[CMake] Correct settings to add docopt.cpp to target list

[Adam Getchell]

I should note that I'm doing an out of source build, and that for my
project the following line works:

┌─[*adam*][Hapkido][*±*][docopt *✓*][~/CDT-plusplus/build]

└─▪ clang++ --std=c++11 --stdlib=libc++ -I ../src/docopt
../src/docopt/docopt.cpp ../src/cdt-docopt.cpp -o cdt_docopt

On Thu, Dec 4, 2014 at 9:30 PM, Adam Getchell <adam.getchell at gmail.com>
wrote:

> Hello all,
>
> I’m trying to use the docopt.cpp parser for my project[1]:
>
> https://github.com/docopt/docopt.cpp
>
> The usual invocation to build works:
>
> ┌─[*adam*][Hapkido][*±*][docopt *✗*][~/CDT-plusplus/src/docopt]
> └─▪ clang++ --std=c++11 --stdlib=libc++ -I . docopt.cpp
> examples/naval_fate.cpp -o naval_fate
>
> So, I want to add docopt.cpp and have the compiler look for header files
> in the same directory, and add that to my executable.
>
> So far, what I’ve attempted is to add the lines:
>
> include_directories (BEFORE "src/docopt")
> add_library(docopt.cpp "src/docopt/docopt.cpp”)
>
> My program uses CGAL[2], and all of those library headers are incorporated
> using the create_single_source_cgal_program function in the
> CGAL_CreateSingleSourceCGALProgram.cmake module.
>
> The error messages I’m getting correspond to the ones I get when
> docopt.cpp is not included:
>
> ┌─[*adam*][Hapkido][*±*][docopt *✗*][~/CDT-plusplus/src/docopt]
> └─▪ clang++ --std=c++11 --stdlib=libc++ -I . examples/naval_fate.cpp -o
> naval_fate
> Undefined symbols for architecture x86_64:
>   "docopt::docopt(std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> > const&,
> std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> >,
> std::__1::allocator<std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> > > > const&, bool,
> std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> > const&, bool)", referenced from:
>       _main in naval_fate-780283.o
>   "docopt::operator<<(std::__1::basic_ostream<char,
> std::__1::char_traits<char> >&, docopt::value const&)", referenced from:
>       _main in naval_fate-780283.o
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
> Compare to:
>
> ┌─[*adam*][Hapkido][*±*][docopt *✗*][~/CDT-plusplus]
> └─▪ ./build.sh
> -- The C compiler identification is AppleClang 6.0.0.6000054
> -- The CXX compiler identification is AppleClang 6.0.0.6000054
> -- Check for working C compiler using: Ninja
> -- Check for working C compiler using: Ninja -- works
> -- Detecting C compiler ABI info
> -- Detecting C compiler ABI info - done
> -- Check for working CXX compiler using: Ninja
> -- Check for working CXX compiler using: Ninja -- works
> -- Detecting CXX compiler ABI info
> -- Detecting CXX compiler ABI info - done
> -- Build type: Release
> -- USING CXXFLAGS = ' -O3 -DNDEBUG'
> -- USING EXEFLAGS = '
> -Wl,-dylib_file,/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
> '
> -- Targetting Ninja
> -- Using /usr/bin/c++ compiler.
> -- DARWIN_VERSION=14
> -- Mac Leopard detected
> -- Requested component: Core
> -- Requested component: MPFR
> -- Requested component: GMP
> -- Found Eigen3: /usr/local/include/eigen3 (found suitable version
> "3.2.2", minimum required is "3.1.0")
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /Users/adam/CDT-plusplus/build
> [10/13] Linking CXX executable cdt-docopt
> FAILED: : && /usr/bin/c++   -O3 -DNDEBUG -Wl,-search_paths_first
> -Wl,-headerpad_max_install_names
> -Wl,-dylib_file,/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
> CMakeFiles/cdt-docopt.dir/src/cdt-docopt.cpp.o  -o cdt-docopt
> -L/Users/adam/gmock-1.7.0/lib/.libs
> -L/Users/adam/gmock-1.7.0/gtest/lib/.libs /usr/local/lib/libmpfr.dylib
> /usr/local/lib/libgmp.dylib /usr/local/lib/libCGAL_Core.dylib
> /usr/local/lib/libCGAL.dylib /usr/local/lib/libboost_thread-mt.dylib
> /usr/local/lib/libboost_system-mt.dylib /usr/local/lib/libCGAL_Core.dylib
> /usr/local/lib/libCGAL.dylib /usr/local/lib/libboost_thread-mt.dylib
> /usr/local/lib/libboost_system-mt.dylib
> -Wl,-rpath,/Users/adam/gmock-1.7.0/lib/.libs
> -Wl,-rpath,/Users/adam/gmock-1.7.0/gtest/lib/.libs && :
> Undefined symbols for architecture x86_64:
>   "docopt::docopt(std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> > const&,
> std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> >,
> std::__1::allocator<std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> > > > const&, bool,
> std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> > const&, bool)", referenced from:
>       _main in cdt-docopt.cpp.o
>   "docopt::operator<<(std::__1::basic_ostream<char,
> std::__1::char_traits<char> >&, docopt::value const&)", referenced from:
>       _main in cdt-docopt.cpp.o
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
> [10/13] Building CXX object
> CMakeFiles/unittests.dir/unittests/Triangulated2SphereTest.cpp.o
> ninja: build stopped: subcommand failed.
>
> Any suggestions?
>
> [1] https://github.com/acgetchell/CDT-plusplus/tree/docopt
> [2] https://www.cgal.org
>
> Adam Getchell
> about.me/adamgetchell
>
>


-- 
Adam Getchell
about.me/adamgetchell
"Invincibility is in oneself, vulnerability in the opponent." -- Sun Tzu
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