I'm facing a problem I wasn't able to resolve in days.
I want to include some VTK header within my .m file, which works up to the point where some further linked VTK-Headers within the one I included tries to do:
#include <fstream>
An error occurs saying
'fstream' file not found
After some googling I came across the solution to add the following to my 'Header Search Paths': "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/"
The file now seems to be found, but some new errors occurred.
Could not build module 'std'
Unknown typename 'namespace'
Unknown typename '_LIBCPP_BEGIN_NAMESPACE_STD'
Unknown typename '_LIBCPP_END_NAMESPACE_STD'
Expected ';' after top level declarator
etc.
These occur whithin __nullptr, cstddef, type_traits.
I also tried to change the "C++ Standard Library" from 'Compiler Default' to 'libc++' or 'libstdc++', but nothing worked.
Does anybody know how to resolve this?
Additional Information:
As already mentioned, changing the file types from Objective-C (.m extension) to Objective-C++ (.mm extension) resolved the issue.