On Mon, Dec 10, 2018 at 9:11 AM <[email protected]> wrote: > > Hello, > > I have a simple C++ code that makes use of some of the APIs of OpenCASCADE, > and I have successfully run compiled with clang in macOS. I want to call the > functions implemented in my C++ codebase, so I'm using wasm for it (I already > have some code that does not call OpenCASCADE working in a browser). > > Normally, I compile my C++ code using CMake: > > cmake_minimum_required(VERSION 3.12) > project(oc_test) > > set(CMAKE_VERBOSE_MAKEFILE on) > set(CMAKE_CXX_STANDARD 14) > > include_directories(/usr/local/include/opencascade) > link_directories(/usr/local/lib) > > add_executable(oc_test_bin CMakeLists.txt main.cpp) > > target_link_libraries(oc_test_bin TKernel TKXSBase TKIGES TKBrep TKGeomBase > TKTopAlgo TKG3d) > > > If I try to compile the former project with > > emconfigure cmake . > > emmake make > > it compiles fine, but on the linking stage I get warnings such as > > error: undefined symbol: > _ZN11GeomConvert23SurfaceToBSplineSurfaceERKN11opencascade6handleI12Geom_SurfaceEE > warning: To disable errors for undefined symbols use `-s > ERROR_ON_UNDEFINED_SYMBOLS=0` > error: undefined symbol: > _ZN13Standard_Type8RegisterEPKcS1_mRKN11opencascade6handleIS_EE > error: undefined symbol: _ZN16Standard_Failure16SetMessageStringEPKc > error: undefined symbol: _ZN16Standard_FailureC2EPKc > > Which indeed refer to the symbols the OpenCASCADE library. > > On the other hand, I'm trying to compile OpenCASCADE so I can get the .bc > files to link, but I don't manage to do that. I download the source code, and > I fail to build the CMake project. When doing > > emconfigure cmake . > > the system doesn't find FreeType neither TCL-TK: > > Could not find headers of used third-party products: > 3RDPARTY_TCL_INCLUDE_DIR 3RDPARTY_TK_INCLUDE_DIR > 3RDPARTY_FREETYPE_INCLUDE_DIR_ft2build > 3RDPARTY_FREETYPE_INCLUDE_DIR_freetype2 > > Then, if I disable USE_TCL and USE_FREETYPE, I manage to generate the > Makefile, but when compiling I get the following error: > > [ 1%] Building CXX object > src/TKernel/CMakeFiles/TKernel.dir/__/OSD/OSD_Path.cxx.o > opencascade-7.3.0/src/OSD/OSD_Path.cxx:45:18: error: variable has incomplete > type > 'struct utsname' > struct utsname info; > ^ > opencascade-7.3.0/src/OSD/OSD_Path.cxx:45:10: note: forward declaration of > 'utsname' > struct utsname info; > ^ > 1 error generated. > ERROR:root:compiler frontend failed to generate LLVM bitcode, halting > make[2]: *** [src/TKernel/CMakeFiles/TKernel.dir/__/OSD/OSD_Path.cxx.o] Error > 1 > make[1]: *** [src/TKernel/CMakeFiles/TKernel.dir/all] Error 2 > make: *** [all] Error 2 > > Any ideas on what might be causing this?
`struct utsname` is defined in `sys/utsname.h` which is availing in emscripten. Perhaps this header is not correctly being detected during cmake therefore not bring included? Perhaps the code is simply failing to include this header and relying on its transitive inclusion on other platforms? > > Thanks! > > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
