Hi,
A colleague and I are experiencing a recurring error when
building/rebuilding Wt on Ubuntu 10.04:
../src/Wt/Dbo/backend/libwtdbosqlite3.a(sqlite3.o): In function `unixDlError':
/home/danny/lib/wt/stage/wt-3.2.3/src/Wt/Dbo/backend/amalgamation/sqlite3.c:29359:
undefined reference to `dlerror'
../src/Wt/Dbo/backend/libwtdbosqlite3.a(sqlite3.o): In function `unixDlClose':
/home/danny/lib/wt/stage/wt-3.2.3/src/Wt/Dbo/backend/amalgamation/sqlite3.c:29390:
undefined reference to `dlclose'
../src/Wt/Dbo/backend/libwtdbosqlite3.a(sqlite3.o): In function `unixDlSym':
/home/danny/lib/wt/stage/wt-3.2.3/src/Wt/Dbo/backend/amalgamation/sqlite3.c:29386:
undefined reference to `dlsym'
../src/Wt/Dbo/backend/libwtdbosqlite3.a(sqlite3.o): In function `unixDlOpen':
/home/danny/lib/wt/stage/wt-3.2.3/src/Wt/Dbo/backend/amalgamation/sqlite3.c:29345:
undefined reference to `dlopen'
/home/danny/lib/boost/boost-trunk/stage/lib/libboost_thread.a(thread.o): In
function `boost::this_thread::hiden::sleep_for(timespec const&)':
thread.cpp:(.text+0xf50): undefined reference to `clock_gettime'
/home/danny/lib/boost/boost-trunk/stage/lib/libboost_thread.a(thread.o): In
function `boost::this_thread::hiden::sleep_until(timespec const&)':
thread.cpp:(.text+0x157d): undefined reference to `clock_gettime'
thread.cpp:(.text+0x15eb): undefined reference to `clock_gettime'
thread.cpp:(.text+0x1659): undefined reference to `clock_gettime'
thread.cpp:(.text+0x16c7): undefined reference to `clock_gettime'
/home/danny/lib/boost/boost-trunk/stage/lib/libboost_thread.a(thread.o):thread.cpp:(.text+0x1735):
more undefined references to `clock_gettime' follow
The problem can be fixed by adding the flags "-lrt" (for clock_gettime) and
"-ldl" (for dlerror/dlclose/dlsym/dlopen) to the linker invocation that
causes these errors. We worked around the problem by adding these flags
manually to the linker invocation, but a proper solution would involve
getting CMake to add them. Should I file a bug for this?
Thanks,
Nate
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