Comment #1 on issue 188 by xarthisius.kk: protobuf fails to link after
compiling with LDFLAGS="-Wl,--as-needed" because of missing -lpthread
http://code.google.com/p/protobuf/issues/detail?id=188
To be exact: macro in acx_pthread.m4 searches for flags providing threads
deps in a
following order:
... -pthread ... -lpthread
and is satisfied with whatever works first. As a result it settles with
-pthread.
It's error prone because -pthread is treated as CFLAG, and is not passed
during
linking phase.
Switching order to:
... -lpthread ... -pthread
adds -lpthread to LIBS instead, which is properly used during linking.
Best regards,
Kacper Kowalik
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