In "/wand/MagickWand-config.in", and in the resulting "/usr/bin/MagickWand-config" output, when "--cppflags" is specified, "pkg-config --clags MagickWand" is run, with "--clags" being a misspelling of "--cflags".
This results in build failures for some software relying on MagickWand-config.
In the latest repository version, it's "--cflags" (correct).
"--clags" typo. in MagickWand-config (6.9.8-2)
Re: "--clags" typo. in MagickWand-config (6.9.8-2) [FIXED]
This appears to have been fixed in 6.9.8-3.