test-utils.c:233: error: integer constant is too large for ‘long’ type

[Shawn J. Goff]

I'm trying to add a libqmi package to Buildroot and I'm getting an error 
I can't explain. The integer operations tests are failing because 
guint64 is defined as 'long' instead of 'long long'. I did a grep 
'typdef.*guint64' in the glib include directory (in fact, I searched 
buildroot's entire output/staging directory, which contains all 
libraries and header files) and saw "G_GNUC_EXTENSION typedef unsigned 
long long guint64;", so it's definitely defined as 'long long' there. I 
did a search in the libqmi project also, and it's not redefining it 
anywhere, so I have no idea how it's defined as 'long' here.

Any idea what else I can do to track this down?