Hi all, I have found the reason for libtool linking to the wrong stdc++, the problem is that I don't know libtool well enough to propose the "right" solution.
The problem plays out like this: - The stdc++ library is added to the "postdeps" environment variable, like this: postdeps="-lstdc++ -lm -lgcc_s -lgcc_s" - libtool loops through a search path of directories to find this and other libraries: for searchdir in $newlib_search_path $lib_search_path $sys_lib_search_ path $shlib_search_path; do - The variable "lib_search_path" contains the value below: <sourcetree>/src/cpp/eod /usr/local/lib This variable takes precedance over the compiler paths in "sys_lib_search_path" and the system paths in "shlib_search_path". What makes things blow up is the "/usr/local/lib" above - this effectively means that any libstdc++ installed in /usr/local/lib is going to take precedance over the compiler specific libstdc++ that is listed in "sys_lib_search_path". - How did the /usr/local/lib get there in the first place? It was specified to libtool as a -L option on the command line below, which in turn came from LDFLAGS: > /bin/bash ../../libtool --tag=CC --mode=link gcc -I.. -I../.. > -I/usr/local/include/libxml2 -L/usr/local/lib -R/usr/local/lib -lxml2 -lz > -lpthread -liconv -lm -lsocket -lnsl -o libmonacoxml++.la -rpath > /udd001/hoops/usr/lib version.lo ../rtxsrc/libosysrt++.la > ../rtxmlsrc/libosysrtxml++.la eod/libmonacoxmleod++.la -lxml2 -liconv > -lnsl -lsocket -lz -lm -lc - How did -L/usr/local/lib get into LDFLAGS? The libxml2 dependancy did it: bash-2.03$ /usr/local/bin/xml2-config --libs -L/usr/local/lib -R/usr/local/lib -lxml2 -lz -lpthread -liconv -lm -lsocket -lnsl So - is the solution to reorder the $lib_search_path and the $sys_lib_search_path so that sys_lib_search_path is considered first? Or do we handle postdeps specially to ignore $lib_search_path and consider $sys_lib_search_path only for these libraries? Not sure what the "right" way is to do this. Regards, Graham -- _______________________________________________ http://lists.gnu.org/mailman/listinfo/libtool
