Hi all, i run into a strange problem which i can't solve alone. The complete projects builds fine (no errors or warnings) but the programm will not start afterwards because one library (-lboost_date_time) is simply not present when i run ldd on it. In the Makefile.am i have defined something like this: libmodwscmi_la_CXXFLAGS = $(INCLUDES) $(PROJECT_INCLUDES) $(APR_CFLAGS) libmodwscmi_la_LDFLAGS = $(LDADD) $(BOOST_LDFLAGS) $(LIB_BOOST_REGEX) $(LIB_BOOST_DATETIME) `$(APR1CONFIG) --link-ld --libs` libmodwscmi_la_LIBADD = $(top_builddir)/utils/mysqlpp/libmysqlpp.la $(top_builddir)/utils/jwsmtp/libjwsmtp.la During build the linker gets called with this command: g++ -fPIC -DPIC -shared -nostdlib /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/4.7/crtbeginS.o .libs/libmodwscmi_la-mod_wscmi.o .libs/libmodwscmi_la-mod_gsoap.o .libs/libmodwscmi_la-mod_utils.o .libs/libmodwscmi_la-mod_mysql.o .libs/libmodwscmi_la-md5.o .libs/libmodwscmi_la-regEx.o .libs/libmodwscmi_la-utils.o .libs/libmodwscmi_la-exception.o .libs/libmodwscmi_la-dateTime.o .libs/libmodwscmi_la-validator.o .libs/libmodwscmi_la-mysqlPool.o .libs/libmodwscmi_la-mysqlCons.o .libs/libmodwscmi_la-mysqlQueries.o .libs/libmodwscmi_la-sqlite3.o -Wl,-rpath -Wl,/var/www/projects/mod_wscmi-1.0/utils/mysqlpp/.libs -Wl,-rpath -Wl,/var/www/projects/mod_wscmi-1.0/utils/jwsmtp/.libs -L/usr/local/lib -lboost_date_time -lboost_regex -L/usr/lib /usr/lib/libapr-1.so -L/usr/local/mysql/lib ../utils/mysqlpp/.libs/libmysqlpp.so ../utils/jwsmtp/.libs/libjwsmtp.so -L/usr/lib/gcc/x86_64-linux-gnu/4.7 -L/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/4.7/../../.. -lstdc++ -lm -lc -lgcc_s /usr/lib/gcc/x86_64-linux-gnu/4.7/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/crtn.o -pthread -O3 -Wl,-R/usr/local/lib -pthread -Wl,-soname -Wl,libmodwscmi.so.0 -o .libs/libmodwscmi.so.0.0.0 As you can see above, both libraries are present: -lboost_date_time -lboost_regex - they are also present in the right place of my harddrive (in /use/local/lib) and there are no warnings or errors during the build: ... -rw-r--r-- 1 root 136876 Nov 20 09:19 libboost_date_time.a lrwxrwxrwx 1 root 28 Nov 20 09:18 libboost_date_time.so -> libboost_date_time.so.1.52.0 -rwxr-xr-x 1 root 94337 Nov 20 09:18 libboost_date_time.so.1.52.0 ... -rw-r--r-- 1 root 2619610 Nov 20 09:19 libboost_regex.a lrwxrwxrwx 1 root 24 Nov 20 09:18 libboost_regex.so -> libboost_regex.so.1.52.0 -rwxr-xr-x 1 root 1251576 Nov 20 09:18 libboost_regex.so.1.52.0 ... When i run LDD on the finaly library i get something like this: ldd /usr/local/apache/modules/mod_wscmi.so linux-vdso.so.1 => (0x00007fffeafff000) libboost_regex.so.1.52.0 => /usr/local/lib/libboost_regex.so.1.52.0 (0x00007fcfe8bc5000) libapr-1.so.0 => /usr/lib/libapr-1.so.0 (0x00007fcfe8974000) libmysqlpp.so.0 => /usr/local/lib/libmysqlpp.so.0 (0x00007fcfe86f4000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fcfe83f1000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fcfe8031000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fcfe7e1b000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fcfe7bfe000) libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007fcfe79f8000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fcfe77f4000) libmysqlclient.so.18 => /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18 (0x00007fcfe72b0000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fcfe6fb3000) /lib64/ld-linux-x86-64.so.2 (0x00007fcfe91a8000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fcfe6d9c000) Running the same command on another box includes the missing library (libboost_date_time.so) and the programm works as expected but on this box (Ubuntu 12.10 - GNU/Linux 3.5.0-21-generic x86_64) it can't start because of some undefined symbols. I have absolutly no idea what went wrong here and why libboost_date_time is not included correctly. Hopefully someone of the list could give me an hint. Thanks Michael
