[Mingw-users] Mingw64 & include directory?

[Domonic T. <AbD...@ho...>]

I have installed Mingw64 on my PC.  Recently I found a problem.

I built a gui toolkit called Fast Light Tool Kit (FLTK) and my build environment directories (using MSYS) was structured as:

c:/minw/include    & c:/mingw/lib



The problem started when I included the math.h file in my project   #include <math.h>


FLTK contains a math.h file which refers to usr/include/math.h which then directs my compiler to find the math.h file in the designated include directory c:/mingw/include...   But this is not what happens.


My math.h c++ header is actually located in the lib directory??

C:\mingw\lib\gcc\x86_64-w64-mingw32\5.1.0\include\c++\tr1


Because of this, the compiler cannot find the file it is being directed to via the FLTK math.h file.

I thought the MSYS build system is supposed to emulate a linux build environment on Windows.


I'm not sure if it is something I've done wrong,,, or,, is this problem unique to Mingw64?   How do I fix this?


Thanks