Hello,

I would like to use the <a href="https://github.com/nlohmann/json">nlohmann/json</a> library under QNX 6.6 for an 
ARMv7le. 

Since this library is supposed to run under Vanilla C++11, but only under GCC 4.8. <
That's why Iadded <a href="https://community.qnx.com/sf/frs/do/viewRelease/projects.toolchain/frs.gcc.gcc_4_8">this one<
/a> under QNX 6.6. 
Also the <a href="https://community.qnx.com/sf/frs/do/viewRelease/projects.toolchain/frs.binutils.binutils_2_25">
Binutils 2.25</a> under qnx 6.6.

Now I can build the whole thing "a little" further. But I now get errors with some C++11 standard libraries under qnx, 
affected seem to be cmath, underlying math.h; cstdio; string;
The compiler outputs the following:

Description	Resource	Path	Location	Type
'isfinite' is not a member of 'std'	parser.hpp	../external/json/include/nlohmann/detail/input	line 261	C/C++ Problem
Description	Resource	Path	Location	Type
'isinf' is not a member of 'std'	binary_writer.hpp	../external/json/include/nlohmann/detail/output	line 199	C/C++ 
Problem
Description	Resource	Path	Location	Type
'signbit' is not a member of 'std'	to_chars.hpp	../external/json/include/nlohmann/detail/conversions	line 1063	C/C++ 
Problem
Description	Resource	Path	Location	Type
'snprintf' is not a member of 'std'	binary_reader.hpp	../external/json/include/nlohmann/detail/input	line 322	C/C++ 
Problem
Description	Resource	Path	Location	Type
'std::to_string' has not been declared	iteration_proxy.hpp	../external/json/include/nlohmann/detail/iterators	line 20	C/
C++ Problem
Description	Resource	Path	Location	Type
'stoull' is not a member of 'std'	json_pointer.hpp	../external/json/include/nlohmann/detail	line 191	C/C++ Problem

For example, when I remove std:: I get this error message :'isfinite' was not declared in this scope

sincerely david haufe