[MacPorts] #57252: p5.26-net-ssleay @1.850.0 - Fails to build after Mojave/Command Line Tools/MacPorts upgrade, assumes sysroot is full XCode installation

[MacPorts]

#57252: p5.26-net-ssleay @1.850.0 - Fails to build after Mojave/Command Line
Tools/MacPorts upgrade, assumes sysroot is full XCode installation
---------------------+------------------------------
 Reporter:  sdohtem  |      Owner:  (none)
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.5.4
 Keywords:           |       Port:  p5.26-net-ssleay
---------------------+------------------------------
 After upgrading to macOS 10.14 Mojave, I re-installed XCode Command Line
 Tools (using `xcode-select --install`) and MacPorts 2.5.4 for Mojave
 (using the PKG installer). After these changes, the p5.26-net-ssleay port
 fails to build. All other ports I use install without issue. Twice I tried
 completely removing both Command Line Tools and MacPorts and then re-
 installing these and the ports I use, but without resolving the p5.26-net-
 ssleay failure. Prior to the upgrades, this port built without any issues.

 Here is the output from `port clean` followed by `port install`:

 {{{
 $ sudo port clean p5.26-net-ssleay
 Warning: xcodebuild exists but failed to execute
 --->  Cleaning p5.26-net-ssleay

 $ sudo port install p5.26-net-ssleay
 Warning: xcodebuild exists but failed to execute
 Warning: Xcode does not appear to be installed; most ports will likely
 fail to build.
 --->  Computing dependencies for p5.26-net-ssleay
 --->  Fetching archive for p5.26-net-ssleay
 ... Several 'Attempting to fetch' lines cut ...
 --->  Attempting to fetch p5.26-net-ssleay-1.850.0_0.darwin_18.x86_64.tbz2
 from http://sea.us.packages.macports.org/macports/packages/p5.26-net-
 ssleay
 --->  Fetching distfiles for p5.26-net-ssleay
 --->  Verifying checksums for p5.26-net-ssleay
 --->  Extracting p5.26-net-ssleay
 --->  Applying patches to p5.26-net-ssleay
 --->  Configuring p5.26-net-ssleay
 --->  Building p5.26-net-ssleay
 Error: Failed to build p5.26-net-ssleay: command execution failed
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_perl_p5
 -net-ssleay/p5.26-net-ssleay/main.log for details.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port p5.26-net-ssleay failed
 }}}

 Attached is the main.log file that `port install` cites at the end of its
 output. I'm not an expert, but line 393 seems to show the culprit: The
 `-isysroot` compiler switch specifies a path that assumes the full XCode
 installation, which is not present on my system. Note that `xcode-select
 -p` returns the correct path to the Command Line Tools installation, which
 contains the SDK specified on line 393 of the log file.

 Not sure if I'm doing something wrong. Hopefully there's a simple fix for
 this. Much appreciated if someone can suggest a reasonably easy
 workaround. Thanks in advance.

-- 
Ticket URL: <https://trac.macports.org/ticket/57252>
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