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Boost.org thread module
http://boost.org/libs/thread
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Compilation with Mingw-w64 (g++ 5.2.0 and 9.2.0) fails (Boost 1.71.0) #291

Open Bihlerben opened 4 years ago

Bihlerben commented 4 years ago

When trying to compile the example code from this question: https://stackoverflow.com/questions/49453476/using-boost-thread-pool-executor-submit-method compilation fails and this error message is given by both g++ 5.2.0 and g++ 9.2.0 (as part of Mingw-w64):

mingw32-make -j20 all g++ -c -pipe -isystem C:\Libraries\OpenCascade\oce\InstallMingw64\include\oce -isystem C:\Libraries\boost_1_71_0 -std=gnu++1y -Wpedantic -ffunction-sections -fdata-sections -mtune=generic -O2 -DNDEBUG -frtti -fexceptions -mthreads -Wall -Wextra -DUNICODE -DQT_DLL -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I [... here come the include directories] -o Main.o ..\src\Main.cpp In file included from C:\Libraries\boost_1_71_0/boost/thread/detail/thread.hpp:26:0, from C:\Libraries\boost_1_71_0/boost/thread/thread_only.hpp:22, from C:\Libraries\boost_1_71_0/boost/thread/thread.hpp:12, from C:\Libraries\boost_1_71_0/boost/thread.hpp:13, from ..\src\Main.cpp:7: C:\Libraries\boost_1_71_0/boost/thread/detail/invoke.hpp: In function 'decltype ((forward)(boost::detail::invoke::a0).boost::detail::invoke::f) boost::detail::invoke(Fp&&, A0&&) [with Fp = void (boost::executors::basic_thread_pool::)(); A0 = boost::executors::basic_thread_pool; decltype ((forward)(boost::detail::invoke::a0).boost::detail::invoke::f) = void (boost::executors::basic_thread_pool::)()]': C:\Libraries\boost_1_71_0/boost/thread/detail/invoke.hpp:102:43: internal compiler error: in gimplify_expr, at gimplify.c:8786 return (boost::forward(a0)).f; ^ libbacktrace could not find executable to open Please submit a full bug report, with preprocessed source if appropriate. See http://sourceforge.net/projects/mingw-w64 for instructions. mingw32-make: *** [Main.o] Error 1 Makefile:187: recipe for target 'Main.o' failed "mingw32-make -j20 all" terminated with exit code 2. Build might be incomplete.

Bihlerben commented 4 years ago

Oh, did I make a mistake and this is actually a gcc bug? Would you still have a look at it and see whether there is a workaround?

Bihlerben commented 4 years ago

By the way, "#define BOOST_THREAD_PROVIDES_EXECUTORS" seems to be the culprit that triggers the error.

Bihlerben commented 4 years ago

One more remark: I can solve the compilation issues by using #define BOOST_NO_SFINAE_EXPR.

viboes commented 4 years ago

If you don't want to use executors you can not define BOOST_THREAD_PROVIDES_EXECUTORS, but then the example has less sense.

BOOST_NO_SFINAE_EXPR is defined or not by Boost.Config. If this i sthe thing to change, you should provide a patch to Boost.Config so that it is defined according to the compiler version.

Anyway, the invoke function in C++98 is quite fragile, and maybe need adaptation to new compiler version or platforms the Boost.Thread library was not aware of, when the code was created.

Boost.Thread don't work well with Mingw :(

Bihlerben commented 4 years ago

Hmmm, I was trying to use boost::async and boost::future as a thread-pool-ready replacement for std::async and std::future with Mingw. Perhaps it is not yet the right time to do that...?

I have posted a question regarding my current problem here: https://stackoverflow.com/questions/57987570/why-do-iterative-calls-to-boostasync-get-stuck-when-using-a-thread-pool.

Your code looks promising and is thrilling. I hope that you proceed and that I eventually get it to work with Mingw.