On 26/07/2016 17:10, LMH wrote:
Csaba Raduly wrote:
Steps for building in a separate build directory:
mkdir _build
cd _build
cmake ..
Csaba
I looked for the syntax for this when I first started. I assumed the the
author put the CMakeLists.txt file in the right place. I almost never
have my make file in the src directory when using gnu make, so this
looked the same to me. I didn't find any doc about how to have the
CMakeLists.txt and the src in different directories.
Csaba was clear but it seems you are misunderstanding,
the call to cmake is
cmake [options] <path-to-source>
so I will put together his suggestion and Tony's one:
$ git pull https://bitbucket.org/tomilov/quickhull/src
$ ls src/
CMakeLists.txt include README.md src test
$ mkdir build
$ cd build
$ cmake -DCMAKE_CXX_COMPILER=clang ../src
the "build" directory is in this case parallel to the "src" one.
Unfortunately it will fail on "Compiler does not support C++1z standard"
and you will need to modify the original CMakeLists.txt.
I cut
-------------------------------------------------------------------
-CHECK_CXX_COMPILER_FLAG("-std=gnu++1z" COMPILER_SUPPORTS_CXX1Z)
-if(NOT COMPILER_SUPPORTS_CXX1Z)
- message(FATAL_ERROR "Compiler does not support C++1z standard")
-endif()
-add_compile_options("-std=gnu++1z")
-------------------------------------------------------------------
But there are other issues on the road; I passed some with
cmake -DCMAKE_CXX_COMPILER=clang -DCMAKE_CXX_FLAGS="-std=gnu++1z
-I/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/include/c++/
-I/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/include/c++/x86_64-pc-cygwin/" ../src
but the build stop here
--------------------------------------------------------------------------
/pub/temp/src/src/simple_use.cpp:146:16: fatal error: no member named
'chrono' in namespace 'std'
using std::chrono::duration_cast;
~~~~~^
15 warnings and 1 error generated.
make[2]: *** [CMakeFiles/qh.dir/build.make:66:
CMakeFiles/qh.dir/src/simple_use.cpp.o] Error 1
---------------------------------------------------------------------------
and I am out of my C++ knowledge
Regards
Marco
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