error : BOOST DISABLE THREADS

Question

i have some problem with my boost library. i m using freebsd and installed my boost using ports. Boost version is : 1.45 and i use g++47 as compiler. Also i have never defined BOOST DISABLE THREADS at there : /usr/local/include/boost/config/user.hpp .Also exactly my error is :

 /usr/local/include/boost/config/requires_threads.hpp:29:4: error: #error "Threading    support unavaliable: it has been explicitly disabled with BOOST_DISABLE_THREADS"  

explicitly but where ?? And my compile command;

 g++47 -O3 -Wall -std=c++0x   -I. -Iinclude -I../include -I/usr/local/include   -c -o     Application.o src/Application.cpp 

Thanks

Answer 1

The experimental GCC version 4.7 disables Boost.Threads. See: https://svn.boost.org/trac/boost/ticket/6165

Edit: It should be noted that as of the release version of GCC 4.7, and Boost higher than 1.48 (Boost_1_48_0 is still not working), threads works again.

Answer 2

See the ticket 6165 mentioned above by Joachim:
To define 'threads' support,

• GCC <= 4.6 defines _GLIBCXX__PTHREADS
• whereas GCC >= 4.7 defines _GLIBCXX_HAS_GTHREADS.

So, in order to compile older Boosts using any GCC more recent than 4.6 you need the patch libstdcpp3.hpp.patch enclosed in that ticket.

Another problem that could also prevent Boost on working with modern compiler is ticket 6940 (TIME_UTC has a special meanhing in C11, therefore Boost >= 1.50 use TIME_UTC_ instead)