Failing to build callcc test with g++-4.9

[DaoWen]

The callcc test fails to build when using version 4.9 of the GCC toolchain. The compiler gives an error about ambiguous overloads of the callcc function, which I think is a known bug in gcc-4.9 that was fixed in gcc-5.

I got the same error on Linux for in both PowerPC (32-bit) and x86_64 builds. Unfortunately, gcc-4.9 was the newest compiler I was able to get installed on the 32-bit PowerPC system for testing, so without support for that toolchain I can't test the ppc/sysv/elf platform (see #50).

I tried adding an extra disable_overload to disambiguate the call, which allowed me to compile, but then the test failed due to bad values being passed through the continuation object... I will try to look at this again later, but you're obviously more familiar with the codebase, and I'm hoping if you can get g++-4.9 installed that you'll have a much easier time debugging this.

[olk]

You could compile the unit-tests without "-std=c++" - then only fcontext-API (asm implementation) is tested.

I can check if a workaround is available for gcc-4.8/gcc-4.9 - several versions of clang, intel, msvc are able to build boost.context.

[DaoWen]

You could compile the unit-tests without "-std=c++" - then only fcontext-API (asm implementation) is tested.

Yes, I actually tried building with gcc-4.7 first (which doesn't support thread_local), and the fcontext tests passed. I suppose that should be sufficient for verifying the ppc32 code, so I won't worry about this issue anymore. Thanks!

[olk]

fine - ty