Hello, i moved this topic from the users to the developer list. Sorry for this cross posting. Here the original question: i'm trying to compile Freeradius 2.1.3 under Cygwin. I used './configure --without-rlm_perl' and './configure --without-rlm_perl --without-snmp --enable-static' which compile successfully. I'm using a fresh cygwin installation and 'make install' works great. But when i start 'radiusd -X' i always get: ... realm LOCAL { } radiusd: #### Instantiating modules #### instantiate { /usr/local/etc/raddb/modules/exec[24]: Failed to link to module 'rlm_exec': No such file or directory Errors initializing modules I do have the files rlm_exec-2.1.3.la, rlm_exec.a and rlm_exec.la in /usr/local/lib. Note, that the problem is not specific to rlm_exec. Same is true e.g. for rlm_expr and i think my installation is not able to load any rlm_*file. Shouldn't be there some typ of .dll/.so? Could anybody please tell my who to make freeradius for windows/cygwin. That was the original posting. Now i know more: The problem is releted to the following libtool error: *** Warning: This system can not link to static lib archive ../../libeap/libfreeradius-eap.la. *** I have the capability to make that library automatically link in when *** you link to this library. But I can only do this if you have a *** shared version of the library, which you do not appear to have. *** But as you try to build a module library, libtool will still create *** a static module, that should work as long as the dlopening application *** is linked with the -dlopen flag to resolve symbols at runtime. libtool: link: warning: undefined symbols not allowed in i686-pc-cygwin shared libraries libtool never builds dll files under cygwin if -no-undefined is not specified on the command line. I change a line in src/lib (LINK_MODE = -export-dynamic -no-undefined) and got a dll. Than i have done the same on rules.mak and here the make failed: /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/libtool --mode=link gcc -release 2.1.3 \ -no-undefined -module -export-dynamic -o rlm_acctlog.la \ -rpath /usr/local/lib rlm_acctlog.lo rlm_acctlog.c /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/lib/libfreeradius-radius.la -lws2_32 -lpthread gcc -shared .libs/rlm_acctlog.o /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/lib/.libs/libfreeradius-radius.dll.a -lws2_32 -lpthread -o .libs/rlm _acctlog-2-1-3.dll -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker .libs/rlm_acctlog.dll.a .libs/rlm_acctlog.o: In function `acctlog_instantiate': /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/modules/rlm_acctlog/rlm_acctlog.c:63: undefined reference to `_rad_malloc' /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/modules/rlm_acctlog/rlm_acctlog.c:66: undefined reference to `_cf_section_parse' .libs/rlm_acctlog.o: In function `do_acctlog_acct': /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/modules/rlm_acctlog/rlm_acctlog.c:110: undefined reference to `_radius_xlat' /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/modules/rlm_acctlog/rlm_acctlog.c:116: undefined reference to `_radlog' /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/modules/rlm_acctlog/rlm_acctlog.c:91: undefined reference to `_radius_xlat' /cygdrive/g/Daten/freeradius/freeradius-server-2.1.3/src/modules/rlm_acctlog/rlm_acctlog.c:92: undefined reference to `_radlog' Creating library file: .libs/rlm_acctlog.dll.a collect2: ld returned 1 exit status make[6]: *** [rlm_acctlog.la] Error 1 To fix this i would have to put all the functions undefined here in a dll. This is far beyond me knowledge of freeradius and sigificantly exceeds me time frame for implementing a Radius server :-( Any further suggestions? Can i link the rlm* modules statically to radiusd? Thanks for any help. Joachim Altenhein