libWINGs is using mathematical functions (atan, sqrt, etc.). Check
whether we need to lik against libm to use these and link libWINGs
against it if necessary.
libWINGs is using libwraster functions (e.g. RScaleImage) and therefore
needs to be linked against it.
ametzler@argenau:/tmp/WMAKER/wmaker-crm$ env LD_LIBRARY_PATH=debian/wmaker/usr/lib ldd -r debian/wmaker/usr/lib/libWINGs.so.2.0.1 2>&1 | grep RScaleIma
undefined symbol: RScaleImage (debian/wmaker/usr/lib/libWINGs.so.2.0.1)
libWINGs is using libWUtil functions (e.g. WMAddIdleHandler). Reorder
lib_LTLIBRARIES to build libWUtil before libWINGs. Link libWINGs against
libWUtil.