error in qglobal.h

[clogwog]

After finding the following error, i removed and re-installed the latest Qt environment (OSx) from scratch and i'm still getting :

/Users/user/Qt/5.5/clang_64/lib/QtCore.framework/Headers/qglobal.h:39:12: fatal error: 
      'cstddef' file not found
#  include <cstddef>

when compiling a qml project.

line 39 of qglobal.h looks like

#ifdef __cplusplus
#  include <cstddef>
#endif

so i'm wondering if the extra space in the #include directive is what is causing it ? any tips where i can investigate further ?

[clogwog]

nevermind, i saw someone had a different error but adding

QMAKE_MAC_SDK = macosx10.11

in the pro file also fixes this.