LTTng » LTTng-tools

Using the latest 2.2.0-rc1 suite, since the gold linker is no longer listed as required by the lttng-tools README, I removed it (removed the binutils-gold package) to revert to the default linker, and then tried to rebuild lttng-tools. To my surprise, it failed with "undefined reference to symbol 'timer_settime@@GLIBC_2.3.3'". Stranger yet, rebuilding it with LDFLAGS=-L/usr/local/lib passed to the configure call fixed the problem. My understanding was that the gold linker needed LDFLAGS=-L/usr/local/lib in the configure because it ignored ld.so.conf, so the default linker should not have the same problem.

The build is:

./bootstrap &> bootstrap.log
./configure --enable-python-bindings &> configure.log
./make &> make.log

The failure is:

[...]
Making all in lttng-consumerd
make[3]: Entering directory `/home/daniel/Documents/lttng-tools-dec56f6/src/bin/lttng-consumerd'
  CC     lttng-consumerd.o
  CCLD   lttng-consumerd
/usr/bin/ld: ../../../src/common/.libs/libconsumer.a(consumer-timer.o): undefined reference to symbol 'timer_settime@@GLIBC_2.3.3'
/usr/bin/ld: note: 'timer_settime@@GLIBC_2.3.3' is defined in DSO /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/librt.so so try adding it to the linker command line
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/librt.so: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make[3]: *** [lttng-consumerd] Error 1
make[3]: Leaving directory `/home/daniel/Documents/lttng-tools-dec56f6/src/bin/lttng-consumerd'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/daniel/Documents/lttng-tools-dec56f6/src/bin'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/daniel/Documents/lttng-tools-dec56f6/src'
make: *** [all-recursive] Error 1

The logs are attached.