: x86_64-apple-darwin20.1.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

[ungur (Liviu Ungur)]

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gperf/gperf/work/gperf-3.1/config.log

[ryandesign (Ryan Carsten Schmidt)]

The config.log doesn't say much, just:

error: ./configure failed for lib

I am surprised by the message "The macOS 11.0 SDK does not appear to be installed" because with Xcode 12.2 you should have the macOS 11.0 SDK. Can you please verify whether the macOS 11.0 SDK exists in /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/? If it does not, reinstall Xcode 12.2. Also verify that the macOS 11.0 SDK exists in /Library/Developer/CommandLineTools/SDKs/; if it does not, reinstall the Xcode 12.2 command line tools.

[ungur (Liviu Ungur)]

It looks like the mentioned SDK folder is not empty. It weights about 265 MB.

mymac@MacBook-Pro ~ % ll /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/
total 0
drwxr-xr-x  5 root  wheel  160 Oct 20 04:33 DriverKit20.0.sdk/
lrwxr-xr-x  1 root  wheel   10 Nov 13 14:04 MacOSX11.0.sdk -> MacOSX.sdk
drwxr-xr-x  7 root  wheel  224 Nov 13 14:13 MacOSX.sdk/

The command-line tool are also present:

mymac@MacBook-Pro ~ % ll /Library/Developer/CommandLineTools/SDKs/
total 0
drwxr-xr-x  7 root  wheel  224 Jul 16  2019 MacOSX10.14.sdk/
drwxr-xr-x  8 root  wheel  256 Aug 30  2019 MacOSX10.15.sdk/
lrwxr-xr-x  1 root  wheel   15 Oct 10  2019 MacOSX.sdk -> MacOSX10.15.sdk

[ryandesign (Ryan Carsten Schmidt)]

Your command line tools are outdated: they don't contain the macOS 11 SDK. Update to the Xcode 12.2 command line tools.

[ungur (Liviu Ungur)]

Thanks for this suggestion. After updating the SDK to the latest version -- macports works fine. The ticket may be closed now. Thanks again for the help!