Hi, from time to time I use my automake/libtool project to build libraries on windows ... this create al least problems ... my actual problem is, I got a tcl distrubution from activestate providing a libraray: C:/Tcl/lib/tcl8.6.lib and using the libtool command: /bin/sh ../../libtool --tag=CC --mode=link /usr/bin/ccache x86_64-w64-mingw32-gcc -std=gnu99 -shared -I/home/dev1usr/Project/NHI1/theLink/tclmsgque/../libmsgque -IC:/Tcl/include -DMQ_IGNORE_EXTERN -g -Wall -Wcast-align -g -O2 -shared -module -avoid-version -no-undefined*-LC:/Tcl/lib -ltcl86* -o tclmsgque.la -rpath /usr/local/lib/NHI1 tclmsgque_la-MqS_tcl.lo tclmsgque_la-misc_tcl.lo tclmsgque_la-msgque_tcl.lo tclmsgque_la-read_tcl.lo tclmsgque_la-send_tcl.lo tclmsgque_la-config_tcl.lo tclmsgque_la-service_tcl.lo tclmsgque_la-slave_tcl.lo tclmsgque_la-MqBufferS_tcl.lo tclmsgque_la-error_tcl.lo tclmsgque_la-link_tcl.lo tclmsgque_la-MqFactoryS_tcl.lo tclmsgque_la-MqDumpS_tcl.lo ../libmsgque/libtmp.la with "*-LC:/Tcl/lib -ltcl86*" I got the mystic libtool error message that the library is NOT found ... using the "--debug" option give a hint .... libtool does not serach for the "right" name ... If I copy the file tcl86.lib to libtcl86.a in the same directory .... => everything works fine. and now my question: why does "libtool" on "windows" does NOT search for "*.lib" files => enduser would be happy to save debugging hours ;-) Hint, I use the mingw cross compiler but this is NOT the problem. mfg AO