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 g++ -DHAVE_CONFIG_H -I. -I../../ace -I. -I../.. -I.. -DACE_BUILD_DLL -D_REENTRANT -D_THREAD_SAFE -W -Wall -Wpointer-arith -g -O2 -pthread -pipe -O -I. -I.. -MT libACE_la-Dev_Poll_Reactor.lo -MD -MP -MF .deps/libACE_la-Dev_Poll_Reactor.Tpo -c ../../ace/Dev_Poll_Reactor.cpp  -fPIC -DPIC -o .libs/libACE_la-Dev_Poll_Reactor.o
In file included from ../../ace/OS_NS_signal.h:149,
                 from ../../ace/Signal.h:29,
                 from ../../ace/Dev_Poll_Reactor.cpp:5:
../../ace/OS_NS_signal.inl: In function `int ACE_OS::pthread_sigmask(int, const 
   sigset_t*, sigset_t*)':
../../ace/OS_NS_signal.inl:31: error: `::pthread_sigmask' undeclared (first use 
   here)
*** Error code 1

Stop in /usr/local/packages/ACE_wrappers/build/ace (line 3233 of Makefile).
*** Error code 1

Stop in /usr/local/packages/ACE_wrappers/build/ace (line 5098 of Makefile).
*** Error code 1

Stop in /usr/local/packages/ACE_wrappers/build/ace (line 2430 of Makefile).
*** Error code 1

Stop in /usr/local/packages/ACE_wrappers/build (line 453 of Makefile).
#