libpixman fails to build on 10.13.6

[JohnFHall (John Hall)]

cat /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/main.log
version:1
:debug:sysinfo macOS 10.13 (darwin/17.7.0) arch i386
:debug:sysinfo MacPorts 2.5.4
:debug:sysinfo Xcode 10.1
:debug:sysinfo SDK 10.13
:debug:sysinfo MACOSX_DEPLOYMENT_TARGET: 10.13
:debug:main Checking for conflicts against libpixman
:debug:main Searching for dependency: libpixman-devel
:debug:main Didn't find receipt, going to depspec regex for: libpixman-devel
:debug:main Executing org.macports.main (libpixman)
:debug:main dropping privileges: euid changed to 505, egid changed to 502.
:debug:archivefetch archivefetch phase started at Mon Feb 25 20:30:51 AEDT 2019
:msg:archivefetch --->  Fetching archive for libpixman
:debug:archivefetch Executing org.macports.archivefetch (libpixman)
:debug:archivefetch euid/egid changed to: 0/0
:debug:archivefetch chowned /opt/local/var/macports/incoming to macports
:debug:archivefetch euid/egid changed to: 505/502
:info:archivefetch --->  libpixman-0.38.0_0+universal.darwin_17.i386-x86_64.tbz2 doesn't seem to exist in /opt/local/var/macports/incoming/verified
:msg:archivefetch --->  Attempting to fetch libpixman-0.38.0_0+universal.darwin_17.i386-x86_64.tbz2 from http://nou.nc.packages.macports.org/pub/macports/packages.macports.org/libpixman
:debug:archivefetch Fetching archive failed: The requested URL returned error: 404 Not Found
:msg:archivefetch --->  Attempting to fetch libpixman-0.38.0_0+universal.darwin_17.i386-x86_64.tbz2 from http://jog.id.packages.macports.org/macports/packages/libpixman
:debug:archivefetch Fetching archive failed: The requested URL returned error: 404 Not Found
:msg:archivefetch --->  Attempting to fetch libpixman-0.38.0_0+universal.darwin_17.i386-x86_64.tbz2 from http://kmq.jp.packages.macports.org/libpixman
:debug:archivefetch Fetching archive failed: The requested URL returned error: 404 Not Found
:debug:archivefetch Privilege de-escalation not attempted as not running as root.
:debug:fetch fetch phase started at Mon Feb 25 20:30:54 AEDT 2019
:notice:fetch --->  Fetching distfiles for libpixman
:debug:fetch Executing org.macports.fetch (libpixman)
:debug:fetch Privilege de-escalation not attempted as not running as root.
:debug:checksum checksum phase started at Mon Feb 25 20:30:54 AEDT 2019
:notice:checksum --->  Verifying checksums for libpixman
:debug:checksum Executing org.macports.checksum (libpixman)
:info:checksum --->  Checksumming pixman-0.38.0.tar.bz2
:debug:checksum Calculated (rmd160) is 85045d35b5109c58fcdf577df36b61b32107fd99
:debug:checksum Correct (rmd160) checksum for pixman-0.38.0.tar.bz2
:debug:checksum Calculated (sha256) is b768e3f7895ddebdc0f07478729d9cec4fe0a9d2201f828c900d67b0e5b436a8
:debug:checksum Correct (sha256) checksum for pixman-0.38.0.tar.bz2
:debug:checksum Calculated (size) is 747654
:debug:checksum Correct (size) checksum for pixman-0.38.0.tar.bz2
:debug:checksum Privilege de-escalation not attempted as not running as root.
:debug:extract extract phase started at Mon Feb 25 20:30:54 AEDT 2019
:notice:extract --->  Extracting libpixman
:debug:extract setting option extract.cmd to /usr/bin/bzip2
:debug:extract Executing org.macports.extract (libpixman)
:info:extract --->  Extracting pixman-0.38.0.tar.bz2
:debug:extract setting option extract.args to '/opt/local/var/macports/distfiles/libpixman-devel/pixman-0.38.0.tar.bz2'
:debug:extract Environment: 
:debug:extract CC_PRINT_OPTIONS='YES'
:debug:extract CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work/.CC_PRINT_OPTIONS'
:debug:extract CPATH='/opt/local/include'
:debug:extract LIBRARY_PATH='/opt/local/lib'
:debug:extract MACOSX_DEPLOYMENT_TARGET='10.13'
:info:extract Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work" && /usr/bin/bzip2 -dc '/opt/local/var/macports/distfiles/libpixman-devel/pixman-0.38.0.tar.bz2' | /usr/bin/tar -xf - 
:debug:extract system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work" && /usr/bin/bzip2 -dc '/opt/local/var/macports/distfiles/libpixman-devel/pixman-0.38.0.tar.bz2' | /usr/bin/tar -xf - 
:debug:extract euid/egid changed to: 0/0
:debug:extract chowned /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work to macports
:debug:extract euid/egid changed to: 505/502
:debug:extract Privilege de-escalation not attempted as not running as root.
:debug:patch patch phase started at Mon Feb 25 20:30:54 AEDT 2019
:debug:patch Executing org.macports.patch (libpixman)
:notice:patch --->  Applying patches to libpixman
:info:patch --->  Applying patch-pixman-pixman-vmx.c.diff
:debug:patch Environment: 
:debug:patch CC_PRINT_OPTIONS='YES'
:debug:patch CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work/.CC_PRINT_OPTIONS'
:debug:patch CPATH='/opt/local/include'
:debug:patch LIBRARY_PATH='/opt/local/lib'
:debug:patch MACOSX_DEPLOYMENT_TARGET='10.13'
:info:patch Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work/pixman-0.38.0" && /usr/bin/patch -p0 < '/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/graphics/libpixman/files/patch-pixman-pixman-vmx.c.diff'
:debug:patch system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work/pixman-0.38.0" && /usr/bin/patch -p0 < '/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/graphics/libpixman/files/patch-pixman-pixman-vmx.c.diff'
:info:patch patching file pixman/pixman-vmx.c
:debug:patch Privilege de-escalation not attempted as not running as root.
:debug:configure configure phase started at Mon Feb 25 20:30:54 AEDT 2019
:notice:configure --->  Configuring libpixman
:debug:configure Preferred compilers: clang macports-clang-5.0 macports-clang-4.0
:debug:configure Using compiler 'Xcode Clang'
:debug:configure Executing org.macports.configure (libpixman)
:info:configure --->  Configuring libpixman for architecture x86_64
:debug:configure setting option configure.dir to /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work/pixman-0.38.0-x86_64
:debug:configure setting option autoreconf.dir to /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work/pixman-0.38.0-x86_64
:debug:configure setting option autoconf.dir to /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/work/pixman-0.38.0-x86_64
:error:configure Unable to determine location of a macOS SDK.
:error:configure Failed to configure libpixman: can't read "configure.sdkroot": Unable to determine location of a macOS SDK.
:debug:configure Error code: NONE
:debug:configure Backtrace: can't read "configure.sdkroot": Unable to determine location of a macOS SDK.
:debug:configure     while executing
:debug:configure "$procedure $targetname"
:error:configure See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_libpixman/libpixman/main.log for details.

[JohnFHall (John Hall)]

Oops! Please close.

My Xcode recently crashed, and (I believe) somehow corrupted Command-line tools install.

Reinstalling Command-line tools allowed libpixman 0.38.0_0+universal to install.

Sorry for the hassle.

Thanks, John