Re: [Cppcms-users] FreeBSD 11+clang fails to build backtrace.cpp

[Artyom B. <art...@gm...>]

Ok thanks...

I'll apply the patch

Artyom

On Sat, Feb 11, 2017 at 9:02 PM, Nazım Can Bedir
<naz...@ne...> wrote:
> Hi Artyom,
>
> This looks like related with closed bug "#78 FreeBSD+clang w/ c++11 fails to
> build backtrace.cpp...".
>
> Operating system:
>
> $ uname -a
> FreeBSD web1.bhyve.local 11.0-RELEASE-p1 FreeBSD 11.0-RELEASE-p1 #0 r306420:
> Thu Sep 29 01:43:23 UTC 2016
> ro...@re...:/usr/obj/usr/src/sys/GENERIC  amd64
>
> Compiler:
>
> $ clang --version
> FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM
> 3.8.0)
> Target: x86_64-unknown-freebsd11.0
> Thread model: posix
> InstalledDir: /usr/bin
>
> When trying to compile CppCMS on this system, compiler generates following
> errors:
>
> $ make
> [  0%] Building CXX object
> booster/CMakeFiles/booster.dir/lib/backtrace/src/backtrace.cpp.o
> /home/nazim/cppcms/booster/lib/backtrace/src/backtrace.cpp:51:16: error:
> functions that differ only in their return type cannot be overloaded
>         extern void * _Unwind_GetIP (void *);
>                ~~~~~~ ^
> /usr/include/c++/v1/unwind-itanium.h:92:22: note: previous declaration is
> here
> extern unsigned long _Unwind_GetIP (struct _Unwind_Context *);
>        ~~~~~~~~      ^
> /home/nazim/cppcms/booster/lib/backtrace/src/backtrace.cpp:80:48: error: no
> matching function for call to '_Unwind_GetIP'
>                         d->array[d->total++] = _Unwind_GetIP(context);
>                                                ^~~~~~~~~~~~~
> /usr/include/c++/v1/unwind-itanium.h:92:22: note: candidate function not
> viable: cannot convert argument of incomplete type 'void *' to
>       'struct _Unwind_Context *'
> extern unsigned long _Unwind_GetIP (struct _Unwind_Context *);
>                      ^
> 2 errors generated.
> *** Error code 1
>
> Stop.
> make[2]: stopped in /usr/home/nazim/cppcms
> *** Error code 1
>
> Stop.
> make[1]: stopped in /usr/home/nazim/cppcms
> *** Error code 1
>
> Stop.
> make: stopped in /usr/home/nazim/cppcms/booster
>
> I already read the conversion on the bug #78.
> /usr/include/c++/v1/unwind-itanium.h is (indirectly) included by
> /usr/include/c++/v1/cxxabi.h. backtrace.cpp file includes cxxabi.h at the
> line #26, but feature testing code in CMakeLists.txt doesn't have such
> #include directive (which makes CMake to succeed the feature test, while the
> actual compilation fails).
>
> But, if we add following code to the booster's CMakeLists.txt, then the
> feature test fails and the compilation completes without error.
>
>   check_cxx_source_compiles(
>           "#include <execinfo.h>
>           int main() { backtrace(0,0); }"
>           BOOSTER_HAVE_EXECINFO)
>
>   check_cxx_source_compiles(
>           "#include <stdexcept>
>            #include <iostream>
>            #include <stdlib.h>
>            #include <string.h>
>            #include <sstream>
>            #include <typeinfo>
>            #include <new>
> +
> +          #if defined(__GNUC__)
> +          #include <cxxabi.h>
> +          #endif
> +
>             extern \"C\" {
>              extern void* _Unwind_GetIP (void *);
>              extern int _Unwind_Backtrace(int (*)(void *,void *),void *);
>            }
>
>           int main() { _Unwind_Backtrace(0,0); _Unwind_GetIP(0); }"
>           BOOSTER_HAVE_UNWIND_BACKTRACE)
>
>
>   Check_cxx_source_compiles(
>           "#include <atomic.h>
>
>
> I am also sending output of 'svn diff' as attachment, for anyone who may
> experience same issue on the future.
>
> Regards,
> Nazim Can.
>
>
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