Bug#651655: slang-slirp FTBFS in sid "configure: error: unable to find the slang library and header file slang.h"

[peter green]

package: slang-slirp
severity: serious
version:  2.2.4-5

slang-slirp FTBFS in sid. This issue was initially seen on the armhf buildd
but I could reproduce locally on amd64

https://buildd.debian.org/status/fetch.php?pkg=slang-slirp&arch=armhf&ver=1.9.8-1.1&stamp=1322452414
https://buildd.debian.org/status/fetch.php?pkg=slang-slirp&arch=s390x&ver=1.9.8-1.1&stamp=1322385621

>checking for Fortran name-mangling scheme... lower case, underscore, 
no extra underscore
>configure: error: unable to find the slang library and header file slang.h
>checking for the slang library and header files ... no
>make: *** [debian/stamp-autotools] Error 1

config.log didn't seem to have anything of interest and I was unable to
make sense of the check code in configure.