libkml @1.2.0 (gis) Build fails with clang due to -Werror

[philip.dutoit@…]

Mac OS X 10.7.2
Xcode 4.2.1
Apple clang version 3.0 (tags/Apple/clang-211.12) (based on LLVM 3.0svn)
Target: x86_64-apple-darwin11.2.0

Attempting to do a simple install of libkml 1.2.0.
The build fails with an error.
The complete log file is attached.

joshua:~ pdutoit$ sudo port install libkml
--->  Computing dependencies for libkml
--->  Building libkml
Error: Target org.macports.build returned: shell command failed (see log for details)
Log for libkml is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_gis_libkml/libkml/main.log
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>

Relevant line in the log file is:

:info:build google_maps_data.cc:183:22: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses]

Appears that an extra pair of parentheses is needed to avoid the assignment-vs-equality mistake.

[ryandesign (Ryan Carsten Schmidt)]

That is not a complete log. (It contains lines that say "Skipping completed".) Please "sudo port clean libkml" and try again.

[ryandesign (Ryan Carsten Schmidt)]

I see there is an ​upstream bug report already filed.

[philip.dutoit@…]

Full log after running "sudo port clean libkml"

[jmroot (Joshua Root)]

Just needs to not use -Werror. Unfortunately it looks like it's hardcoded into all the Makefiles.

[ryandesign (Ryan Carsten Schmidt)]

r95685