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.