[MacPorts] #57415: hdf5 should not offer gcc variants that won't work (was: gcc9 fails to install on High Sierra Xcode10)

[MacPorts]

#57415: hdf5 should not offer gcc variants that won't work
----------------------+----------------------
  Reporter:  SebKeen  |      Owner:  mamoll
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.5.4
Resolution:           |   Keywords:
      Port:  hdf5     |
----------------------+----------------------
Changes (by jmroot):

 * status:  new => assigned
 * owner:  (none) => mamoll
 * keywords:  hdf5 =>
 * port:  gcc9 => hdf5


Old description:

> Hi,
>
> I just tried to install a new port, and had to update mac port to version
> 2.5.4, and also Xcode to version 10. The port fails to update because of
> dependencies related to gcc49 and message that the compiler is not
> supported for Xcode 9.0 and higher. Thus, I tried to port install gcc9,
> and this again fails because of a dependency on hdf5-18
> @1.8.17+cxx+gcc49+hl.
>
> Here is the log:
>
> bash-3.2$ sudo port install gcc9
> --->  Computing dependencies for gcc9
> --->  Cleaning gcc9
> --->  Scanning binaries for linking errors
> --->  Found 9 broken files, matching files to ports
> --->  Found 5 broken ports, determining rebuild order
> You can always run 'port rev-upgrade' again to fix errors.
> The following ports will be rebuilt:
>  hdf5-18 @1.8.17+cxx+gcc49+hl
>  cdo @1.7.2+szip
>  ncview @2.1.1
>  wgrib2 @2.0.5
>  grads @2.0.2
> Continue? [Y/n]: y
> --->  hdf5-18 is replaced by hdf5
> --->  Fetching distfiles for gcc49
> Error: building gcc49 is not supported with Xcode 9 or greater
> Error: Failed to fetch gcc49: unsupported platform
> Error: See
> /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/gcc49/main.log
> for details.
> Error: Problem while installing gcc49
> Error: rev-upgrade failed: Error rebuilding hdf5-18
> Error: Follow https://guide.macports.org/#project.tickets to report a
> bug.
>
> I hope someone can point in the right direction.
>
> Noel

New description:

 Hi,

 I just tried to install a new port, and had to update mac port to version
 2.5.4, and also Xcode to version 10. The port fails to update because of
 dependencies related to gcc49 and message that the compiler is not
 supported for Xcode 9.0 and higher. Thus, I tried to port install gcc9,
 and this again fails because of a dependency on hdf5-18
 @1.8.17+cxx+gcc49+hl.

 Here is the log:
 {{{
 bash-3.2$ sudo port install gcc9
 --->  Computing dependencies for gcc9
 --->  Cleaning gcc9
 --->  Scanning binaries for linking errors
 --->  Found 9 broken files, matching files to ports
 --->  Found 5 broken ports, determining rebuild order
 You can always run 'port rev-upgrade' again to fix errors.
 The following ports will be rebuilt:
  hdf5-18 @1.8.17+cxx+gcc49+hl
  cdo @1.7.2+szip
  ncview @2.1.1
  wgrib2 @2.0.5
  grads @2.0.2
 Continue? [Y/n]: y
 --->  hdf5-18 is replaced by hdf5
 --->  Fetching distfiles for gcc49
 Error: building gcc49 is not supported with Xcode 9 or greater
 Error: Failed to fetch gcc49: unsupported platform
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/gcc49/main.log
 for details.
 Error: Problem while installing gcc49
 Error: rev-upgrade failed: Error rebuilding hdf5-18
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 }}}
 I hope someone can point in the right direction.

 Noel

--

Comment:

 You installed gcc9 successfully; the failure was in rebuilding hdf5-18,
 which was found to be broken by rev-upgrade (which runs automatically
 after each installation and checks all installed ports). hdf5-18 has been
 replaced by hdf5, so hdf5 was built with the same variants that hdf5-18
 was previously installed with, but the gcc49 variant no longer works with
 your new Xcode version.

 You can fix this by simply uninstalling hdf5-18 and installing hdf5 with
 some newer gcc variant. However it seems like hdf5 shouldn't offer the
 variant in the first place when it won't work.

-- 
Ticket URL: <https://trac.macports.org/ticket/57415#comment:1>
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